Class: Google::Cloud::Compute::V1::BackendService

Inherits:

Object

• Object
• Google::Cloud::Compute::V1::BackendService

Extended by:

Protobuf::MessageExts::ClassMethods

Includes:

Protobuf::MessageExts

Defined in:

proto_docs/google/cloud/compute/v1/compute.rb

Overview

Represents a Backend Service resource. A backend service defines how Google Cloud load balancers distribute traffic. The backend service configuration contains a set of values, such as the protocol used to connect to backends, various distribution and session settings, health checks, and timeouts. These settings provide fine-grained control over how your load balancer behaves. Most of the settings have default values that allow for easy configuration if you need to get started quickly. Backend services in Google Compute Engine can be either regionally or globally scoped. * Global * Regional For more information, see Backend Services.

Defined Under Namespace

Modules: CompressionMode, IpAddressSelectionPolicy, LoadBalancingScheme, LocalityLbPolicy, Protocol, SessionAffinity Classes: MetadatasEntry

Instance Attribute Summary

• #affinity_cookie_ttl_sec ⇒ ::Integer

  Lifetime of cookies in seconds.

• #backends ⇒ ::Array<::Google::Cloud::Compute::V1::Backend>

  The list of backends that serve this BackendService.

• #cdn_policy ⇒ ::Google::Cloud::Compute::V1::BackendServiceCdnPolicy

  Cloud CDN configuration for this BackendService.

• #circuit_breakers ⇒ ::Google::Cloud::Compute::V1::CircuitBreakers
• #compression_mode ⇒ ::String

  Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.

• #connection_draining ⇒ ::Google::Cloud::Compute::V1::ConnectionDraining

  ConnectionDraining cannot be specified with haPolicy.

• #connection_tracking_policy ⇒ ::Google::Cloud::Compute::V1::BackendServiceConnectionTrackingPolicy

  Connection Tracking configuration for this BackendService.

• #consistent_hash ⇒ ::Google::Cloud::Compute::V1::ConsistentHashLoadBalancerSettings

  Consistent Hash-based load balancing can be used to provide soft session affinity based on HTTP headers, cookies or other properties.

• #creation_timestamp ⇒ ::String

  [Output Only] Creation timestamp in RFC3339 text format.

• #custom_metrics ⇒ ::Array<::Google::Cloud::Compute::V1::BackendServiceCustomMetric>

  List of custom metrics that are used for the WEIGHTED_ROUND_ROBIN locality_lb_policy.

• #custom_request_headers ⇒ ::Array<::String>

  Headers that the load balancer adds to proxied requests.

• #custom_response_headers ⇒ ::Array<::String>

  Headers that the load balancer adds to proxied responses.

• #description ⇒ ::String

  An optional description of this resource.

• #edge_security_policy ⇒ ::String

  [Output Only] The resource URL for the edge security policy associated with this backend service.

• #enable_c_d_n ⇒ ::Boolean

  If true, enables Cloud CDN for the backend service of a global external Application Load Balancer.

• #failover_policy ⇒ ::Google::Cloud::Compute::V1::BackendServiceFailoverPolicy

  Requires at least one backend instance group to be defined as a backup (failover) backend.

• #fingerprint ⇒ ::String

  Fingerprint of this resource.

• #ha_policy ⇒ ::Google::Cloud::Compute::V1::BackendServiceHAPolicy

  Configures self-managed High Availability (HA) for External and Internal Protocol Forwarding.

• #health_checks ⇒ ::Array<::String>

  The list of URLs to the healthChecks, httpHealthChecks (legacy), or httpsHealthChecks (legacy) resource for health checking this backend service.

• #iap ⇒ ::Google::Cloud::Compute::V1::BackendServiceIAP

  The configurations for Identity-Aware Proxy on this resource.

• #id ⇒ ::Integer

  [Output Only] The unique identifier for the resource.

• #ip_address_selection_policy ⇒ ::String

  Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC).

• #kind ⇒ ::String

  [Output Only] Type of resource.

• #load_balancing_scheme ⇒ ::String

  Specifies the load balancer type.

• #locality_lb_policies ⇒ ::Array<::Google::Cloud::Compute::V1::BackendServiceLocalityLoadBalancingPolicyConfig>

  A list of locality load-balancing policies to be used in order of preference.

• #locality_lb_policy ⇒ ::String

  The load balancing algorithm used within the scope of the locality.

• #log_config ⇒ ::Google::Cloud::Compute::V1::BackendServiceLogConfig

  This field denotes the logging options for the load balancer traffic served by this backend service.

• #max_stream_duration ⇒ ::Google::Cloud::Compute::V1::Duration

  Specifies the default maximum duration (timeout) for streams to this service.

• #metadatas ⇒ ::Google::Protobuf::Map{::String => ::String}

  Deployment metadata associated with the resource to be set by a GKE hub controller and read by the backend RCTH.

• #name ⇒ ::String

  Name of the resource.

• #network ⇒ ::String

  The URL of the network to which this backend service belongs.

• #outlier_detection ⇒ ::Google::Cloud::Compute::V1::OutlierDetection

  Settings controlling the ejection of unhealthy backend endpoints from the load balancing pool of each individual proxy instance that processes the traffic for the given backend service.

• #port ⇒ ::Integer

  Deprecated in favor of portName.

• #port_name ⇒ ::String

  A named port on a backend instance group representing the port for communication to the backend VMs in that group.

• #protocol ⇒ ::String

  The protocol this BackendService uses to communicate with backends.

• #region ⇒ ::String

  [Output Only] URL of the region where the regional backend service resides.

• #security_policy ⇒ ::String

  [Output Only] The resource URL for the security policy associated with this backend service.

• #security_settings ⇒ ::Google::Cloud::Compute::V1::SecuritySettings

  This field specifies the security settings that apply to this backend service.

• #self_link ⇒ ::String

  [Output Only] Server-defined URL for the resource.

• #service_bindings ⇒ ::Array<::String>

  URLs of networkservices.ServiceBinding resources.

• #service_lb_policy ⇒ ::String

  URL to networkservices.ServiceLbPolicy resource.

• #session_affinity ⇒ ::String

  Type of session affinity to use.

• #strong_session_affinity_cookie ⇒ ::Google::Cloud::Compute::V1::BackendServiceHttpCookie

  Describes the HTTP cookie used for stateful session affinity.

• #subsetting ⇒ ::Google::Cloud::Compute::V1::Subsetting

  Subsetting cannot be specified with haPolicy.

• #timeout_sec ⇒ ::Integer

  The backend service timeout has a different meaning depending on the type of load balancer.

• #used_by ⇒ ::Array<::Google::Cloud::Compute::V1::BackendServiceUsedBy>

  [Output Only] List of resources referencing given backend service.

Instance Attribute Details

#affinity_cookie_ttl_sec ⇒ ::Integer

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#backends ⇒ ::Array<::Google::Cloud::Compute::V1::Backend>

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#cdn_policy ⇒ ::Google::Cloud::Compute::V1::BackendServiceCdnPolicy

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#circuit_breakers ⇒ ::Google::Cloud::Compute::V1::CircuitBreakers

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#compression_mode ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#connection_draining ⇒ ::Google::Cloud::Compute::V1::ConnectionDraining

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#connection_tracking_policy ⇒ ::Google::Cloud::Compute::V1::BackendServiceConnectionTrackingPolicy

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#consistent_hash ⇒ ::Google::Cloud::Compute::V1::ConsistentHashLoadBalancerSettings

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#creation_timestamp ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#custom_metrics ⇒ ::Array<::Google::Cloud::Compute::V1::BackendServiceCustomMetric>

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#custom_request_headers ⇒ ::Array<::String>

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#custom_response_headers ⇒ ::Array<::String>

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#description ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#edge_security_policy ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#enable_c_d_n ⇒ ::Boolean

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#failover_policy ⇒ ::Google::Cloud::Compute::V1::BackendServiceFailoverPolicy

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#fingerprint ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#ha_policy ⇒ ::Google::Cloud::Compute::V1::BackendServiceHAPolicy

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#health_checks ⇒ ::Array<::String>

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#iap ⇒ ::Google::Cloud::Compute::V1::BackendServiceIAP

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#id ⇒ ::Integer

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#ip_address_selection_policy ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#kind ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#load_balancing_scheme ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#locality_lb_policies ⇒ ::Array<::Google::Cloud::Compute::V1::BackendServiceLocalityLoadBalancingPolicyConfig>

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#locality_lb_policy ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#log_config ⇒ ::Google::Cloud::Compute::V1::BackendServiceLogConfig

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#max_stream_duration ⇒ ::Google::Cloud::Compute::V1::Duration

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#metadatas ⇒ ::Google::Protobuf::Map{::String => ::String}

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#name ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#network ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#outlier_detection ⇒ ::Google::Cloud::Compute::V1::OutlierDetection

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#port ⇒ ::Integer

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#port_name ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#protocol ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#region ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#security_policy ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#security_settings ⇒ ::Google::Cloud::Compute::V1::SecuritySettings

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#self_link ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#service_bindings ⇒ ::Array<::String>

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#service_lb_policy ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#session_affinity ⇒ ::String

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#strong_session_affinity_cookie ⇒ ::Google::Cloud::Compute::V1::BackendServiceHttpCookie

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#subsetting ⇒ ::Google::Cloud::Compute::V1::Subsetting

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#timeout_sec ⇒ ::Integer

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end

#used_by ⇒ ::Array<::Google::Cloud::Compute::V1::BackendServiceUsedBy>

# File 'proto_docs/google/cloud/compute/v1/compute.rb', line 3804

class BackendService
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::String]
  class MetadatasEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Compress text responses using Brotli or gzip compression, based on the client's Accept-Encoding header.
  module CompressionMode
    # A value indicating that the enum field is not set.
    UNDEFINED_COMPRESSION_MODE = 0

    # Automatically uses the best compression based on the Accept-Encoding header sent by the client.
    AUTOMATIC = 165_298_699

    # Disables compression. Existing compressed responses cached by Cloud CDN will not be served to clients.
    DISABLED = 516_696_700
  end

  # Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
  module IpAddressSelectionPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_IP_ADDRESS_SELECTION_POLICY = 0

    # Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
    IPV4_ONLY = 22_373_798

    # Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
    IPV6_ONLY = 79_632_100

    # Unspecified IP address selection policy.
    IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED = 36_210_144

    # Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
    PREFER_IPV6 = 408_601_302
  end

  # Specifies the load balancer type. A backend service created for one type of load balancer cannot be used with another. For more information, refer to Choosing a load balancer.
  module LoadBalancingScheme
    # A value indicating that the enum field is not set.
    UNDEFINED_LOAD_BALANCING_SCHEME = 0

    # Signifies that this will be used for classic Application Load Balancers, global external proxy Network Load Balancers, or external passthrough Network Load Balancers.
    EXTERNAL = 35_607_499

    # Signifies that this will be used for global external Application Load Balancers, regional external Application Load Balancers, or regional external proxy Network Load Balancers.
    EXTERNAL_MANAGED = 512_006_923

    # Signifies that this will be used for internal passthrough Network Load Balancers.
    INTERNAL = 279_295_677

    # Signifies that this will be used for internal Application Load Balancers.
    INTERNAL_MANAGED = 37_350_397

    # Signifies that this will be used by Traffic Director.
    INTERNAL_SELF_MANAGED = 236_211_150

    INVALID_LOAD_BALANCING_SCHEME = 275_352_060
  end

  # The load balancing algorithm used within the scope of the locality. The possible values are: - ROUND_ROBIN: This is a simple policy in which each healthy backend is selected in round robin order. This is the default. - LEAST_REQUEST: An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests. - RING_HASH: The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests. - RANDOM: The load balancer selects a random healthy host. - ORIGINAL_DESTINATION: Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer. - MAGLEV: used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824 This field is applicable to either: - A regional backend service with the service_protocol set to HTTP, HTTPS, or HTTP2, and load_balancing_scheme set to INTERNAL_MANAGED. - A global backend service with the load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or EXTERNAL_MANAGED. If sessionAffinity is not configured—that is, if session affinity remains at the default value of NONE—then the default value for localityLbPolicy is ROUND_ROBIN. If session affinity is set to a value other than NONE, then the default value for localityLbPolicy is MAGLEV. Only ROUND_ROBIN and RING_HASH are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. localityLbPolicy cannot be specified with haPolicy.
  module LocalityLbPolicy
    # A value indicating that the enum field is not set.
    UNDEFINED_LOCALITY_LB_POLICY = 0

    INVALID_LB_POLICY = 323_318_707

    # An O(1) algorithm which selects two random healthy hosts and picks the host which has fewer active requests.
    LEAST_REQUEST = 46_604_921

    # This algorithm implements consistent hashing to backends. Maglev can be used as a drop in replacement for the ring hash load balancer. Maglev is not as stable as ring hash but has faster table lookup build times and host selection times. For more information about Maglev, see https://ai.google/research/pubs/pub44824
    MAGLEV = 119_180_266

    # Backend host is selected based on the client connection metadata, i.e., connections are opened to the same address as the destination address of the incoming connection before the connection was redirected to the load balancer.
    ORIGINAL_DESTINATION = 166_297_216

    # The load balancer selects a random healthy host.
    RANDOM = 262_527_171

    # The ring/modulo hash load balancer implements consistent hashing to backends. The algorithm has the property that the addition/removal of a host from a set of N hosts only affects 1/N of the requests.
    RING_HASH = 432_795_069

    # This is a simple policy in which each healthy backend is selected in round robin order. This is the default.
    ROUND_ROBIN = 153_895_801

    # Per-instance weighted Load Balancing via health check reported weights. If set, the Backend Service must configure a non legacy HTTP-based Health Check, and health check replies are expected to contain non-standard HTTP response header field X-Load-Balancing-Endpoint-Weight to specify the per-instance weights. If set, Load Balancing is weighted based on the per-instance weights reported in the last processed health check replies, as long as every instance either reported a valid weight or had UNAVAILABLE_WEIGHT. Otherwise, Load Balancing remains equal-weight. This option is only supported in Network Load Balancing.
    WEIGHTED_MAGLEV = 254_930_962

    # Per-endpoint weighted round-robin Load Balancing using weights computed from Backend reported Custom Metrics. If set, the Backend Service responses are expected to contain non-standard HTTP response header field X-Endpoint-Load-Metrics. The reported metrics to use for computing the weights are specified via the backends[].customMetrics fields.
    WEIGHTED_ROUND_ROBIN = 5_584_977
  end

  # The protocol this BackendService uses to communicate with backends. Possible values are HTTP, HTTPS, HTTP2, TCP, SSL, UDP or GRPC. depending on the chosen load balancer or Traffic Director configuration. Refer to the documentation for the load balancers or for Traffic Director for more information. Must be set to GRPC when the backend service is referenced by a URL map that is bound to target gRPC proxy.
  module Protocol
    # A value indicating that the enum field is not set.
    UNDEFINED_PROTOCOL = 0

    # gRPC (available for Traffic Director).
    GRPC = 2_196_510

    HTTP = 2_228_360

    # HTTP/2 with SSL.
    HTTP2 = 69_079_210

    HTTPS = 69_079_243

    # TCP proxying with SSL.
    SSL = 82_412

    # TCP proxying or TCP pass-through.
    TCP = 82_881

    # UDP.
    UDP = 83_873

    # If a Backend Service has UNSPECIFIED as its protocol, it can be used with any L3/L4 Forwarding Rules.
    UNSPECIFIED = 526_786_327
  end

  # Type of session affinity to use. The default is NONE. Only NONE and HEADER_FIELD are supported when the backend service is referenced by a URL map that is bound to target gRPC proxy that has validateForProxyless field set to true. For more details, see: [Session Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity). sessionAffinity cannot be specified with haPolicy.
  module SessionAffinity
    # A value indicating that the enum field is not set.
    UNDEFINED_SESSION_AFFINITY = 0

    # 2-tuple hash on packet's source and destination IP addresses. Connections from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy.
    CLIENT_IP = 345_665_051

    # 1-tuple hash only on packet's source IP address. Connections from the same source IP address will be served by the same backend VM while that VM remains healthy. This option can only be used for Internal TCP/UDP Load Balancing.
    CLIENT_IP_NO_DESTINATION = 106_122_516

    # 5-tuple hash on packet's source and destination IP addresses, IP protocol, and source and destination ports. Connections for the same IP protocol from the same source IP address and port to the same destination IP address and port will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PORT_PROTO = 221_722_926

    # 3-tuple hash on packet's source and destination IP addresses, and IP protocol. Connections for the same IP protocol from the same source IP address to the same destination IP address will be served by the same backend VM while that VM remains healthy. This option cannot be used for HTTP(S) load balancing.
    CLIENT_IP_PROTO = 25_322_148

    # Hash based on a cookie generated by the L7 loadbalancer. Only valid for HTTP(S) load balancing.
    GENERATED_COOKIE = 370_321_204

    # The hash is based on a user specified header field.
    HEADER_FIELD = 200_737_960

    # The hash is based on a user provided cookie.
    HTTP_COOKIE = 494_981_627

    # No session affinity. Connections from the same client IP may go to any instance in the pool.
    NONE = 2_402_104

    # Strong cookie-based affinity. Connections bearing the same cookie will be served by the same backend VM while that VM remains healthy, as long as the cookie has not expired.
    STRONG_COOKIE_AFFINITY = 438_628_091
  end
end