Class: KubernetesDeploy::KubernetesResource
- Inherits:
-
Object
- Object
- KubernetesDeploy::KubernetesResource
show all
- Defined in:
- lib/kubernetes-deploy/kubernetes_resource.rb
Direct Known Subclasses
Cloudsql, ConfigMap, CronJob, CustomResource, CustomResourceDefinition, Deployment, Elasticsearch, HorizontalPodAutoscaler, Ingress, Job, Memcached, NetworkPolicy, PersistentVolumeClaim, Pod, PodDisruptionBudget, PodSetBase, PodTemplate, Redis, ResourceQuota, Role, RoleBinding, Secret, Service, ServiceAccount, Statefulservice, Topic
Defined Under Namespace
Classes: Event
Constant Summary
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- GLOBAL =
false
- TIMEOUT =
5.minutes
- LOG_LINE_COUNT =
250
- DISABLE_FETCHING_LOG_INFO =
'DISABLE_FETCHING_LOG_INFO'
- DISABLE_FETCHING_EVENT_INFO =
'DISABLE_FETCHING_EVENT_INFO'
- DISABLED_LOG_INFO_MESSAGE =
"collection is disabled by the #{DISABLE_FETCHING_LOG_INFO} env var."
- DISABLED_EVENT_INFO_MESSAGE =
"collection is disabled by the #{DISABLE_FETCHING_EVENT_INFO} env var."
- DEBUG_RESOURCE_NOT_FOUND_MESSAGE =
"None found. Please check your usual logging service (e.g. Splunk)."
- UNUSUAL_FAILURE_MESSAGE =
<<~MSG
It is very unusual for this resource type to fail to deploy. Please try the deploy again.
If that new deploy also fails, contact your cluster administrator.
MSG
- STANDARD_TIMEOUT_MESSAGE =
<<~MSG
Kubernetes will continue to attempt to deploy this resource in the cluster, but at this point it is considered unlikely that it will succeed.
If you have reason to believe it will succeed, retry the deploy to continue to monitor the rollout.
MSG
- TIMEOUT_OVERRIDE_ANNOTATION =
"kubernetes-deploy.shopify.io/timeout-override"
- LAST_APPLIED_ANNOTATION =
"kubectl.kubernetes.io/last-applied-configuration"
- KUBECTL_OUTPUT_IS_SENSITIVE =
false
Instance Attribute Summary collapse
Class Method Summary
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Instance Method Summary
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Constructor Details
#initialize(namespace:, context:, definition:, logger:, statsd_tags: []) ⇒ KubernetesResource
Returns a new instance of KubernetesResource.
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 87
def initialize(namespace:, context:, definition:, logger:, statsd_tags: [])
@name = definition.dig("metadata", "name")
unless @name.present?
logger.summary.add_paragraph("Rendered template content:\n#{definition.to_yaml}")
raise FatalDeploymentError, "Template is missing required field metadata.name"
end
@optional_statsd_tags = statsd_tags
@namespace = namespace
@context = context
@logger = logger
@definition = definition
@statsd_report_done = false
@disappeared = false
@validation_errors = []
@instance_data = {}
end
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Instance Attribute Details
#context ⇒ Object
Returns the value of attribute context.
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 10
def context
@context
end
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#deploy_started_at=(value) ⇒ Object
Sets the attribute deploy_started_at
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 11
def deploy_started_at=(value)
@deploy_started_at = value
end
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#name ⇒ Object
Returns the value of attribute name.
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 10
def name
@name
end
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#namespace ⇒ Object
Returns the value of attribute namespace.
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 10
def namespace
@namespace
end
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#type ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 202
def type
@type || self.class.kind
end
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Class Method Details
.build(namespace:, context:, definition:, logger:, statsd_tags:, crd: nil) ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 36
def build(namespace:, context:, definition:, logger:, statsd_tags:, crd: nil)
opts = { namespace: namespace, context: context, definition: definition, logger: logger,
statsd_tags: statsd_tags }
if definition["kind"].blank?
raise InvalidTemplateError.new("Template missing 'Kind'", content: definition.to_yaml)
end
if (klass = class_for_kind(definition["kind"]))
return klass.new(**opts)
end
if crd
CustomResource.new(crd: crd, **opts)
else
inst = new(**opts)
inst.type = definition["kind"]
inst
end
end
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.class_for_kind(kind) ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 54
def class_for_kind(kind)
if KubernetesDeploy.const_defined?(kind)
KubernetesDeploy.const_get(kind) end
rescue NameError
nil
end
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.kind ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 66
def kind
name.demodulize
end
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.timeout ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 62
def timeout
self::TIMEOUT
end
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Instance Method Details
#<=>(other) ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 140
def <=>(other)
id <=> other.id
end
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#after_sync ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 155
def after_sync
end
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#current_generation ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 187
def current_generation
return -1 unless exists? @instance_data.dig("metadata", "generation")
end
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#debug_message(cause = nil, info_hash = {}) ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 225
def debug_message(cause = nil, info_hash = {})
helpful_info = []
if cause == :gave_up
debug_heading = ColorizedString.new("#{id}: GLOBAL WATCH TIMEOUT (#{info_hash[:timeout]} seconds)").yellow
helpful_info << "If you expected it to take longer than #{info_hash[:timeout]} seconds for your deploy"\
" to roll out, increase --max-watch-seconds."
elsif deploy_failed?
debug_heading = ColorizedString.new("#{id}: FAILED").red
helpful_info << failure_message if failure_message.present?
elsif deploy_timed_out?
debug_heading = ColorizedString.new("#{id}: TIMED OUT (#{pretty_timeout_type})").yellow
helpful_info << timeout_message if timeout_message.present?
else
debug_heading = ColorizedString.new("#{id}: MONITORING ERROR").red
helpful_info << failure_message if failure_message.present?
helpful_info << timeout_message if timeout_message.present? && timeout_message != STANDARD_TIMEOUT_MESSAGE
end
final_status = " - Final status: #{status}"
final_status = "\n#{final_status}" if helpful_info.present? && !helpful_info.last.end_with?("\n")
helpful_info.prepend(debug_heading)
helpful_info << final_status
if @debug_events.present?
helpful_info << " - Events (common success events excluded):"
@debug_events.each do |identifier, event_hashes|
event_hashes.each { |event| helpful_info << " [#{identifier}]\t#{event}" }
end
elsif ENV[DISABLE_FETCHING_EVENT_INFO]
helpful_info << " - Events: #{DISABLED_EVENT_INFO_MESSAGE}"
else
helpful_info << " - Events: #{DEBUG_RESOURCE_NOT_FOUND_MESSAGE}"
end
if print_debug_logs?
if ENV[DISABLE_FETCHING_LOG_INFO]
helpful_info << " - Logs: #{DISABLED_LOG_INFO_MESSAGE}"
elsif @debug_logs.blank?
helpful_info << " - Logs: #{DEBUG_RESOURCE_NOT_FOUND_MESSAGE}"
else
container_logs = @debug_logs.container_logs.sort_by { |c| c.lines.length }
container_logs.each do |logs|
if logs.empty?
helpful_info << " - Logs from container '#{logs.container_name}': #{DEBUG_RESOURCE_NOT_FOUND_MESSAGE}"
next
end
if logs.lines.length == ContainerLogs::DEFAULT_LINE_LIMIT
truncated = " (last #{ContainerLogs::DEFAULT_LINE_LIMIT} lines shown)"
end
helpful_info << " - Logs from container '#{logs.container_name}'#{truncated}:"
logs.lines.each do |line|
helpful_info << " #{line}"
end
end
end
end
helpful_info.join("\n")
end
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#deploy_failed? ⇒ Boolean
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 166
def deploy_failed?
false
end
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#deploy_method ⇒ Object
Expected values: :apply, :replace, :replace_force
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 216
def deploy_method
:apply
end
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#deploy_started? ⇒ Boolean
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 170
def deploy_started?
@deploy_started_at.present?
end
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#deploy_succeeded? ⇒ Boolean
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 174
def deploy_succeeded?
return false unless deploy_started?
unless @success_assumption_warning_shown
@logger.warn("Don't know how to monitor resources of type #{type}. Assuming #{id} deployed successfully.")
@success_assumption_warning_shown = true
end
true
end
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#deploy_timed_out? ⇒ Boolean
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 210
def deploy_timed_out?
return false unless deploy_started?
!deploy_succeeded? && !deploy_failed? && (Time.now.utc - @deploy_started_at > timeout)
end
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#disappeared? ⇒ Boolean
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 162
def disappeared?
@disappeared
end
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#exists? ⇒ Boolean
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 183
def exists?
@instance_data.present?
end
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#failure_message ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 310
def failure_message
end
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#fetch_events(kubectl) ⇒ Object
Returns a hash in the following format:
"pod/web-1" => [
"Pulling: pulling image "hello-world:latest" (1 events)",
"Pulled: Successfully pulled image "hello-world:latest" (1 events)"
]
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 294
def fetch_events(kubectl)
return {} unless exists?
out, _err, st = kubectl.run("get", "events", "--output=go-template=#{Event.go_template_for(type, name)}",
log_failure: false)
return {} unless st.success?
event_collector = Hash.new { |hash, key| hash[key] = [] }
Event.(out).each_with_object(event_collector) do |candidate, events|
events[id] << candidate.to_s if candidate.seen_since?(@deploy_started_at - 5.seconds)
end
end
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#file_path ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 144
def file_path
file.path
end
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#global? ⇒ Boolean
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 389
def global?
self.class::GLOBAL
end
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#id ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 136
def id
"#{type}/#{name}"
end
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#kubectl_output_is_sensitive? ⇒ Boolean
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 325
def kubectl_output_is_sensitive?
self.class::KUBECTL_OUTPUT_IS_SENSITIVE
end
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#kubectl_resource_type ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 206
def kubectl_resource_type
type
end
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#observed_generation ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 192
def observed_generation
return -2 unless exists?
@instance_data.dig('status', 'observedGeneration')
end
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#pretty_status ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 313
def pretty_status
padding = " " * [50 - id.length, 1].max
"#{id}#{padding}#{status}"
end
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#pretty_timeout_type ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 83
def pretty_timeout_type
"timeout: #{timeout}s"
end
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#report_status_to_statsd(watch_time) ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 318
def report_status_to_statsd(watch_time)
unless @statsd_report_done
StatsD.distribution('resource.duration', watch_time, tags: statsd_tags)
@statsd_report_done = true
end
end
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#status ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 198
def status
exists? ? "Exists" : "Not Found"
end
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#sync(cache) ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 148
def sync(cache)
@instance_data = cache.get_instance(kubectl_resource_type, name, raise_if_not_found: true)
rescue KubernetesDeploy::Kubectl::ResourceNotFoundError
@disappeared = true if deploy_started?
@instance_data = {}
end
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#sync_debug_info(kubectl) ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 220
def sync_debug_info(kubectl)
@debug_events = fetch_events(kubectl) unless ENV[DISABLE_FETCHING_EVENT_INFO]
@debug_logs = fetch_debug_logs if print_debug_logs? && !ENV[DISABLE_FETCHING_LOG_INFO]
end
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#terminating? ⇒ Boolean
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 158
def terminating?
@instance_data.dig('metadata', 'deletionTimestamp').present?
end
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#timeout ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 71
def timeout
return timeout_override if timeout_override.present?
self.class.timeout
end
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#timeout_message ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 306
def timeout_message
STANDARD_TIMEOUT_MESSAGE
end
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#timeout_override ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 76
def timeout_override
return @timeout_override if defined?(@timeout_override)
@timeout_override = DurationParser.new(timeout_annotation).parse!.to_i
rescue DurationParser::ParsingError
@timeout_override = nil
end
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#to_kubeclient_resource ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 106
def to_kubeclient_resource
Kubeclient::Resource.new(@definition)
end
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#validate_definition(kubectl, selector: nil) ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 110
def validate_definition(kubectl, selector: nil)
@validation_errors = []
validate_selector(selector) if selector
validate_timeout_annotation
command = ["create", "-f", file_path, "--dry-run", "--output=name"]
_, err, st = kubectl.run(*command, log_failure: false, output_is_sensitive: kubectl_output_is_sensitive?)
return true if st.success?
if kubectl_output_is_sensitive?
@validation_errors << <<-EOS
Validation for #{id} failed. Detailed information is unavailable as the raw error may contain sensitive data.
EOS
else
@validation_errors << err
end
false
end
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#validation_error_msg ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 128
def validation_error_msg
@validation_errors.join("\n")
end
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#validation_failed? ⇒ Boolean
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 132
def validation_failed?
@validation_errors.present?
end
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