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"
- SENSITIVE_TEMPLATE_CONTENT =
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 103
def initialize(namespace:, context:, definition:, logger:, statsd_tags: [])
@name = definition.dig("metadata", "name").to_s
@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 213
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)
validate_definition_essentials(definition)
opts = { namespace: namespace, context: context, definition: definition, logger: logger,
statsd_tags: statsd_tags }
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 52
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 64
def kind
name.demodulize
end
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.timeout ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 60
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 151
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 166
def after_sync
end
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#current_generation ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 198
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 236
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 177
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 227
def deploy_method
:apply
end
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#deploy_started? ⇒ Boolean
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 181
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 185
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 221
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 173
def disappeared?
@disappeared
end
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#exists? ⇒ Boolean
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 194
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 321
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 305
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 155
def file_path
file.path
end
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#global? ⇒ Boolean
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 400
def global?
self.class::GLOBAL
end
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#id ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 147
def id
"#{type}/#{name}"
end
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#kubectl_resource_type ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 217
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 203
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 324
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 99
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 329
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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#sensitive_template_content? ⇒ Boolean
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 336
def sensitive_template_content?
self.class::SENSITIVE_TEMPLATE_CONTENT
end
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#status ⇒ Object
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# File 'lib/kubernetes-deploy/kubernetes_resource.rb', line 209
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 159
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 231
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 169
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 87
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 317
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 92
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 117
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 121
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: sensitive_template_content?)
return true if st.success?
if sensitive_template_content?
@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 139
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 143
def validation_failed?
@validation_errors.present?
end
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