Class: KubernetesDeploy::Runner

Inherits:
Object
  • Object
show all
Includes:
KubeclientBuilder
Defined in:
lib/kubernetes-deploy/runner.rb

Constant Summary collapse

PREDEPLOY_SEQUENCE = 
%w(
  ResourceQuota
  Cloudsql
  Redis
  Memcached
  Bugsnag
  ConfigMap
  PersistentVolumeClaim
  Pod
)
PROTECTED_NAMESPACES = 
%w(
  default
  kube-system
  kube-public
)
PRUNE_WHITELIST =

Things removed from default prune whitelist at github.com/kubernetes/kubernetes/blob/0dff56b4d88ec7551084bf89028dbeebf569620e/pkg/kubectl/cmd/apply.go#L411: core/v1/Namespace – not namespaced core/v1/PersistentVolume – not namespaced core/v1/Endpoints – managed by services core/v1/PersistentVolumeClaim – would delete data core/v1/ReplicationController – superseded by deployments/replicasets extensions/v1beta1/ReplicaSet – managed by deployments core/v1/Secret – should not committed / managed by shipit

%w(
  core/v1/ConfigMap
  core/v1/Pod
  core/v1/Service
  batch/v1/Job
  extensions/v1beta1/DaemonSet
  extensions/v1beta1/Deployment
  apps/v1beta1/Deployment
  extensions/v1beta1/Ingress
  apps/v1beta1/StatefulSet
  autoscaling/v1/HorizontalPodAutoscaler
).freeze
NOT_FOUND_ERROR = 
'NotFound'

Instance Method Summary collapse

Constructor Details

#initialize(namespace:, context:, current_sha:, template_dir:, logger:, kubectl_instance: nil, bindings: {}) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/kubernetes-deploy/runner.rb', line 77

def initialize(namespace:, context:, current_sha:, template_dir:, logger:, kubectl_instance: nil, bindings: {})
  @namespace = namespace
  @context = context
  @current_sha = current_sha
  @template_dir = File.expand_path(template_dir)
  @logger = logger
  @kubectl = kubectl_instance
  @bindings = bindings
  # Max length of podname is only 63chars so try to save some room by truncating sha to 8 chars
  @id = current_sha[0...8] + "-#{SecureRandom.hex(4)}" if current_sha
end

Instance Method Details

#run(verify_result: true, allow_protected_ns: false, prune: true) ⇒ Object 



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# File 'lib/kubernetes-deploy/runner.rb', line 89

def run(verify_result: true, allow_protected_ns: false, prune: true)
  start = Time.now.utc
  @logger.reset

  @logger.phase_heading("Initializing deploy")
  validate_configuration(allow_protected_ns: allow_protected_ns, prune: prune)
  confirm_context_exists
  confirm_namespace_exists
  resources = discover_resources
  validate_definitions(resources)

  @logger.phase_heading("Checking initial resource statuses")
  KubernetesDeploy::Concurrency.split_across_threads(resources, &:sync)
  resources.each { |r| @logger.info(r.pretty_status) }

  ejson = EjsonSecretProvisioner.new(
    namespace: @namespace,
    context: @context,
    template_dir: @template_dir,
    logger: @logger,
    prune: prune,
  )
  if ejson.secret_changes_required?
    @logger.phase_heading("Deploying kubernetes secrets from #{EjsonSecretProvisioner::EJSON_SECRETS_FILE}")
    ejson.run
  end

  if deploy_has_priority_resources?(resources)
    @logger.phase_heading("Predeploying priority resources")
    start_priority_resource = Time.now.utc
    predeploy_priority_resources(resources)
    ::StatsD.measure('priority_resources.duration', StatsD.duration(start_priority_resource), tags: statsd_tags)
  end

  @logger.phase_heading("Deploying all resources")
  if PROTECTED_NAMESPACES.include?(@namespace) && prune
    raise FatalDeploymentError, "Refusing to deploy to protected namespace '#{@namespace}' with pruning enabled"
  end

  if verify_result
    start_normal_resource = Time.now.utc
    deploy_resources(resources, prune: prune, verify: true)
    ::StatsD.measure('normal_resources.duration', StatsD.duration(start_normal_resource), tags: statsd_tags)
    success = resources.all?(&:deploy_succeeded?)
  else
    deploy_resources(resources, prune: prune, verify: false)
    @logger.summary.add_action("deployed #{resources.length} #{'resource'.pluralize(resources.length)}")
    warning = <<~MSG
      Deploy result verification is disabled for this deploy.
      This means the desired changes were communicated to Kubernetes, but the deploy did not make sure they actually succeeded.
    MSG
    @logger.summary.add_paragraph(ColorizedString.new(warning).yellow)
    success = true
  end
rescue FatalDeploymentError => error
  @logger.summary.add_action(error.message)
  success = false
ensure
  @logger.print_summary(success)
  status = success ? "success" : "failed"
  ::StatsD.measure('all_resources.duration', StatsD.duration(start), tags: statsd_tags << "status:#{status}")
  success
end

#template_variables ⇒ Object 



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# File 'lib/kubernetes-deploy/runner.rb', line 153

def template_variables
  {
    'current_sha' => @current_sha,
    'deployment_id' => @id,
  }.merge(@bindings)
end