Class: KubernetesDeploy::DeployTask

Inherits:
Object
  • Object
show all
Extended by:
StatsD::MeasureMethods
Defined in:
lib/kubernetes-deploy/deploy_task.rb

Constant Summary collapse

PROTECTED_NAMESPACES = 
%w(
  default
  kube-system
  kube-public
)

Instance Method Summary collapse

Methods included from StatsD::MeasureMethods

measure_method

Constructor Details

#initialize(namespace:, context:, current_sha:, logger: nil, kubectl_instance: nil, bindings: {}, max_watch_seconds: nil, selector: nil, template_paths: [], template_dir: nil) ⇒ DeployTask

Returns a new instance of DeployTask.



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# File 'lib/kubernetes-deploy/deploy_task.rb', line 107

def initialize(namespace:, context:, current_sha:, logger: nil, kubectl_instance: nil, bindings: {},
  max_watch_seconds: nil, selector: nil, template_paths: [], template_dir: nil)
  template_dir = File.expand_path(template_dir) if template_dir
  template_paths = (template_paths.map { |path| File.expand_path(path) } << template_dir).compact

  @logger = logger || KubernetesDeploy::FormattedLogger.build(namespace, context)
  @template_sets = TemplateSets.from_dirs_and_files(paths: template_paths, logger: @logger)
  @task_config = KubernetesDeploy::TaskConfig.new(context, namespace, @logger)
  @bindings = bindings
  @namespace = namespace
  @namespace_tags = []
  @context = context
  @current_sha = current_sha
  @kubectl = kubectl_instance
  @max_watch_seconds = max_watch_seconds
  @selector = selector
end

Instance Method Details

#predeploy_sequence ⇒ Object

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– managed by services core/v1/PersistentVolumeClaim – would delete data core/v1/ReplicationController – superseded by deployments/replicasets



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# File 'lib/kubernetes-deploy/deploy_task.rb', line 60

def predeploy_sequence
  before_crs = %w(
    ResourceQuota
    NetworkPolicy
  )
  after_crs = %w(
    ConfigMap
    PersistentVolumeClaim
    ServiceAccount
    Role
    RoleBinding
    Secret
    Pod
  )

  before_crs + cluster_resource_discoverer.crds.select(&:predeployed?).map(&:kind) + after_crs
end

#prune_whitelist ⇒ Object 



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# File 'lib/kubernetes-deploy/deploy_task.rb', line 78

def prune_whitelist
  wl = %w(
    core/v1/ConfigMap
    core/v1/Pod
    core/v1/Service
    core/v1/ResourceQuota
    core/v1/Secret
    core/v1/ServiceAccount
    core/v1/PodTemplate
    batch/v1/Job
    extensions/v1beta1/ReplicaSet
    extensions/v1beta1/DaemonSet
    extensions/v1beta1/Deployment
    extensions/v1beta1/Ingress
    networking.k8s.io/v1/NetworkPolicy
    apps/v1beta1/StatefulSet
    autoscaling/v1/HorizontalPodAutoscaler
    policy/v1beta1/PodDisruptionBudget
    batch/v1beta1/CronJob
    rbac.authorization.k8s.io/v1/Role
    rbac.authorization.k8s.io/v1/RoleBinding
  )
  wl + cluster_resource_discoverer.crds.select(&:prunable?).map(&:group_version_kind)
end

#run(*args) ⇒ Object 



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# File 'lib/kubernetes-deploy/deploy_task.rb', line 125

def run(*args)
  run!(*args)
  true
rescue FatalDeploymentError
  false
end

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



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# File 'lib/kubernetes-deploy/deploy_task.rb', line 132

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)
  resources = discover_resources
  validate_resources(resources)

  @logger.phase_heading("Checking initial resource statuses")
  check_initial_status(resources)

  if deploy_has_priority_resources?(resources)
    @logger.phase_heading("Predeploying priority resources")
    predeploy_priority_resources(resources)
  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
    deploy_all_resources(resources, prune: prune, verify: true)
    failed_resources = resources.reject(&:deploy_succeeded?)
    success = failed_resources.empty?
    if !success && failed_resources.all?(&:deploy_timed_out?)
      raise DeploymentTimeoutError
    end
    raise FatalDeploymentError unless success
  else
    deploy_all_resources(resources, prune: prune, verify: false)
    @logger.summary.add_action("deployed #{resources.length} #{'resource'.pluralize(resources.length)}")
    warning = "      Deploy result verification is disabled for this deploy.\n      This means the desired changes were communicated to Kubernetes, but the deploy did not make sure they actually succeeded.\n    MSG\n    @logger.summary.add_paragraph(ColorizedString.new(warning).yellow)\n  end\n  StatsD.event(\"Deployment of \#{@namespace} succeeded\",\n    \"Successfully deployed all \#{@namespace} resources to \#{@context}\",\n    alert_type: \"success\", tags: statsd_tags << \"status:success\")\n  StatsD.distribution('all_resources.duration', StatsD.duration(start), tags: statsd_tags << \"status:success\")\n  @logger.print_summary(:success)\nrescue DeploymentTimeoutError\n  @logger.print_summary(:timed_out)\n  StatsD.event(\"Deployment of \#{@namespace} timed out\",\n    \"One or more \#{@namespace} resources failed to deploy to \#{@context} in time\",\n    alert_type: \"error\", tags: statsd_tags << \"status:timeout\")\n  StatsD.distribution('all_resources.duration', StatsD.duration(start), tags: statsd_tags << \"status:timeout\")\n  raise\nrescue FatalDeploymentError => error\n  @logger.summary.add_action(error.message) if error.message != error.class.to_s\n  @logger.print_summary(:failure)\n  StatsD.event(\"Deployment of \#{@namespace} failed\",\n    \"One or more \#{@namespace} resources failed to deploy to \#{@context}\",\n    alert_type: \"error\", tags: statsd_tags << \"status:failed\")\n  StatsD.distribution('all_resources.duration', StatsD.duration(start), tags: statsd_tags << \"status:failed\")\n  raise\nend\n"

#server_version ⇒ Object 



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# File 'lib/kubernetes-deploy/deploy_task.rb', line 103

def server_version
  kubectl.server_version
end