Class: KubernetesDeploy::Pod::Container

Inherits:
Object
  • Object
show all
Defined in:
lib/kubernetes-deploy/kubernetes_resource/pod.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(definition, init_container: false) ⇒ Container

Returns a new instance of Container.



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# File 'lib/kubernetes-deploy/kubernetes_resource/pod.rb', line 176

def initialize(definition, init_container: false)
  @init_container = init_container
  @name = definition["name"]
  @image = definition["image"]
  @http_probe_location = definition.dig("readinessProbe", "httpGet", "path")
  @exec_probe_command = definition.dig("readinessProbe", "exec", "command")
  @status = {}
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/kubernetes-deploy/kubernetes_resource/pod.rb', line 174

def name
  @name
end

Instance Method Details

#doom_reason ⇒ Object 



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# File 'lib/kubernetes-deploy/kubernetes_resource/pod.rb', line 189

def doom_reason
  limbo_reason = @status.dig("state", "waiting", "reason")
  limbo_message = @status.dig("state", "waiting", "message")

  if @status.dig("lastState", "terminated", "reason") == "ContainerCannotRun"
    # ref: https://github.com/kubernetes/kubernetes/blob/562e721ece8a16e05c7e7d6bdd6334c910733ab2/pkg/kubelet/dockershim/docker_container.go#L353
    exit_code = @status.dig('lastState', 'terminated', 'exitCode')
    "Failed to start (exit #{exit_code}): #{@status.dig('lastState', 'terminated', 'message')}"
  elsif @status.dig("state", "terminated", "reason") == "ContainerCannotRun"
    exit_code = @status.dig('state', 'terminated', 'exitCode')
    "Failed to start (exit #{exit_code}): #{@status.dig('state', 'terminated', 'message')}"
  elsif limbo_reason == "CrashLoopBackOff"
    exit_code = @status.dig('lastState', 'terminated', 'exitCode')
    "Crashing repeatedly (exit #{exit_code}). See logs for more information."
  elsif %w(ImagePullBackOff ErrImagePull).include?(limbo_reason) &&
    limbo_message.match(/(?:not found)|(?:back-off)/i)
    "Failed to pull image #{@image}. "\
    "Did you wait for it to be built and pushed to the registry before deploying?"
  elsif limbo_message == "Generate Container Config Failed"
    # reason/message are backwards in <1.8.0 (next condition used by 1.8.0+)
    # Fixed by https://github.com/kubernetes/kubernetes/commit/df41787b1a3f51b73fb6db8a2203f0a7c7c92931
    "Failed to generate container configuration: #{limbo_reason}"
  elsif limbo_reason == "CreateContainerConfigError"
    "Failed to generate container configuration: #{limbo_message}"
  end
end

#doomed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kubernetes-deploy/kubernetes_resource/pod.rb', line 185

def doomed?
  doom_reason.present?
end

#init_container? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kubernetes-deploy/kubernetes_resource/pod.rb', line 232

def init_container?
  @init_container
end

#readiness_fail_reason ⇒ Object 



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# File 'lib/kubernetes-deploy/kubernetes_resource/pod.rb', line 216

def readiness_fail_reason
  return if ready? || init_container?
  return unless (@http_probe_location || @exec_probe_command).present?

  yellow_name = ColorizedString.new(name).yellow
  if @http_probe_location
    "> #{yellow_name} must respond with a good status code at '#{@http_probe_location}'"
  elsif @exec_probe_command
    "> #{yellow_name} must exit 0 from the following command: '#{@exec_probe_command.join(' ')}'"
  end
end

#ready? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kubernetes-deploy/kubernetes_resource/pod.rb', line 228

def ready?
  @status['ready'] == true
end

#reset_status ⇒ Object 



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# File 'lib/kubernetes-deploy/kubernetes_resource/pod.rb', line 240

def reset_status
  @status = {}
end

#update_status(data) ⇒ Object 



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# File 'lib/kubernetes-deploy/kubernetes_resource/pod.rb', line 236

def update_status(data)
  @status = data || {}
end