Class: Dapp::Kube::Kubernetes::Manager::Container

Inherits:
Base
  • Object
show all
Defined in:
lib/dapp/kube/kubernetes/manager/container.rb

Instance Attribute Summary collapse

Attributes inherited from Base

#dapp, #name

Instance Method Summary collapse

Constructor Details

#initialize(dapp, name, pod_manager) ⇒ Container

Returns a new instance of Container.



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# File 'lib/dapp/kube/kubernetes/manager/container.rb', line 7

def initialize(dapp, name, pod_manager)
  super(dapp, name)

  @pod_manager = pod_manager
  @processed_containers_ids = []
  @processed_log_till_time = nil
  @processed_log_timestamps = Set.new
end

Instance Attribute Details

#pod_manager ⇒ Object (readonly)

Returns the value of attribute pod_manager.



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# File 'lib/dapp/kube/kubernetes/manager/container.rb', line 5

def pod_manager
  @pod_manager
end

Instance Method Details

#done? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dapp/kube/kubernetes/manager/container.rb', line 89

def done?
  pod = Kubernetes::Client::Resource::Pod.new(dapp.kubernetes.pod(pod_manager.name))
  container_state, container_state_data = pod.container_state(name)
  if container_state == 'terminated'
    failed = (container_state_data['exitCode'].to_i != 0)
    return true if pod.restart_policy == 'Never'
    return true if not failed and pod.restart_policy == 'OnFailure'
  end

  return false
end

#watch_till_terminated! ⇒ Object 



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# File 'lib/dapp/kube/kubernetes/manager/container.rb', line 16

def watch_till_terminated!
  pod = Kubernetes::Client::Resource::Pod.new(dapp.kubernetes.pod(pod_manager.name))
  _, container_state_data = pod.container_state(name)
  return if @processed_containers_ids.include? container_state_data['containerID']

  pod_manager.wait_till_launched!

  pod = Kubernetes::Client::Resource::Pod.new(dapp.kubernetes.pod(pod_manager.name))
  container_state, container_state_data = pod.container_state(name)

  dapp.log_process("Watch pod's '#{pod_manager.name}' container '#{name}' log") do
    loop do
      pod = Kubernetes::Client::Resource::Pod.new(dapp.kubernetes.pod(pod_manager.name))
      container_state, container_state_data = pod.container_state(name)

      if container_state == "waiting"
        if container_state_data["reason"] == "RunContainerError"
          raise Kubernetes::Error::Default, code: :container_stuck, data: {
            state_reason: container_state_data["reason"],
            state_message: container_state_data["message"],
            state: container_state,
            pod_name: pod_manager.name,
            container_name: name
          }
        else
          sleep 0.1
          next
        end
      end

      chunk_lines_by_time = {}
      begin
        chunk_lines_by_time = dapp.kubernetes.pod_log(pod_manager.name, container: name, timestamps: true, sinceTime: @processed_log_till_time)
          .lines
          .map(&:strip)
          .map do |line|
            timestamp, _, data = line.partition(' ')
            [timestamp, data]
          end
          .reject {|timestamp, _| @processed_log_timestamps.include? timestamp}
      rescue Kubernetes::Client::Error::Pod::ContainerCreating, Kubernetes::Client::Error::Pod::PodInitializing
        sleep 0.1
        next
      rescue Kubernetes::Client::Error::Base => err
        dapp.log_warning("#{dapp.log_time}Error while fetching pod's #{pod_manager.name} logs: #{err.message}", stream: dapp.service_stream)
        break
      end

      chunk_lines_by_time.each do |timestamp, data|
        dapp.log("[#{timestamp}] #{data}")
        @processed_log_timestamps.add timestamp
      end

      if container_state == 'terminated'
        failed = (container_state_data['exitCode'].to_i != 0)

        dapp.log_warning("".tap do |msg|
          msg << "Pod's '#{pod_manager.name}' container '#{name}' has been terminated unsuccessfuly: "
          msg << container_state_data.to_s
        end) if failed

        @processed_containers_ids << container_state_data['containerID']

        break
      end

      @processed_log_till_time = chunk_lines_by_time.last.first if chunk_lines_by_time.any?

      sleep 0.1 if chunk_lines_by_time.empty?
    end
  end # log_process
end