Class: Rollo::Commands::Services

Inherits:
Thor
  • Object
show all
Defined in:
lib/rollo/commands/services.rb

Overview

rubocop:disable Metrics/ClassLength

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.exit_on_failure? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rollo/commands/services.rb', line 12

def self.exit_on_failure?
  true
end

Instance Method Details

#contract(region, _, ecs_cluster_name, service_cluster = nil) ⇒ Object

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# File 'lib/rollo/commands/services.rb', line 128

def contract(
  region, _, ecs_cluster_name,
  service_cluster = nil
)
  batch_size = options[:batch_size]

  service_cluster ||= Rollo::Model::ServiceCluster.new(ecs_cluster_name,
                                                       region)

  say("Decreasing service instance counts by #{batch_size}...")
  with_padding do
    service_cluster.with_replica_services do |on|
      on.each_service do |service|
        say(
          "Decreasing instance count by #{batch_size} " \
          "for #{service.name}"
        )
        # rubocop:disable Lint/ShadowingOuterLocalVariable
        with_padding do
          service.decrease_instance_count_by(batch_size) do |on|
            on.prepare do |current, target|
              say(
                "Changing instance count from #{current} " \
                "to #{target}..."
              )
            end
            on.waiting_for_health do |attempt|
              say(
                'Waiting for service to reach a steady state ' \
                "(attempt #{attempt})..."
              )
            end
          end
        end
        # rubocop:enable Lint/ShadowingOuterLocalVariable
      end
    end
  end
  say('Service instance counts decreased, continuing...')
end

#expand(region, _, ecs_cluster_name, service_cluster = nil) ⇒ Object

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# File 'lib/rollo/commands/services.rb', line 42

def expand(
  region, _, ecs_cluster_name,
  service_cluster = nil
)
  batch_size = options[:batch_size]
  maximum_instances = options[:maximum_instances]
  service_start_wait_minutes = options[:startup_time]
  service_start_wait_seconds = 60 * service_start_wait_minutes

  service_cluster ||= Rollo::Model::ServiceCluster.new(ecs_cluster_name,
                                                       region)

  say("Increasing service instance counts by #{batch_size}...")
  # rubocop:disable Metrics/BlockLength
  with_padding do
    service_cluster.with_replica_services do |on|
      on.start do |services|
        say(
          'Service cluster contains services:' \
          "\n\t\t[#{services.map(&:name).join(",\n\t\t ")}]"
        )
      end
      on.each_service do |service|
        say(
          "Increasing instance count by #{batch_size} " \
          "for #{service.name}"
        )
        # rubocop:disable Lint/ShadowingOuterLocalVariable
        with_padding do
          service.increase_instance_count_by(
            batch_size, maximum_instances: maximum_instances
          ) do |on|
            on.prepare do |current, target|
              say(
                "Changing instance count from #{current} " \
                "to #{target}..."
              )
            end
            on.waiting_for_health do |attempt|
              say(
                'Waiting for service to reach a steady state ' \
                "(attempt #{attempt})..."
              )
            end
          end
        end
        # rubocop:enable Lint/ShadowingOuterLocalVariable
      end
    end
  end
  # rubocop:enable Metrics/BlockLength
  say(
    "Waiting #{service_start_wait_minutes} minute(s) for " \
    'services to finish starting...'
  )
  with_padding do
    sleep(service_start_wait_seconds)
    say(
      "Waited #{service_start_wait_minutes} minute(s). " \
      'Continuing...'
    )
  end
  say('Service instance counts increased, continuing...')
end