Class: Rollo::Commands::Services

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

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 9

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 102

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

  service_cluster = 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}")
        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
      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 34

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

  say("Increasing service instance counts by #{batch_size}...")
  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}")
        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
      end
    end
  end
  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