Class: EcsDeploy::AutoScaler::ServiceConfig

Inherits:
Struct
  • Object
show all
Includes:
ConfigBase
Defined in:
lib/ecs_deploy/auto_scaler/service_config.rb

Constant Summary collapse

MAX_DESCRIBABLE_TASK_COUNT = 
100

Instance Method Summary collapse

Methods included from ConfigBase

#logger

Constructor Details

#initialize(attributes = {}, logger) ⇒ ServiceConfig

Returns a new instance of ServiceConfig.



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# File 'lib/ecs_deploy/auto_scaler/service_config.rb', line 14

def initialize(attributes = {}, logger)
  super
  self.idle_time ||= 60
  self.max_task_count = Array(max_task_count)
  self.upscale_triggers = upscale_triggers.to_a.map do |t|
    TriggerConfig.new({"region" => region, "step" => step}.merge(t), logger)
  end
  self.downscale_triggers = downscale_triggers.to_a.map do |t|
    TriggerConfig.new({"region" => region, "step" => step}.merge(t), logger)
  end
  self.max_task_count.sort!
  self.desired_count = fetch_service.desired_count
  self.required_capacity ||= 1
  @reach_max_at = nil
  @last_updated_at = nil
  @logger = logger
end

Instance Method Details

#adjust_desired_count(cluster_resource_manager) ⇒ Object 



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# File 'lib/ecs_deploy/auto_scaler/service_config.rb', line 32

def adjust_desired_count(cluster_resource_manager)
  if idle?
    @logger.debug "#{name} is idling"
    return
  end

  difference = 0
  upscale_triggers.each do |trigger|
    next if difference >= trigger.step

    if trigger.match?
      @logger.info "#{log_prefix} Firing upscale trigger by #{trigger.alarm_name} #{trigger.state}"
      difference = trigger.step
    end
  end

  if desired_count > current_min_task_count
    downscale_triggers.each do |trigger|
      next if difference > 0 && !trigger.prioritized_over_upscale_triggers?
      next unless trigger.match?

      @logger.info "#{log_prefix} Firing downscale trigger by #{trigger.alarm_name} #{trigger.state}"
      difference = [difference, -trigger.step].min
    end
  end

  if current_min_task_count > desired_count + difference
    difference = current_min_task_count - desired_count
  end

  if difference >= 0 && desired_count > max_task_count.max
    difference = max_task_count.max - desired_count
  end

  if difference != 0
    update_service(difference, cluster_resource_manager)
  end
end

#wait_until_desired_count_updated ⇒ Object 



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# File 'lib/ecs_deploy/auto_scaler/service_config.rb', line 71

def wait_until_desired_count_updated
  @increase_desired_count_thread&.join
rescue => e
  AutoScaler.error_logger.warn("`#{__method__}': #{e} (#{e.class})")
ensure
  @increase_desired_count_thread = nil
end