Module: EcsDeploy::AutoScaler

Defined in:
lib/ecs_deploy/auto_scaler.rb,
lib/ecs_deploy/auto_scaler/config_base.rb,
lib/ecs_deploy/auto_scaler/service_config.rb,
lib/ecs_deploy/auto_scaler/trigger_config.rb,
lib/ecs_deploy/auto_scaler/instance_drainer.rb,
lib/ecs_deploy/auto_scaler/cluster_resource_manager.rb,
lib/ecs_deploy/auto_scaler/auto_scaling_group_config.rb,
lib/ecs_deploy/auto_scaler/spot_fleet_request_config.rb

Defined Under Namespace

Modules: ConfigBase Classes: AutoScalingGroupConfig, ClusterResourceManager, InstanceDrainer, ServiceConfig, SpotFleetRequestConfig, TriggerConfig

Constant Summary collapse

SERVICE_CONFIG_ATTRIBUTES = 
%i(name cluster region step max_task_count min_task_count idle_time scheduled_min_task_count cooldown_time_for_reach_max upscale_triggers downscale_triggers desired_count required_capacity)

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.error_logger ⇒ Object (readonly)

Returns the value of attribute error_logger.



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# File 'lib/ecs_deploy/auto_scaler.rb', line 13

def error_logger
  @error_logger
end

.logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/ecs_deploy/auto_scaler.rb', line 13

def logger
  @logger
end

Class Method Details

.auto_scaling_group_configs ⇒ Object 



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# File 'lib/ecs_deploy/auto_scaler.rb', line 100

def auto_scaling_group_configs
  @auto_scaling_group_configs ||= (@config["auto_scaling_groups"] || []).each.with_object({}) do |c, configs|
    configs[c["name"]] ||= {}
    if configs[c["name"]][c["region"]]
      raise "Duplicate entry in auto_scaling_groups (name: #{c["name"]}, region: #{c["region"]})"
    end
    configs[c["name"]][c["region"]] = AutoScalingGroupConfig.new(c, @logger)
  end.values.flat_map(&:values)
end

.load_config(yaml_path) ⇒ Object 



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# File 'lib/ecs_deploy/auto_scaler.rb', line 70

def load_config(yaml_path)
  @config = YAML.load_file(yaml_path)
  @polling_interval = @config["polling_interval"] || 30
  if @config["services"]
    @error_logger&.warn('"services" property in root-level is deprecated. Please define it in "auto_scaling_groups" property or "spot_fleet_requests" property.')
    @config.delete("services").each do |svc|
      if svc["auto_scaling_group_name"] && svc["spot_fleet_request_id"]
        raise "You can specify only one of 'auto_scaling_group_name' or 'spot_fleet_request_name'"
      end

      svc_region = svc.delete("region")
      if svc["auto_scaling_group_name"]
        asg_name = svc.delete("auto_scaling_group_name")
        asg = @config["auto_scaling_groups"].find { |g| g["region"] == svc_region && g["name"] == asg_name }
        asg["services"] ||= []
        asg["services"] << svc
        asg["cluster"] = svc.delete("cluster")
      end

      if svc["spot_fleet_request_id"]
        sfr_id = svc.delete("spot_fleet_request_id")
        sfr = @config["spot_fleet_requests"].find { |r| r["region"] == svc_region && r["id"] == sfr_id }
        sfr["services"] ||= []
        sfr["services"] << svc
        sfr["cluster"] = svc.delete("cluster")
      end
    end
  end
end

.main_loop(cluster_scaling_config) ⇒ Object 



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# File 'lib/ecs_deploy/auto_scaler.rb', line 49

def main_loop(cluster_scaling_config)
  loop_with_polling_interval("loop of #{cluster_scaling_config.name}") do
    ths = cluster_scaling_config.service_configs.map do |service_config|
      Thread.new(service_config) do |s|
        @logger.debug "Start service scaling of #{s.name}"
        s.adjust_desired_count(cluster_scaling_config.cluster_resource_manager)
      end
    end
    ths.each { |th| th.abort_on_exception = true }

    ths.each(&:join)

    @logger.debug "Start cluster scaling of #{cluster_scaling_config.name}"

    required_capacity = cluster_scaling_config.service_configs.sum { |s| s.desired_count * s.required_capacity }
    cluster_scaling_config.update_desired_capacity(required_capacity)

    cluster_scaling_config.service_configs.each(&:wait_until_desired_count_updated)
  end
end

.run(yaml_path, log_file = nil, error_log_file = nil) ⇒ Object 



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# File 'lib/ecs_deploy/auto_scaler.rb', line 15

def run(yaml_path, log_file = nil, error_log_file = nil)
  @enable_auto_scaling = true
  setup_signal_handlers
  @logger = Logger.new(log_file || STDOUT)
  @logger.level = Logger.const_get(ENV["ECS_AUTO_SCALER_LOG_LEVEL"].upcase) if ENV["ECS_AUTO_SCALER_LOG_LEVEL"]
  STDOUT.sync = true unless log_file
  @error_logger = Logger.new(error_log_file || STDERR)
  @error_logger.level = Logger.const_get(ENV["ECS_AUTO_SCALER_LOG_LEVEL"].upcase) if ENV["ECS_AUTO_SCALER_LOG_LEVEL"]
  STDERR.sync = true unless error_log_file
  load_config(yaml_path)

  ths = (auto_scaling_group_configs + spot_fleet_request_configs).map do |cluster_scaling_config|
    Thread.new(cluster_scaling_config, &method(:main_loop)).tap { |th| th.abort_on_exception = true }
  end

  if @config["spot_instance_intrp_warns_queue_urls"]
    drainer = EcsDeploy::AutoScaler::InstanceDrainer.new(
      auto_scaling_group_configs: auto_scaling_group_configs,
      spot_fleet_request_configs: spot_fleet_request_configs,
      logger: logger,
    )
    polling_ths = @config["spot_instance_intrp_warns_queue_urls"].map do |queue_url|
      Thread.new(queue_url) do |url|
        drainer.poll_spot_instance_interruption_warnings(url)
      end.tap { |th| th.abort_on_exception = true }
    end
  end

  ths.each(&:join)

  drainer&.stop
  polling_ths&.each(&:join)
end

.spot_fleet_request_configs ⇒ Object 



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# File 'lib/ecs_deploy/auto_scaler.rb', line 110

def spot_fleet_request_configs
  @spot_fleet_request_configs ||= (@config["spot_fleet_requests"] || []).each.with_object({}) do |c, configs|
    configs[c["id"]] ||= {}
    if configs[c["id"]][c["region"]]
      raise "Duplicate entry in spot_fleet_requests (id: #{c["id"]}, region: #{c["region"]})"
    end
    configs[c["id"]][c["region"]] = SpotFleetRequestConfig.new(c, @logger)
  end.values.flat_map(&:values)
end