action_controller_logger.rb

module Yam
  class ActionControllerLogger < YamLogger

    def self.subscribe
      ActiveSupport::Notifications.subscribe "process_action.action_controller" do |*args|
        event = ActiveSupport::Notifications::Event.new *args
        self.structure(event.payload,event.duration, event.name)
      end
    end

  end
end

active_record_logger

module Yam
  class ActiveRecordLogger < YamLogger

    def self.subscribe
      ActiveSupport::Notifications.subscribe "sql.active_record" do |*args|
        event = ActiveSupport::Notifications::Event.new *args
        self.structure(event.payload,event.duration, event.name)
      end
    end

  end
end

yam_logger.rb

module Yam
  class YamLogger
    def self.start(**args)

      settings = {
        disable: false,
        port: 8081,
        host: 'localhost'
      }.merge(args)

      @@port = settings[:port]
      @@host = settings[:host]

      unless settings[:disable]
        Yam::YamLogger.start_socket
        Yam::YamLogger.subscribe
      end
    end

    def self.start_socket
      begin
        @@socket = TCPSocket.new @@host, @@port
      rescue Exception => e
        # IO.popen('ruby em.rb')
      end
    end

    def self.subscribe
      Yam::ActiveRecordLogger.subscribe
      Yam::ActionControllerLogger.subscribe
    end

    def self.structure(payload, duration, name)
      hash = {}
      names = name.split(".")
      node = names[1].to_sym

      payload[:duration] = duration
      hash[node] = payload

      begin
        @@socket.write(hash)
      rescue Exception => e
        # IO.popen('ruby em.rb')
      end
    end

  end
end

Формат для запросов для контроллера
{
"action_controller":{
"controller":"Front::AdCampaignsController",
"action":"index",
"params":{
"locale":"ru",
"action":"index",
"controller":"front/ad_campaigns"
},
"format":"html",
"method":"GET",
"path":"/ad_campaigns?locale=ru",
"status":200,
"view_runtime":1265.296,
"searchkick_runtime":0,
"db_runtime":156.83099999999993,
"duration":1743.555
}
}

Структура для GO

{
"request": "url",
"metrics":
{
"name": "Front::AdCampaignsController#show",
"duration": 11212,
"start": "timestamp",
"child":
[{
"name": "sql",
"duration": 111,
"start": "timestamp",
}]
},
"timestamp": "1438440347"
}