Class: Wakame::AgentMonitor

Inherits:
Object
  • Object
show all
Includes:
ThreadImmutable, Manager
Defined in:
lib/wakame/master.rb

Instance Attribute Summary

Attributes included from Manager

#master

Instance Method Summary collapse

Methods included from ThreadImmutable

#bind_thread, included, #target_thread, #target_thread?, #thread_check

Methods included from Manager

#reload, #start, #stop

Instance Method Details

#agent_pool ⇒ Object 



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# File 'lib/wakame/master.rb', line 158

def agent_pool
  Service::AgentPool.instance
end

#init ⇒ Object 



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# File 'lib/wakame/master.rb', line 34

def init
  @agent_timeout = 31.to_f
  @agent_kill_timeout = @agent_timeout * 2
  @gc_period = 20.to_f

  Service::AgentPool.reset

  # GC event trigger for agent timer & status
  @agent_timeout_timer = EM::PeriodicTimer.new(@gc_period) {
    StatusDB.pass {
      #Wakame.log.debug("Started agent GC : agents.size=#{@registered_agents.size}")
      [self.agent_pool.group_active.keys, self.agent_pool.group_observed.keys].flatten.uniq.each { |agent_id|
        agent = Service::Agent.find(agent_id)
        #next if agent.status == Service::Agent::STATUS_OFFLINE
        
        diff_time = Time.now - agent.last_ping_at_time
        #Wakame.log.debug "AgentMonitor GC : #{agent_id}: #{diff_time}"
        if diff_time > @agent_timeout.to_f
          agent.update_status(Service::Agent::STATUS_TIMEOUT)
        end
        
        if diff_time > @agent_kill_timeout.to_f
          agent_pool.unregister(agent)
        end
      }
      
      #Wakame.log.debug("Finished agent GC")
    }
  }
  
  
  master.add_subscriber('registry') { |data|
    data = eval(data)
    
    StatusDB.pass {
      agent_id = data[:agent_id]
      
      agent = agent_pool.create_or_find(agent_id)
      
      case data[:class_type]
      when 'Wakame::Packets::Register'
        agent.root_path = data[:root_path]
        agent.vm_attr = data[:attrs]
        agent.save
        agent_pool.register(agent)
      when 'Wakame::Packets::UnRegister'
        agent_pool.unregister(agent)
      end
    }

  }

  master.add_subscriber('ping') { |data|
    ping = eval(data)
    # Skip the old ping responses before starting master node.
    next if Time.parse(ping[:responded_at]) < master.started_at

    # Variable update function for the common members
    set_report_values = proc { |agent|
      agent.last_ping_at = ping[:responded_at]
      agent.vm_attr = ping[:attrs]

      agent.renew_reported_services(ping[:services])
      agent.save

      agent.update_status(Service::Agent::STATUS_ONLINE)
    }
    
    StatusDB.pass { 
      agent = Service::Agent.find(ping[:agent_id])
      if agent.nil?
        agent = Service::Agent.new
        agent.id = ping[:agent_id]
        
        set_report_values.call(agent)

        agent_pool.register_as_observed(agent)
      else
        set_report_values.call(agent)
      end
      
      EventDispatcher.fire_event(Event::AgentPong.new(agent))
    }
  }
  
  master.add_subscriber('agent_event') { |data|
    response = eval(data)
    StatusDB.pass {
      case response[:class_type]
      when 'Wakame::Packets::StatusCheckResult'
        svc_inst = Service::ServiceInstance.find(response[:svc_id])
        if svc_inst
          svc_inst.monitor_status = response[:status]
          svc_inst.save
        else
          Wakame.log.error("#{self.class}: Unknown service ID: #{response[:svc_id]}")
        end
      when 'Wakame::Packets::ServiceStatusChanged'
        svc_inst = Service::ServiceInstance.find(response[:svc_id])
        if svc_inst
          response_time = Time.parse(response[:responded_at])
          svc_inst.update_status(response[:new_status], response_time, response[:fail_message])
        end
      when 'Wakame::Packets::ActorResponse'
        case response[:status]
        when Actor::STATUS_RUNNING
          EventDispatcher.fire_event(Event::ActorProgress.new(response[:agent_id], response[:token], 0))
        when Actor::STATUS_FAILED
          EventDispatcher.fire_event(Event::ActorComplete.new(response[:agent_id], response[:token], response[:status], nil))
        else
          EventDispatcher.fire_event(Event::ActorComplete.new(response[:agent_id], response[:token], response[:status], response[:opts][:return_value]))
        end
      else
        Wakame.log.warn("#{self.class}: Unhandled agent response: #{response[:class_type]}")
      end
    }
  }

end

#terminate ⇒ Object 



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# File 'lib/wakame/master.rb', line 154

def terminate
  @agent_timeout_timer.cancel
end