Class: Fluent::Plugin::PrometheusInput

Inherits:
Input
  • Object
show all
Defined in:
lib/fluent/plugin/in_prometheus.rb

Defined Under Namespace

Classes: MonitorServlet

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ PrometheusInput

Returns a new instance of PrometheusInput.



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# File 'lib/fluent/plugin/in_prometheus.rb', line 17

def initialize
  super
  @registry = ::Prometheus::Client.registry
end

Instance Attribute Details

#registry ⇒ Object (readonly)

Returns the value of attribute registry.



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# File 'lib/fluent/plugin/in_prometheus.rb', line 15

def registry
  @registry
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/in_prometheus.rb', line 22

def configure(conf)
  super
  @port += fluentd_worker_id
end

#multi_workers_ready? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/in_prometheus.rb', line 27

def multi_workers_ready?
  true
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/in_prometheus.rb', line 48

def shutdown
  if @server
    @server.shutdown
    @server = nil
  end
  super
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/in_prometheus.rb', line 31

def start
  super

  log.debug "listening prometheus http server on http://#{@bind}:#{@port}/#{@metrics_path} for worker#{fluentd_worker_id}"
  @server = WEBrick::HTTPServer.new(
    BindAddress: @bind,
    Port: @port,
    MaxClients: 5,
    Logger: WEBrick::Log.new(STDERR, WEBrick::Log::FATAL),
    AccessLog: [],
  )
  @server.mount(@metrics_path, MonitorServlet, self)
  thread_create(:in_prometheus) do
    @server.start
  end
end