Class: LogStash::Inputs::Ganglia

Inherits:
Base
  • Object
show all
Defined in:
lib/logstash/inputs/ganglia.rb

Overview

Read ganglia packets from the network via udp

Instance Method Summary collapse

Constructor Details

#initialize(params) ⇒ Ganglia

Returns a new instance of Ganglia.



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# File 'lib/logstash/inputs/ganglia.rb', line 24

def initialize(params)
  super
  BasicSocket.do_not_reverse_lookup = true
end

Instance Method Details

#parse_packet(packet) ⇒ Object 



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# File 'lib/logstash/inputs/ganglia.rb', line 98

def parse_packet(packet)
  gmonpacket=GmonPacket.new(packet)
  if gmonpacket.meta?
    # Extract the metadata from the packet
    meta=gmonpacket.parse_metadata
    # Add it to the global metadata of this connection
    @metadata[meta['name']]=meta

    # We are ignoring meta events for putting things on the queue
    @logger.debug("received a meta packet", @metadata)
    return nil
  elsif gmonpacket.data?
    data=gmonpacket.parse_data(@metadata)

    # Check if it was a valid data request
    return nil unless data
    props={ "program" => "ganglia", "log_host" => data["hostname"],
            "val" => data["val"] }
    %w{dmax tmax slope type units name}.each do |info|
      props[info] = @metadata[data["name"]][info]
    end
    return LogStash::Event.new(props)
  else
    # Skipping unknown packet types
    return nil
  end
end

#register ⇒ Object 



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# File 'lib/logstash/inputs/ganglia.rb', line 30

def register
end

#run(output_queue) ⇒ Object 



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# File 'lib/logstash/inputs/ganglia.rb', line 34

def run(output_queue)
  begin
    udp_listener(output_queue)
  rescue => e
    if !stop?
      @logger.warn("ganglia udp listener died",
                   :address => "#{@host}:#{@port}", :exception => e,
      :backtrace => e.backtrace)
      Stud.stoppable_sleep(5) { stop? }
      retry
    end
  end # begin
end

#stop ⇒ Object 



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# File 'lib/logstash/inputs/ganglia.rb', line 85

def stop
  close_udp
end