Class: Fluent::GangliaOutput

Inherits:
Output
  • Object
show all
Defined in:
lib/fluent/plugin/out_ganglia.rb

Constant Summary collapse

HOSTNAME = 
Socket.gethostname
HOSTADDR = 
IPSocket.getaddress(HOSTNAME)

Instance Method Summary collapse

Constructor Details

#initialize ⇒ GangliaOutput

Returns a new instance of GangliaOutput.



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# File 'lib/fluent/plugin/out_ganglia.rb', line 7

def initialize
  super
  require "gmetric"
  require "socket"
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_ganglia.rb', line 28

def configure(conf)
  super

  if @name_keys.nil? and @name_key_pattern.nil?
    raise Fluent::ConfigError, "missing both of name_keys and name_key_pattern"
  end
  if not @name_keys.nil? and not @name_key_pattern.nil?
    raise Fluent::ConfigError, "cannot specify both of name_keys and name_key_pattern"
  end
  if @name_keys
    @name_keys = @name_keys.split(/ *, */)
  end
  if @name_key_pattern
    @name_key_pattern = Regexp.new(@name_key_pattern)
  end
end

#emit(tag, es, chain) ⇒ Object 



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# File 'lib/fluent/plugin/out_ganglia.rb', line 86

def emit(tag, es, chain)
  if @name_keys
    es.each {|time,record|
      @name_keys.each {|name|
        if record[name]
          send(tag, name, record[name], time)
        end
      }
    }
  else # for name_key_pattern
    es.each {|time,record|
      record.keys.each {|key|
        if @name_key_pattern.match(key) and record[key]
          send(tag, key, record[key], time)
        end
      }
    }
  end
  chain.next
end

#send(tag, name, value, time) ⇒ Object 



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# File 'lib/fluent/plugin/out_ganglia.rb', line 53

def send(tag, name, value, time)
  if @add_key_prefix
    name = "#{@add_key_prefix} #{name}"
  end
  begin
    $log.debug("ganglia: #{name}: #{value}, ts: #{time}")
    gmetric = Ganglia::GMetric.pack(
      :name     => name,
      :value    => value.to_s,
      :type     => @value_type,
      :units    => @units,
      :tmax     => @tmax,
      :dmax     => @dmax,
      :title    => @title,
      :group    => @group,
      :slope    => @slope,
      :spoof    => @spoof ? 1 : 0,
      :hostname => @spoof ? @spoof : HOSTNAME,
    )
    conn = UDPSocket.new
    conn.bind(HOSTADDR, 0) if @bind_hostname
    conn.send gmetric[0], 0, @host, @port
    conn.send gmetric[1], 0, @host, @port
    conn.close
    status = true
  rescue IOError, EOFError, SystemCallError
    $log.warn "Ganglia::GMetric.send raises exception: #{$!.class}, '#{$!.message}'"
  end
  unless status
    $log.warn "failed to send to ganglia: #{@host}:#{@port}, '#{name}': #{value}"
  end
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/out_ganglia.rb', line 49

def shutdown
  super
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/out_ganglia.rb', line 45

def start
  super
end