class LogStash::Outputs::Opentsdb

This output allows you to pull metrics from your logs and ship them to opentsdb. Opentsdb is an open source tool for storing and graphing metrics.

Public Instance Methods

connect() click to toggle source
# File lib/logstash/outputs/opentsdb.rb, line 43
def connect
  # TODO(sissel): Test error cases. Catch exceptions. Find fortune and glory.
  begin
    @socket = TCPSocket.new(@host, @port)
  rescue Errno::ECONNREFUSED => e
    @logger.warn("Connection refused to opentsdb server, sleeping...",
                 :host => @host, :port => @port)
    sleep(2)
    retry
  end
end
receive(event) click to toggle source
# File lib/logstash/outputs/opentsdb.rb, line 56
def receive(event)
  return unless output?(event)

  # Opentsdb message format: put metric timestamp value tagname=tagvalue tag2=value2\n

  # Catch exceptions like ECONNRESET and friends, reconnect on failure.
  begin
    name = metrics[0]
    value = metrics[1]
    tags = metrics[2..-1]

    # The first part of the message
    message = ['put',
               event.sprintf(name),
               event.sprintf("%{+%s}"),
               event.sprintf(value),
    ].join(" ")

    # If we have have tags we need to add it to the message
    event_tags = []
    unless tags.nil?
      Hash[*tags.flatten].each do |tag_name,tag_value|
        # Interprete variables if neccesary
        real_tag_name = event.sprintf(tag_name)
        real_tag_value =  event.sprintf(tag_value)
        event_tags << [real_tag_name , real_tag_value ].join('=')
      end
      message+=' '+event_tags.join(' ')
    end

    # TODO(sissel): Test error cases. Catch exceptions. Find fortune and glory.
    begin
      @socket.puts(message)
    rescue Errno::EPIPE, Errno::ECONNRESET => e
      @logger.warn("Connection to opentsdb server died",
                   :exception => e, :host => @host, :port => @port)
      sleep(2)
      connect
    end

    # TODO(sissel): resend on failure
    # TODO(sissel): Make 'resend on failure' tunable; sometimes it's OK to
    # drop metrics.
  end # @metrics.each
end
register() click to toggle source
# File lib/logstash/outputs/opentsdb.rb, line 39
def register
  connect
end