class LogStash::Outputs::Nagios

Constants

NAGIOS_CRITICAL
NAGIOS_WARN

Public Class Methods

new(url, config={}, &block) click to toggle source
Calls superclass method LogStash::Outputs::Base::new
# File lib/logstash/outputs/nagios.rb, line 9
def initialize(url, config={}, &block)
  super

  if @url.path == "" or @url.path == "/"
    @cmdfile = "/var/lib/nagios3/rw/nagios.cmd"
  else
    @cmdfile = @url.path
  end
end

Public Instance Methods

receive(event) click to toggle source
# File lib/logstash/outputs/nagios.rb, line 25
def receive(event)
  if !File.exists?(@cmdfile)
    @logger.warn(["Skipping nagios output; command file is missing",
                 {"cmdfile" => @cmdfile, "missed_event" => event}])
    return
  end

  # TODO(petef): if nagios_host/nagios_service both have more than one
  # value, send multiple alerts. They will have to match up together by
  # array indexes (host/service combos) and the arrays must be the same
  # length.

  host = event.fields["nagios_host"]
  if !host
    @logger.warn(["Skipping nagios output; nagios_host field is missing",
                 {"missed_event" => event}])
    return
  end

  service = event.fields["nagios_service"]
  if !service
    @logger.warn(["Skipping nagios output; nagios_service field is missing",
                 {"missed_event" => event}])
    return
  end

  annotation = event.fields["nagios_annotation"]
  level = NAGIOS_CRITICAL
  if event.fields["nagios_level"] and event.fields["nagios_level"][0].downcase == "warn"
    level = NAGIOS_WARN
  end

  cmd = "[#{Time.now.to_i}] PROCESS_SERVICE_CHECK_RESULT;#{host[0]};#{service[0]};#{level};"
  if annotation
    cmd += "#{annotation[0]}: "
  end
  cmd += "#{event.source}: "
  # In the multi-line case, escape the newlines for the nagios command file
  cmd += event.message.gsub("\n", "\\n")

  @logger.debug({"cmdfile" => @cmdfile, "nagios_command" => cmd})
  begin
    File.open(@cmdfile, "a") do |f|
      f.puts cmd
    end
  rescue
    @logger.warn(["Skipping nagios output; error writing to command file",
                 {"error" => $!, "cmdfile" => @cmdfile,
                  "missed_event" => event}])
  end
end
register() click to toggle source
# File lib/logstash/outputs/nagios.rb, line 20
def register
  # nothing to do
end