Checks the specified resque queue size

check-resque-queue-size.rb

#!/usr/bin/env ruby
#
# Check the size of a resque queue
# ===
#
# Copyright 2014 Patrick Humpal <patrick@netvilla.net>
#
# Released under the same terms as Sensu (the MIT license); see LICENSE
# for details.

require 'rubygems' if RUBY_VERSION < '1.9.0'
require 'sensu-plugin/check/cli'
require 'socket'
require 'resque'
require 'resque/failure/redis'

class ResqueQueueSize < Sensu::Plugin::Check::CLI

  option :host,
    :short => "-h HOST",
    :long => "--host HOST",
    :description => "Redis host to connect to",
    :required => true

  option :port,
    :short => "-P PORT",
    :long => "--port PORT",
    :description => "Redis port to connect to",
    :default => "6379"

  option :queue,
    :description => "Resque queue",
    :short => "-q QUEUE",
    :long => "--queue QUEUE",
    :default => "resque"

  option :warn,
    :description => 'Warn if COUNT or more',
    :short => '-w COUNT',
    :long => '--warn COUNT',
    :default => 250

  option :crit,
    :description => 'Critical if COUNT or more',
    :short => '-c COUNT',
    :long => '--critical COUNT',
    :default => 500

  def run

    redis = Redis.new(:host => config[:hostname], :port => config[:port])

    Resque.redis = redis

    sz = Resque.size("#{config[:queue]}")

    output "Queue size is #{sz}"

    critical if sz >= config[:crit]
    warning if sz >= config[:warn]
    ok
  end

end