resque

#!/usr/bin/env ruby
# Cloudkick plugin for monitoring Resque <http://github.com/defunkt/resque>
#
# USAGE
#
# The script assume you're running Redis on localhost on the standard Redis
# port, 6379. To connect to a different host set the REDIS_URI environment
# variable.
#
# We don't actually install this script directly into the plugin folder.
# Instead, we keep it inside our app at script/cloudkick-resque. The actual
# plugin that the agent runs looks something like this:
#
#   $ cat /usr/lib/cloudkick-agent/plugins/resque
#   #!/bin/sh
#   export REDIS_URI=ec2-50-16-42-174.compute-1.amazonaws.com:6379
#   cd /data/app/current && bundle exec script/cloudkick-resque
#
# You can also specify the Redis URI via arguments:
# https://support.cloudkick.com/Creating_a_Plugin#Arguments
#
# AUTHOR  Simon Rozet <http://github.com/sr>
# COPYING WTFPL <http://sam.zoy.org/wtfpl/>

require "resque"

if uri = ARGV.first
  Resque.redis = uri
elsif uri = ENV["REDIS_URI"]
  Resque.redis = uri
end

workers  = Resque.workers
total    = workers.size
idling   = workers.select { |w| w.idle? }.size
working  = Resque.working.reject { |w| w.idle? }.size
busyness = (working.to_f / total) * 100

info      = Resque.info
failed    = info[:failed]
processed = info[:processed]
queues    = info[:queues]

if busyness == 100
  puts "status err out of workers"
elsif busyness >= 60
  puts "status err backed up #{idling}/#{total} free workers"
elsif busyness >= 40
  puts "status warn #{idling}/#{total} free workers"
else
  puts "status ok #{idling}/#{total} free workers"
end

puts "metric working int #{working}"
puts "metric idling int #{idling}"
puts "metric processed gauge #{processed}"
puts "metric failed gauge #{failed}"
puts "metric queues int #{queues}"