check_mcollective.rb

#!/usr/bin/env ruby
require 'rubygems'
require 'mcollective'

class MCollectiveCheck
  NAGIOS_CRITICAL = 2
  NAGIOS_WARNING  = 1
  NAGIOS_OK       = 0

  include MCollective::RPC

  attr_accessor :hosts
  def initialize(hosts=[])
    @hosts = hosts
  end

  def run
    raise 'invalid host definition, must be an Array' unless @hosts.kind_of?(Array)
    options = rpcoptions
    options[:timeout] = 1
    client = rpcclient('rpcutil', :options => options)

    # By specifying the nodes directly, we use direct addressing
    # this will cause an error if one of the hosts do not respond
    client.discover :nodes => @hosts
    client.progress = false
    client.ping

    if client.stats.noresponsefrom.empty?
      puts "OK: #{@hosts.join(', ')} responded properly"
      return NAGIOS_OK
    else
      puts "CRITICAL: No response from hosts: #{client.stats.noresponsefrom.join(', ')}"
      return NAGIOS_CRITICAL
    end
  end
end

def usage
  puts "usage: #{$0} host1 [host2 .. hostN]"
  exit 1
end

usage if ARGV.size == 0
check = MCollectiveCheck.new(ARGV)
exit check.run