notify_ghe_cpu_load_to_ikachan.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'net/http'
require 'string-irc'

channels        = %w( #test )
status_file     = '/tmp/.ghe-overload'
pcpu_threshold  = 80

idle = `snmpget -v 2c -c "public" ghe.example.jp .1.3.6.1.4.1.2021.11.11.0 | awk -F" " '{ print $4 }'`.strip
pcpu = 100 - idle.to_i

if pcpu < pcpu_threshold && File.exists?(status_file)
  message = StringIrc.new('GHE 落ち着きました').green
  `rm #{status_file}`
elsif pcpu >= pcpu_threshold && ! File.exists?('/tmp/.ghe-overload')
  message = StringIrc.new('GHE がいっぱいいっぱいです（CPU 高負荷）').red
  `touch #{status_file}`
end

channels.each do |channel|
  if message
    Net::HTTP.start('ikachan.example.jp', 4979) {|http|
      body = "channel=#{channel}"
      res = http.post('/join', body)

      body = "channel=#{channel}&message=#{message}"
      res = http.post('/notice', body)
    }
  end
end