Ruby守护进程和bluepill监控

Question

我正在尝试创建一个自定义守护进程，让它每隔60秒运行一次，并使用bluepill启动/停止和监控它。

有人能告诉我怎么做更容易吗?或者你能告诉我我做错了什么吗？

目前，bluepill正在启动守护进程，以便它运行，但似乎不知道它正在运行，因为持续尝试停止和启动它。

下面是我的.pill文件中的代码

app.process("get_dropboxes") do |process|

   process.working_dir = RAILS_ROOT
   process.pid_file = File.join(RAILS_ROOT, "tmp", "pids", "get_dropbox.pid")  
   process.start_command = "/usr/bin/env RAILS_ENV=#{RAILS_ENV} bundle exec lib/daemons/get_dropbox_ctl start"
   process.stop_command = "/usr/bin/env RAILS_ENV=#{RAILS_ENV} bundle exec lib/daemons/get_dropbox_ctl stop"

   process.start_grace_time = 10.seconds
   process.stop_grace_time = 10.seconds
   process.restart_grace_time = 10.seconds

   process.checks :cpu_usage, :every => 30.seconds, :below => 20, :times => [3,5]
   process.checks :mem_usage, :every => 30.seconds, :below => 350.megabytes, :times => [3,5]

 end

这是我的get_dropbox_ctl文件

#!/usr/bin/env ruby
require 'rubygems'
require "daemons"
require 'yaml'
require 'erb'

gem 'activesupport', '>=3.0.0'
require 'active_support'

# For some reason, ActiveSupport 3.0.0 doesn't load.
# Load needed extension directly for now.
require "active_support/core_ext/object"
require "active_support/core_ext/hash"

options = YAML.load(
  ERB.new(
    IO.read(
      File.dirname(__FILE__) + "/../../config/daemons.yml"
  )).result).with_indifferent_access

options[:dir_mode] = options[:dir_mode].to_sym

Daemons.run File.dirname(__FILE__) + "/get_dropbox.rb", options

这是我的get_dropbox.rb文件

#!/usr/bin/env ruby

# You might want to change this
ENV["RAILS_ENV"] ||= "production"

require 'net/pop'
require File.dirname(__FILE__) + "/../../config/application"
Rails.application.require_environment!

$running = true
Signal.trap("TERM") do 
  $running = false
end

while($running) do


  # do stuff .......

  sleep 60
end

我得到的日志

[2011-07-13T16:55:00.464202 #32257]  WARN -- : [domain.com:get_dropboxes] pid_file /var/www/domain.com/current/tmp/pids/get_dropbox.pid does not exist or cannot be read
W, [2011-07-13T16:55:00.464315 #32257]  WARN -- : [domain.com:get_dropboxes] pid_file /var/www/domain.com/current/tmp/pids/get_dropbox.pid does not exist or cannot be read
W, [2011-07-13T16:55:00.464505 #32257]  WARN -- : [domain.com:get_dropboxes] Executing start command: /usr/bin/env RAILS_ENV=production bundle exec lib/daemons/get_dropbox_ctl start
I, [2011-07-13T16:55:01.602210 #32257]  INFO -- : [domain.com:get_dropboxes] Going from down => starting

当然还有比这更简单的方法吗？

Answer 1

我不确定这是否是您要找的，但据我所知，您可以跳过守护进程文件，使用bluepill。只要您指定一个pidfile，您就可以设置process.daemonize = true，它将为您创建一个守护进程。