在生产中监控ruby后台进程(如Resque)的正确方法

时间:2013-03-19 01:48:27

标签: ruby-on-rails centos capistrano god

我一直在努力解决这个问题,启动resque和resque调度程序等后台进程的正确方法是什么?使用上帝是否过度杀伤?

目前我正试图让上帝工作,但我不确定* .god conf文件是否应该在应用程序的目录中或其他地方。

这就是我使用的:

config
 |- app.god
 |- God
   |- resque.god
   |- resque_scheduler.god

# config/god/resque.god
rails_env   = ENV['RAILS_ENV']  || raise(ArgumentError, "RAILS_ENV not defined")
rails_root  = ENV['RAILS_ROOT'] || File.expand_path(File.join(File.dirname(__FILE__), '..', '..'))
num_workers = rails_env == 'production' ? 5 : 2

num_workers.times do |num|
  God.watch do |w|
    w.dir      = "#{rails_root}"
    w.name     = "resque-#{num}"
    w.group    = 'resque'
    w.interval = 30.seconds
    w.env      = {"QUEUE"=>"*", "RAILS_ENV"=>rails_env, "BUNDLE_GEMFILE"=>"#{rails_root}/Gemfile"}
    w.start    = "/usr/bin/rake -f #{rails_root}/Rakefile environment resque:work"
    w.log      = "#{rails_root}/log/resque-scheduler.log"

    ... start/stop methods  ...
  end
end

有root用户和MyApp用户。 MyApp用户的应用位于:/home/myapp/apps/myapp_production/current

我使用的上帝卡皮斯特拉诺食谱是:

# config/deploy.rb
after "deploy:restart", "god:restart"

namespace :god do
  def try_killing_resque_workers
    run "pkill -3 -f resque"
  rescue
    nil
  end

  desc "Restart God gracefully"
  task "restart", :roles => :app do
    god_config_path = File.join(release_path, 'config', 'app.god')
    begin
      # Throws an exception if god is not running.
      run "cd #{release_path}; bundle exec god status && RAILS_ENV=#{rails_env} RAILS_ROOT=#{release_path} bundle exec god load #{god_config_path} && bundle exec god start resque"

      # Kill resque processes and have god restart them with the newly loaded config.
      try_killing_resque_workers
    rescue => ex
      # god is dead, workers should be as well, but who knows.
      try_killing_resque_workers

      # Start god.
      run "cd #{release_path}; RAILS_ENV=#{rails_env} bundle exec god -c #{god_config_path}"
    end
  end
end

当我部署时,我得到“服务器不可用(或者您无权访问它)”

奇怪的是,当我甚至以root身份登录并运行god status时,它只返回任何内容,但如果我运行god --version则返回版本。

任何人都知道为什么?

1 个答案:

答案 0 :(得分:1)

您是否设置了init.d脚本? 你有神跑吗?

/etc/init.d/god status

您可以尝试手动启动它

/usr/bin/god -c /etc/god/conf.god -D

并检查日志