上帝停止救援工人耙子

Question

我在生产网站上使用 Resque。

当我部署时，我希望 GOD 停止所有工作人员，然后重新启动它们，因为有时我们会更改类的代码并重新排队失败的作业。

问题是，当我执行 god stop resque 时，耙子实际上并没有停止，工作人员仍然活着并使用旧代码，这给我带来了各种各样的问题。

即使我执行“上帝终止”，它也不会杀死工人。

现在，我正在使用 shell 脚本来杀死工作人员，但由于我有不止一台服务器，因此在所有生产服务器上进行操作非常痛苦。

这是我的上帝配置文件：

rails_env   = ENV['RAILS_ENV']  || "production"
rails_root  = ENV['RAILS_ROOT'] || "/mnt/data-store/html/gogobot/current"
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 = 2.minutes
    w.env      = {"QUEUE"=>"duplicate_merging,facebook_wall_posts,generic,mailer,notifications,realtime,scoring_system,signup,social_graph_facebook,social_graph_foursquare,social_graph_twitter,user_info,user_score", "RAILS_ENV"=>rails_env, "PIDFILE" => "#{rails_root}/tmp/resque_#{w}.pid"}
    w.pid_file = "#{rails_root}/tmp/resque_#{w}.pid"
    w.start    = "cd #{rails_root}/ && rake environment resque:work QUEUE=duplicate_merging,facebook_wall_posts,generic,mailer,notifications,realtime,scoring_system,signup,social_graph_facebook,social_graph_foursquare,social_graph_twitter,user_info,user_score RAILS_ENV=#{rails_env}"
    w.log      = "#{rails_root}/log/resque_god.log"

    w.uid = 'root'
    w.gid = 'root'

    # restart if memory gets too high
    w.transition(:up, :restart) do |on|
      on.condition(:memory_usage) do |c|
        c.above = 350.megabytes
        c.times = 2
      end
    end

    # determine the state on startup
    w.transition(:init, { true => :up, false => :start }) do |on|
      on.condition(:process_running) do |c|
        c.running = true
      end
    end

    # determine when process has finished starting
    w.transition([:start, :restart], :up) do |on|
      on.condition(:process_running) do |c|
        c.running = true
        c.interval = 5.seconds
      end

      # failsafe
      on.condition(:tries) do |c|
        c.times = 5
        c.transition = :start
        c.interval = 5.seconds
      end
    end

    # start if process is not running
    w.transition(:up, :start) do |on|
      on.condition(:process_running) do |c|
        c.running = false
      end
    end
  end
end

1.times do |num|
  God.watch do |w|
    w.name     = "dj-#{num}"
    w.group    = 'dj'
    w.interval = 30.seconds
    w.start    = "cd #{rails_root} && rake jobs:work"

    w.uid = 'root'
    w.gid = 'root'

    # retart if memory gets too high
    w.transition(:up, :restart) do |on|
      on.condition(:memory_usage) do |c|
        c.above = 300.megabytes
        c.times = 2
      end
    end

    # determine the state on startup
    w.transition(:init, { true => :up, false => :start }) do |on|
      on.condition(:process_running) do |c|
        c.running = true
      end
    end

    # determine when process has finished starting
    w.transition([:start, :restart], :up) do |on|
      on.condition(:process_running) do |c|
        c.running = true
        c.interval = 5.seconds
      end

      # failsafe
      on.condition(:tries) do |c|
        c.times = 5
        c.transition = :start
        c.interval = 5.seconds
      end
    end

    # start if process is not running
    w.transition(:up, :start) do |on|
      on.condition(:process_running) do |c|
        c.running = false
      end
    end
  end
end

对于如何使用 GOD 停止 rake 作业，我将不胜感激。

谢谢。

Answer 1

解决方案是向进程发送 SIGQUIT
例如你可以运行

god signal resque SIGQUIT