24

我有一个上帝脚本，应该关注两个跟踪进程。问题是24 小时后它启动了太多的进程。

这是神剧本。

rails_root = File.expand_path("../..", __FILE__)

2.times do |n|
  God.watch do |w|
    w.group = "app-scripts"
    w.name  = "run-#{n}"
    w.interval = 30.seconds
    w.dir      = File.dirname(__FILE__)

    w.env = {
      "BUNDLE_GEMFILE" => "#{rails_root}/Gemfile",
      "RAILS_ENV" => "production",
      "BEANSTALK_URL" => "beanstalk://127.0.0.1:54132"
    }

    w.start = "bbundle exec stalk #{File.join(rails_root, "config/jobs.rb")}"

    w.start_grace = 5.seconds
    w.stop_grace  = 5.seconds

    w.start_if do |start|
      start.condition(:process_running) { |c| c.running = false }
    end

    w.restart_if do |restart|
      restart.condition(:memory_usage) do |c|
        c.above = 200.megabytes
        c.times = [3, 5]
      end

      restart.condition(:cpu_usage) do |c|
        c.above = 95.percent
        c.times = 5
      end
    end

    w.lifecycle do |on|
      on.condition(:flapping) do |c|
        c.to_state = [:start, :restart]
        c.times = 5
        c.within = 5.minute
        c.transition = :unmonitored
        c.retry_in = 10.minutes
        c.retry_times = 5
        c.retry_within = 2.hours
      end
    end
  end
end

ps aux | grep stalk返回以下内容。

root      3178  0.2  2.7 417580 117284 ?       Sl   Oct28   2:22 ruby /opt/www/myapp/shared/bundle/ruby/1.9.1/bin/stalk /opt/www/myapp/current/config/jobs.rb
root      3179  0.2  3.3 506068 138740 ?       Sl   Oct28   2:26 ruby /opt/www/myapp/shared/bundle/ruby/1.9.1/bin/stalk /opt/www/myapp/current/config/jobs.rb
root      4588  0.2  2.9 497932 121664 ?       Sl   Oct25  16:10 ruby /opt/www/myapp/shared/bundle/ruby/1.9.1/bin/stalk /opt/www/myapp/current/config/jobs.rb
root      4794  0.2  3.0 497792 128084 ?       Sl   Oct25  15:57 ruby /opt/www/myapp/shared/bundle/ruby/1.9.1/bin/stalk /opt/www/myapp/current/config/jobs.rb
root     10391  0.2  2.8 496784 121388 ?       Sl   Oct25  15:44 ruby /opt/www/myapp/shared/bundle/ruby/1.9.1/bin/stalk /opt/www/myapp/current/config/jobs.rb
root     10392  0.2  2.8 497624 121528 ?       Sl   Oct25  15:31 ruby /opt/www/myapp/shared/bundle/ruby/1.9.1/bin/stalk /opt/www/myapp/current/config/jobs.rb
root     18874 75.0  2.0 214116 83948 ?        Rl   15:49   0:09 ruby /opt/www/myapp/shared/bundle/ruby/1.9.1/bin/stalk /opt/www/myapp/current/config/jobs.rb
root     18875 75.0  2.0 214944 84868 ?        Rl   15:49   0:09 ruby /opt/www/myapp/shared/bundle/ruby/1.9.1/bin/stalk /opt/www/myapp/current/config/jobs.rb
root     20649  0.2  2.6 410636 110012 ?       Sl   Oct28   2:44 ruby /opt/www/myapp/shared/bundle/ruby/1.9.1/bin/stalk /opt/www/myapp/current/config/jobs.rb
root     20650  0.2  3.0 439284 128996 ?       Sl   Oct28   2:47 ruby /opt/www/myapp/shared/bundle/ruby/1.9.1/bin/stalk /opt/www/myapp/current/config/jobs.rb
root     23272  0.2  2.7 414452 115772 ?       Sl   Oct28   2:44 ruby /opt/www/myapp/shared/bundle/ruby/1.9.1/bin/stalk /opt/www/myapp/current/config/jobs.rb
root     23273  0.2  2.7 417728 117152 ?       Sl   Oct28   2:44 ruby /opt/www/myapp/shared/bundle/ruby/1.9.1/bin/stalk /opt/www/myapp/current/config/jobs.rb
root     25919  0.2  3.1 436276 131876 ?       Sl   Oct28   2:28 ruby /opt/www/myapp/shared/bundle/ruby/1.9.1/bin/stalk /opt/www/myapp/current/config/jobs.rb
root     25920  0.2  3.3 503236 138676 ?       Sl   Oct28   2:29 ruby /opt/www/myapp/shared/bundle/ruby/1.9.1/bin/stalk /opt/www/myapp/current/config/jobs.rb
root     28782  0.2  2.8 431836 121108 ?       Sl   Oct25  16:58 ruby /opt/www/myapp/shared/bundle/ruby/1.9.1/bin/stalk /opt/www/myapp/current/config/jobs.rb
root     30687  0.2  2.7 415908 117008 ?       Sl   Oct28   2:39 ruby /opt/www/myapp/shared/bundle/ruby/1.9.1/bin/stalk /opt/www/myapp/current/config/jobs.rb
root     30688  0.2  2.6 476184 111844 ?       Sl   Oct28   2:37 ruby /opt/www/myapp/shared/bundle/ruby/1.9.1/bin/stalk /opt/www/myapp/current/config/jobs.rb

这是/usr/bin/bbundle脚本。

#!/usr/bin/env bash

if [[ -s "/home/webmaster/.rvm/environments/ruby-1.9.2-p320@webmaster" ]]
then
  source "/home/webmaster/.rvm/environments/ruby-1.9.2-p320@webmaster"
  bundle  "$@"
else
  echo "ERROR: Missing RVM environment file: '/home/webmaster/.rvm/environments/ruby-1.9.2-p320@webmaster'" >&2
  exit 1
fi

  • 运行sudo god stop app-scripts不会杀死任何进程。

  • 我已经尝试添加w.uid = "webmaster"到上帝脚本，但问题仍然存在。

  • 我正在运行上帝版0.12.1、红宝石版1.9.3p286和潜行者版0.9.0。

我究竟做错了什么？

4

4 回答 4

5

似乎god是试图跟随bbundle而不是stalk。您需要让god知道在哪里可以找到您想要遵循的实际进程的 PID w.pid_file。kill如果标准不能解决问题，您可能还需要告诉它如何终止进程。为此，您可以将w.stop_signal其用于不同的信号（如 simonmenke 建议的那样）或w.stop用于整个其他命令。

日志文件应该更清楚地说明正在发生的事情。调用god -D以将其打印到stdout或god -l /var/log/god.log。

于 2012-11-02T18:05:29.670 回答
2

堆栈器在收到INT信号（不是TERM信号）时停止。尝试添加停止信号：

# ...
w.stop_signal = 'INT'
# ...
于 2012-11-02T11:58:40.280 回答
1

这应该有助于解决您的问题：Monitor a Rake task with God。

简而言之，您可以在您的上帝配置中存储对您的 PID 文件的引用：

 God.watch do |w|
   w.dir = "#{rails_root}"
   w.name = "my_task"
   w.interval = 10.seconds
   w.pid_file = "#{rails_root}/tmp/pids/#{w.name}.pid"
   w.env = {"RAILS_ENV"=>rails_env, 'PIDFILE' => w.pid_file}
   w.start = "bundle exec rake my_task &"
   ...
 end

并在您的运行过程中将您的 PID 写入此文件（在此示例中为 rake）：

 task :my_task => :environment do
   File.open(ENV['PIDFILE'], 'w') { |f| f << Process.pid } if ENV['PIDFILE']
   Model.perform_task!
 end

我们将上帝正在监视的 PID 文件的路径传递给实际被监视的进程，并将其 PID 写入该文件（然后由上帝监视）。希望这可以帮助。

于 2012-11-06T20:41:04.863 回答
1

感谢mpapis @ rvm irc，我解决了这个问题。我不得不将bbundle脚本中的第 6 行从更改bundle "$@"为exec bundle "$@".

#!/usr/bin/env bash

if [[ -s "/home/webmaster/.rvm/environments/ruby-1.9.2-p320@webmaster" ]]
then
  source "/home/webmaster/.rvm/environments/ruby-1.9.2-p320@webmaster"
  exec bundle  "$@"
else
  echo "ERROR: Missing RVM environment file: '/home/webmaster/.rvm/environments/ruby-1.9.2-p320@webmaster'" >&2
  exit 1
fi
于 2013-10-25T10:50:30.323 回答