ruby - 上帝启动了太多进程

Question

我有一个 god 脚本，它应该监视两个 stalker 进程。 问题是 24 小时后它启动了太多进程。

这是神脚本。

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 辅助 | 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 不会终止任何进程。

• 我已经尝试将 w.uid = "webmaster" 添加到 god 脚本中，但问题仍然存在。

• 我正在运行 god 版本 0.12.1、ruby 版本 1.9.3p286 和 stalker 版本 0.9.0。

我做错了什么？

Answer 1

似乎 god 正试图跟随 bbundle 而不是 stalk。您需要让 god 知道在哪里可以找到您要使用 w.pid_file 遵循的实际进程的 PID。如果标准 kill 无法解决问题，您可能还需要告诉它如何终止进程。为此，您可以将 w.stop_signal 用于不同的信号(如 simonmenke 所建议的那样)或将 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 将其打印到 stdout 或 god -l/var/log/god.log。