Question

使用God（godrb.com）我正在尝试编写一个配方来启动新流程，而不管部署应用程序时现有流程的状态如何。现有流程需要长时间运行超时才能完成当前任务，但新流程应立即使用新部署的代码启动。

我现在拥有的东西在停止时设置超时300秒，但在启动新进程之前等待整整300秒。

God.watch do |w|
  w.name = "sidekiq"
  w.interval = 30.seconds
  w.start = "bash -lc 'cd /path/to/current && ./bin/sidekiq -P /path/to/shared/pids/sidekiq.pid'"
  w.stop  = "bash -lc 'kill -USR1 `cat /path/to/shared/pids/sidekiq.pid`'"
  w.stop_timeout = 300.seconds
  w.pid_file = "/path/to/shared/pids/sidekiq.pid"
  w.behavior(:clean_pid_file)
end

在这种情况下，kill -USR1告诉sidekiq完成当前任务的处理，但不再需要工作。

我想在现有工作程序上保持300秒超时，但是一旦运行kill命令就启动新进程。

Answer 1

我认为你必须定义一些过渡。

这是我的god.rb：

# I'm using Rails
rails_env = ENV['RAILS_ENV'] || 'development'
rails_root = '/path/to/current'
pid_file = "#{rails_root}/tmp/pids/sidekiq.pid"

God.watch do |w|
  w.dir = rails_root
  w.name = "sidekiq"
  w.interval = 30.seconds
  w.env = {'RAILS_ENV' => rails_env, 'BUNDLE_GEMFILE' => "#{rails_root}/Gemfile"}
  w.uid = 'deployer'
  w.gid = 'staff'

  w.start = "cd #{rails_root}; bundle exec sidekiq -e #{rails_env} -C #{rails_root}/config/sidekiq.yml -i #{i} -P #{pid_file}&"
  w.stop = "cd #{rails_root}; bundle exec sidekiqctl stop #{pid_file} 10"
  w.restart = "#{w.stop} && #{w.start}"
  w.start_grace = 15.seconds
  w.restart_grace = 15.seconds
  w.pid_file = pid_file
  w.log = "#{rails_root}/log/sidekiq.log"

  # clean pid files before start if necessary
  w.behavior(:clean_pid_file)

  # 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
    end

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

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

  # lifecycle
  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

上帝 - 在现有流程仍在停止的同时开始新流程

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