重启 Upstart 实例进程 [英] Restarting Upstart instance processes

问题描述

我正在运行一个工作程序的多个实例，如本答案所述:自动启动多个新贵实例

I am running multiple instances of a worker as described in this answer: Starting multiple upstart instances automatically

问题:我可以一次重启所有实例吗?

要开始我的工作人员，我可以:

To start my workers I can do:

initctl start my-workers

initctl start my-workers

然后我可以这样做:

initctl status worker N=1 worker (1) start/running, process 551

initctl status worker N=1 worker (1) start/running, process 551

initctl status worker N=2 worker (2) start/running, process 552

initctl status worker N=2 worker (2) start/running, process 552

有没有办法做这样的事情:

Is there a way to do something like this:

initctl restart my-workers

initctl restart my-workers

我希望能够重新启动所有实例，而不必知道有多少实例正在运行.

I would like to be able to restart all instances without having to know how many are running.

这是我的 my-workers.conf

Here is my my-workers.conf

start on stopped cloud-init
stop on shutdown

env NUM_WORKERS=4

script
  for i in `seq 1 $NUM_WORKERS`
    do
      start worker N=$i
    done
end script

和worker.conf

And worker.conf

stop on shutdown

chdir /path/to/current

respawn

instance $N

script
  exec su -c "/home/worker/.rvm/bin/rvm-shell -c 'bundle exec rake work 2>&1 >> /var/log/worker-$N.log'" worker
end script

推荐答案

在 worker.conf 中你只需要改变这一行:

In worker.conf you just need to change this line:

stop on shutdown

致:

stop on stopping my-workers

并将 my-workers.conf 更改为使用 pre-start 而不是 script:

And change my-workers.conf to use pre-start instead of script:

pre-start script
  for i in `seq 1 $NUM_WORKERS`
  do
    start worker N=$i
  done
end script

现在 my-workers 将保持状态:由于工作发生在 pre-start，my-workers 主进程不会存在，所以不会退出.stop on stop my-workers 会导致 worker 在 my-workers 停止时停止.然后当然当它再次启动时，它会再次启动工人.

Now my-workers will keep state: since the work happens in pre-start, the my-workers main process won't exist and so won't exit. stop on stopping my-workers causes the workers to stop whenever my-workers is stopped. Then of course when it starts up again it will start the workers again.

(仅供参考，stop on shutdown 什么都不做，因为 shutdown 不是系统事件.man upstart-events 用于所有定义的事件) 所以你也应该将 my-workers 更改为 stop on runlevel [06]

(FYI, stop on shutdown does nothing, as shutdown is not a system event. man upstart-events for all the defined events) so you should also change my-workers to stop on runlevel [06]

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