Question

我想在部署过程中使用Beanstalkd。这个想法类似于IGN使用的想法（https://github.com/ign/brood）。在任何给定的时间我可能想触发两个客户端下载最新的代码并重启Apache。是否可以让多个工作者（每个客户端一个）处理同一个队列？作为一种解决方法，我可以为每个客户端创建一个队列。

Answer 1

每个客户端的特定队列，用于该客户端的命令。让他们全部听取自己的队列，并根据需要向尽可能多的客户端发送简单的“RESTART”消息。

我有一个启动作业的bash脚本，并使其保持运行执行实际的重启。你的脚本只需要

删除'RESTART'消息（否则下次会收到相同的消息）
exit(90);脚本

返回值由Bash脚本获取，并执行操作。

#!/bin/bash

# runBeanstalkd-worker.sh

# a shell script that keeps looping until an exit code is given
# if it does an exit(0), restart after a second - or if it's a declared error
# if we've restarted in a planned fashion, we don't bother with any pause
# and for one particular code, exit the script entirely.
# The numbers 97, 98, 99 must match what is returned from the PHP script

nice php -q -f ./cli-beanstalk-worker.php -- $@
ERR=$?

## Possibilities
# 90    - restart apache
# 97    - planned pause/restart
# 98    - planned restart
# 99    - planned stop, exit.
# 0     - unplanned restart (as returned by "exit;")
#        - Anything else is also unplanned paused/restart

# 90    - restart apache
if [ $ERR -eq 90 ]
then
   service apache restart
   sleep 5;
   exec $0 $@;
fi

if [ $ERR -eq 97 ]
then
   # a planned pause, then restart
   echo "97: PLANNED_PAUSE - wait 1";
   sleep 1;
   exec $0 $@;
fi

####   other actions, like planned-restart, or shutdown

# unplanned exit, pause, and restart
echo "unplanned restart: err:" $ERR;
echo "sleeping for 1 sec"
sleep 1

exec $0 $@

Beanstalkd - 访问同一队列的多个worker

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