主管停止子进程
我在 Supervisord 中面临的问题之一是，当我有一个命令又生成另一个进程时，supervisord 无法杀死它。
例如，我有一个 java 进程，正常运行时类似于
$ zkServer.sh start-foreground
$ ps -eaf | grep zk
user 30404 28280 0 09:21 pts/2 00:00:00 bash zkServer.sh start-foreground
user 30413 30404 76 09:21 pts/2 00:00:10 java -Dzookeeper.something..something
Supervisord 配置文件如下所示：
[program:zookeeper]
command=zkServer.sh start-foreground
autorestart=true
stopsignal=KILL
Supervisord 在从 supervisorctl 停止它们时，无法很好地处理具有多个子进程的此类进程。因此，当我从supervisord运行它并尝试从supervisorctl停止它时，只有顶层进程被杀死，而不是实际的java进程。
One of the problems, I face with supervisord is that when I have a command which in turn spawns another process, supervisord is not able to kill it.
For example I have a java process which when runs normally is like
$ zkServer.sh start-foreground
$ ps -eaf | grep zk
user 30404 28280 0 09:21 pts/2 00:00:00 bash zkServer.sh start-foreground
user 30413 30404 76 09:21 pts/2 00:00:10 java -Dzookeeper.something..something
The supervisord config file looks like:
[program:zookeeper]
command=zkServer.sh start-foreground
autorestart=true
stopsignal=KILL
These kind of processes which have multiple childs are not well handled by supervisord when it comes to stopping them from supervisorctl. So when I run this from the supervisord and try to stop it from supervisorctl, only the top level process gets killed but not the actual java process.
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Rick Hanlon II 在这里遇到了同样的问题：https://coderwall.com/p/4tcw7w
选项stopasgroup= true 应该在程序部分设置，以便supervisord不仅停止父进程，还停止子进程。
该示例如下：
另外，请记住，您可能有一个较旧的supervisord 包，它不具有“stopasgroup”功能。
我在 Raspberry Pi 上尝试了这些 Debian 软件包：
The same problem was encountered by Rick Hanlon II here: https://coderwall.com/p/4tcw7w
Option stopasgroup=true should be set in the program section for supervisord to stop not only the parent process but also the child processes.
The example is given as:
Also, have in mind that you may have an older package of supervisord that does not have "stopasgroup" functionality.
I tried these Debian packages on Raspberry Pi:
在由supervisord调用的主bash脚本中尽早执行以下操作解决了我的问题：
当主脚本退出时，例如当它被supervisord杀死时，这会杀死整个进程组。
Doing the following early in the main bash script called by supervisord fixed the problem for me:
This kills the entire process group when the main script exits, such as when it is killed by supervisord.
尝试这个主管程序配置：
try this supervisor program config:
Supervisord 最近添加了一项功能，可以将 SIGKILL 发送到整个进程组。它位于 github 中，但尚未正式发布。
如果进程 ID 在文件中可用，则可以使用 pid-proxy 程序
A feature was recently added to supervisord to send SIGKILL to the whole process group. It's in github but not officially released yet.
If the process id is available in a file, you can use the pid-proxy program
以下文章对该问题进行了深入讨论：
http:// veithen.github.io/2014/11/16/sigterm-propagation.html
The following article has an in-depth discussion of the problem:
http://veithen.github.io/2014/11/16/sigterm-propagation.html
您还可以在
/conf.d/your-configuration.conf文件中使用优先级。例如，如果您想先运行zookeeper，然后运行kafka，则可以指定两个程序。较低优先级意味着程序首先启动并最后停止。
You can also use priorities in
/conf.d/your-configuration.conffile. For example, if you want to run zookeeper first and then kafka you can specify two programs.Lower priority means that the program starts first and stops last.