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Docker 容器中一项服务崩溃后 Supervisord 不会退出

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Docker 容器中一项服务崩溃后 Supervisord 不会退出

我有以下supervisord配置：

[supervisord]
nodaemon=true
logfile=NONE

[program:service1]
command=/usr/sbin/service1
user=someone
autostart=true
autorestart=true
startsecs=30

[program:service2]
command=/usr/sbin/service2
user=root
autostart=true
autorestart=true
startsecs=30

我在 docker 容器中使用此配置。问题是，如果 service1 崩溃，容器会继续运行，就好像一切正​​常一样。我怎样才能改变这种行为，以便在一个服务崩溃时整个容器退出？

答案1

本次 SF 问答标题为：如果退出时结果为 0，如何退出所有主管进程听起来像你正在寻找的东西。

笔记：这种方法使用一个事件监听器。

例子#1

[supervisord]
nodaemon=true
logfile=NONE

[program:service1]
command=/usr/sbin/service1
user=someone
autostart=true
;autorestart=true               ; disabled
;startsecs=30                   ; disabled
process_name=service1

[program:service2]
command=/usr/sbin/service2
user=root
autostart=true
;autorestart=true               ; disabled
;startsecs=30                   ; disabled
process_name=service2

[eventlistener:service1_exit]
command=kill.py
process_name=service1
events=PROCESS_STATE_EXITED

[eventlistener:service2_exit]
command=kill.py
process_name=service2
events=PROCESS_STATE_EXITED

剧本kill.py：

$ cat kill.py
#!/usr/bin/env python
import sys
import os
import signal

def write_stdout(s):
   sys.stdout.write(s)
   sys.stdout.flush()
def write_stderr(s):
   sys.stderr.write(s)
   sys.stderr.flush()
def main():
   while 1:
       write_stdout('READY\n')
       line = sys.stdin.readline()
       write_stdout('This line kills supervisor: ' + line);
       try:
               pidfile = open('/var/run/supervisord.pid','r')
               pid = int(pidfile.readline());
               os.kill(pid, signal.SIGQUIT)
       except Exception as e:
               write_stdout('Could not kill supervisor: ' + e.strerror + '\n')
       write_stdout('RESULT 2\nOK')
if __name__ == '__main__':
   main()
   import sys
main issue I forgot to point to **process_name**

例子#2

此示例显示了一种更简化的方法，它仍然使用事件侦听器，但它显示了如何执行上面所示的相同操作，但只使用单个侦听器和 shell 脚本。

执行查杀操作的 shell 脚本：

$ cat stop-supervisor.sh
#!/bin/bash

printf "READY\n";

while read line; do
  echo "Processing Event: $line" >&2;
  kill -3 $(cat "/var/run/supervisord.pid")
done < /dev/stdin

Supervisord.conf：

$ cat supervisord.conf
[supervisord]
nodaemon=true
loglevel=debug
logfile=/var/log/supervisor/supervisord.log
pidfile=/var/run/supervisord.pid
childlogdir=/var/log/supervisor

[program:service1]
command=/usr/sbin/service1
user=someone
autostart=true
;autorestart=true               ; disabled
;startsecs=30                   ; disabled
process_name=service1

[program:service2]
command=/usr/sbin/service2
user=root
autostart=true
;autorestart=true               ; disabled
;startsecs=30                   ; disabled
process_name=service2

[eventlistener:processes]
command=stop-supervisor.sh
events=PROCESS_STATE_STOPPED, PROCESS_STATE_EXITED, PROCESS_STATE_FATAL

参考

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