supervisord stopping child processes

Question

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 h

Answer 1

The following article has an in-depth discussion of the problem:

http://veithen.github.io/2014/11/16/sigterm-propagation.html

Answer 2

Doing the following early in the main bash script called by supervisord fixed the problem for me:

trap "kill -- -$$" EXIT

This kills the entire process group when the main script exits, such as when it is killed by supervisord.

Answer 3

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

Answer 4

You can also use priorities in /conf.d/your-configuration.conf file. 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.

Answer 5

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:

[program:some_django]
 command=python manage.py runserver
 directory=/dir/to/app
 stopasgroup=true

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:

• supervisor_3.0a8 does not work.
• supervisor_3.0b2-1 works as expected.

Answer 6

try this supervisor program config:

stopasgroup=true
killasgroup=true
stopsignal=INT