Supervisord - NGINX stop OSError - nginx

Question

I ran into an error when trying to stop NGINX using supervisord.
To start NGINX without error from supervisord I had to prepend sudo to the nginx command in supervisord.conf:
[supervisord]
[program:nginx]
command=sudo nginx -c %(ENV_PWD)s/configs/nginx.conf
When I run this:
$ supervisord -n
2017-02-09 12:26:06,371 INFO RPC interface 'supervisor' initialized
2017-02-09 12:26:06,372 INFO RPC interface 'supervisor' initialized
2017-02-09 12:26:06,372 CRIT Server 'unix_http_server' running without any HTTP authentication checking
2017-02-09 12:26:06,373 INFO supervisord started with pid 22152
2017-02-09 12:26:07,379 INFO spawned: 'nginx' with pid 22155
2017-02-09 12:26:08,384 INFO success: nginx entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
^C # SIGINT: Should stop all processes
2017-02-09 13:59:08,550 WARN received SIGINT indicating exit request
2017-02-09 13:59:08,551 CRIT unknown problem killing nginx (22155):Traceback (most recent call last):
File "/Users/ocervell/.virtualenvs/ndc-v3.3/lib/python2.7/site-packages/supervisor/process.py", line 432, in kill
options.kill(pid, sig)
File "/Users/ocervell/.virtualenvs/ndc-v3.3/lib/python2.7/site-packages/supervisor/options.py", line 1239, in kill
os.kill(pid, signal)
OSError: [Errno 1] Operation not permitted
Same when using supervisorctl to stop the process:
$ supervisorctl stop nginx
FAILED: unknown problem killing nginx (22321):Traceback (most recent call last):
File "/Users/ocervell/.virtualenvs/ndc-v3.3/lib/python2.7/site-packages/supervisor/process.py", line 432, in kill
options.kill(pid, sig)
File "/Users/ocervell/.virtualenvs/ndc-v3.3/lib/python2.7/site-packages/supervisor/options.py", line 1239, in kill
os.kill(pid, signal)
OSError: [Errno 1] Operation not permitted
Is there a workaround for this ?

Answer 1

If a process created by supervisord creates its own child processes, supervisord cannot kill them.
...
The pidproxy program is put into your configuration’s $BINDIR when supervisor is installed (it is a “console script”).[1]
So what you have to do is changing your supervisord configuration like this:
[program:nginx]
command=/path/to/pidproxy /path/to/nginx-pidfile sudo nginx -c %(ENV_PWD)s/configs/nginx.conf
This may not work either, since the nginx process is create by sudo. But let's try it first.