supervisor crashed docker container

[cbautista1002]

I was making changes to environment variables and to supervisord.conf and when I tried to reload supervisor (per http://stackoverflow.com/questions/16970379/environment-variables-with-supervisor) it crashed the entire docker container!

bash-4.3# supervisorctl
httpd                            RUNNING   pid 63563, uptime 0:17:50
map                              RUNNING   pid 64322, uptime 0:04:05
mysql                            STOPPED   Apr 09 10:51 PM
sshd                             RUNNING   pid 63564, uptime 0:17:50
supervisor> stop map
map: stopped
supervisor> reload
Really restart the remote supervisord process y/N? y
Restarted supervisord
supervisor> core@td-tac01 ~/tacstack $

core@td-tac01 ~/tacstack $ docker exec -it tacstack_mapappprod_1 /bin/bash
FATA[0000] Error response from daemon: Container tacstack_mapappprod_1 is not running

The last change I made was I added environment=PYTHONPATH='/home/robotframework':${PYTHONPATH} to /etc/supervisord.conf

[cbautista1002]

@jumanjiman I don't understand how its possible that I misconfigured supervisord.conf (by adding ${...}) and restarting it caused the entire docker container to crash.

When I get a chance, I'm going to try to recreate this in AWS to see if what I'm thinking is right (can supervisor crash docker?)

[jumanjiman]

can supervisor crash docker?

by docker, i assume you mean the docker daemon, not just a container.

a single process cannot crash the daemon unless you run privileged and with excess capabilities.

but supervisor, if it crashes, does take out the container.
every container has a PID 1, just like every host.

if pid 1 crashes, the container (or host) crashes.

[cbautista1002]

Oh I see. I was indeed talking about the container. So it makes sense that pid 1 crashed and the whole container crashed.