Re: [gentoo-user] How does OpenRC know if a service is crashed?

[Manuel Mommertz]

Am Donnerstag, 2. August 2018, 11:32:23 CEST schrieb Alarig Le Lay:
> Hi,
>
> Some times ago, I wrote a basic init script for a service I?m running
> but that is not in the tree.
> It?s just a python script behind a reverse-proxy.
>
> bulbizarre ~ # cat /etc/init.d/paste-py
> #!/sbin/openrc-run
> # Copyright 1999-2015 Gentoo Foundation
> # Distributed under the terms of the GNU General Public License v2
> # $Header: $
>
> #depend() {
> #
> #}
>
> start() {
>         start-stop-daemon --start --user pastepy --exec paste-py.sh --name
> paste-py eend $?
> }
>
> stop() {
>         kill $(cat /opt/paste-py/paste.pid)
> }
> bulbizarre ~ # cat $(which paste-py.sh)
> #!/bin/sh
>
> port="$(grep port /opt/paste-py/paste-py.conf | cut -d '=' -f 2)"
> addr="$(grep addr /opt/paste-py/paste-py.conf | cut -d '=' -f 2)"
>
> cd /opt/paste-py
> source bin/activate
> ./daemonize.py --port=${port} --addr=${addr}
> bulbizarre ~ # cat /opt/paste-py/paste.pid
> 9480
> bulbizarre ~ # ps aux | grep 9480
> root       493  0.0  0.0  11440   924 pts/3    S+   11:14   0:00 grep
> --colour=auto 9480 pastepy   9480  0.0  0.4 113548 16848 ?        S
> 08:05   0:00 python ./daemonize.py --port=8087 --addr=127.0.0.1
>
> So, the process is running (and responding), but OpenRC shows it as
> crashed
>
> bulbizarre ~ # rc-status | grep crash
>  paste-py                                                          [
> crashed  ]
>
> What do I have to change?
>
> Thanks,

Hey Alarig,

I suggest to read the man-page of start-stop-daemon to get an detailed idea of 
how it works.

You use '--name paste-py' which tells start-stop-daemon to look for a process 
named 'paste-py' to see if it is still running, when you request the status. 
As your shell-script runs daemonize.py as the last step and then quits itself, 
there is no process with the name 'paste-py' and therefore the reported status 
is 'crashed'.
Use '--pidfile /opt/paste-py/paste.pid' instead. With this, the status is 
determined by reading the pid from the file and then looking if this pid is 
still running.

Greets
Manuel