Am 27.05.2016 um 09:40 schrieb Reindl Harald:
Am 27.05.2016 um 06:48 schrieb Thomas Güttler:
OK, I understand that I need different tool to restart a service
if a check-script fails.
In my case the check script will be custom code. But the restart stuff
is very general and reusable:
Step1: Call check-script
Step2: If exit 0 (meaning service is working), then wait N seconds, got
to Step1
Step3: Service is not working: Send process the signal TERM_SIGNAL
(should be configurable)
Step4: Wait N seconds until process terminated.
Step5: If process did terminate, restart the service. Wait, go to Step1
Step6: Process did not terminate: Wait N seconds, Send signal KILL
Step7: Wait until OS has cleaned up the service
Step8: Restart the service, Wait, got to Step1
I could implement these steps myself, but I am lazy. I guess this
has already been done several times before.
Any tool recommendation?
that are just a few lines code in any programming language
Yes, but I nevertheless I prefer to reuse.
your logic is way too complex - just SIGTERM and SIGKILL the service and a
proper configured systemd-unit with
"Restart=always" will automatically restarted when you shoot the main process
in the head
That's a reason why I like to reuse. I am just a small sheep,
and more intelligent sheep already solved many edge cases I don't see
at the first sight.
also; if the service was *manually* stopped it will keep stopped because the
kill-calls won't do anything
_________________________
[root@testserver:~]$ cat /etc/systemd/system/monitor-dbmail-lmtpd.service
> ..
Thank you for the code snippet.
If I don't find anything I can install via package manager, then I will
take this as a start.
Regards,
Thomas
--
Thomas Guettler http://www.thomas-guettler.de/
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