[systemd-devel] emergency shutdown, don't wait for timeouts

[Germano Massullo]

Il 27/12/20 15:40, Andrei Borzenkov ha scritto:
> 27.12.2020 17:00, Reindl Harald пишет:
>>
>> Am 27.12.20 um 14:43 schrieb Andrei Borzenkov:
>>> 27.12.2020 16:26, Germano Massullo пишет:
>>>> Good day, I recently joined apcupsd (APC UPS Power Control Daemon)
>>>> package maintainers on Fedora/CentOS/RHEL.
>>>> After a power failure, apcupsd shuts down the system with a command
>>>> almost identical to
>>>> shutdown -h -H now
>>>> Usually when you normally shutdown your system, you may notice certain
>>>> services taking too much time to terminate and triggering a timeout
>>>> value before systemd forces them to terminate. I would like to ask if
>>>> there is a way to force the system to shutdown without waiting for these
>>>> timeouts in case an emergency like a power failure.
>>>>
>>> You can force shutdown without going via normal stop of services.
>>>
>>> systemctl --force poweroff
>> but that is only a part of the solution because normally most services
>> don't take long to stop and they should be normally stopped whenever
>> possible
>>
>> the real solution would a option to reduce the timeouts
>>
>> systemctl --timeout=5 poweroff
> sytemctl does not have this option.

Being able to set a timeout would have been the best option since, from
man systemctl, "poweroff" section:
"[...]If combined with --force, shutdown of all running services is
skipped, however all processes are killed[...]"
so we could avoid killing services if not strictly necessary...