[systemd-devel] safe and fast shutdown/reboot

[prashantkumar dhotre]

Thanks but I want to sigkill my services only during system shutdown and
not on normal service stop 'systemctl myservice stop'.
so I can not use ' KillSignal' setting. Is there any other way ?

On Fri, Mar 16, 2018 at 9:23 AM, Zeal Jagannatha <zealjagannatha at gmail.com>
wrote:

> I think it would be better for the services you define to specifically
> define their own `KillSignal` so you can control how they shutdown.
> https://www.freedesktop.org/software/systemd/man/systemd.
> kill.html#KillSignal=
>
> It's may not be safe for all the services on the machine to be shut down
> with SIGKILL, so you should avoid using '--force' unless you know that
> everything running on the system is safe to shutdown with SIGKILL.
>
> On Thu, Mar 15, 2018 at 8:43 PM prashantkumar dhotre <
> prashantkumardhotre at gmail.com> wrote:
>
>> Hi
>> I see that default reboot/systemctl reboot command issues SIGTERM to my
>> apps and hence it is doing graceful stop of apps and this may take some
>> time and hence shutdown time may be little longer.
>>
>> I am looking for safe and fastest shutdown/reboot method.
>>
>>
>> a) It is OK if my apps are stopped ungracefully during shutdown .(app
>> should not start automatically again after they are killed/stopped during
>> shutdown)
>>
>> b)  file system and such system level stuff needs to be cleanly shut down
>>
>> 1) From my research, I see that 'systemctl reboot --force' is the one I
>> can use.
>> I understand that this command sends SIGKILL to my apps.
>> So this satisfies both (a) and (b) and hence this command should be used
>> to reboot faster.
>> Could you please confirm ?
>> If this is not right method, please comment on which method to use.
>>
>> 2) Also is there a way to limit SIGKILL to only my apps when I do ' 'systemctl
>> reboot --force'
>> so that rest of the system level services still get stopped gracefully
>>
>> 3) If  'systemctl reboot --force' is correct command to use in my case,
>> then during shutdown , will my apps get restarted
>> due to 'Restart'/'StartLimitBurst'/'StartLimitInterval' settings in
>> service file ? I dont want my apps to get restarted if they are
>> stopped/killed during system shutdown
>>
>>
>> Thanks
>>
>>
>>
>> _______________________________________________
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>> systemd-devel at lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/systemd-devel
>>
>
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