[systemd-devel] [EXT] Re: scheduling services first during shutdown/reboot

[Andrei Borzenkov]

On Fri, Feb 14, 2025 at 10:07 AM Windl, Ulrich <u.windl at ukr.de> wrote:
>
> I wonder: Can such a thing be expressed via an [install] section, too?

[Install] section does not support configuration drop-ins or explicit
ordering directives.

> Fumbling with the filesystem this way feels wrong to me, because when uninstalling such a unit, it will probably leave garbage behind (assuming that systemd collects garbage normally).
> Or is the expectation that such garbage does not harm, and the operator is expected to do the cleanup instead?
>
> Kind regards,
> Ulrich Windl
>
> > -----Original Message-----
> > From: systemd-devel <systemd-devel-bounces at lists.freedesktop.org> On
> > Behalf Of Andrei Borzenkov
> > Sent: Wednesday, February 12, 2025 6:54 PM
> > To: Olaf Hering <olaf at aepfle.de>; systemd-devel at lists.freedesktop.org
> > Subject: [EXT] Re: [systemd-devel] scheduling services first during
> > shutdown/reboot
> >
> > 12.02.2025 16:35, Olaf Hering wrote:
> > > What is the proper way to run a service as the very first unit when the
> > > system goes down? I want to run it before systemd stops active sessions
> > > with "Stopping Session N of User $user...".
> > >
> > > It seems that "After=session-N.scope" does have the desired effect,
> > > but I may have to list every possible value of N, to not miss anything.
> > >
> >
> > mkdir -p /etc/systemd/system/session-.scope.d
> > printf "[Unit]\nBefore=your-very-first.service\n" >
> > /etc/systemd/system/session-.scope.d/before.conf
> >
> > > There is nothing obvious mentioned in systemd.special.
> > >
> > >
> > > Thanks,
> > > Olaf
>