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man: note that templated surviving units need a drop-in for their slice

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As reported on the mailing list, this is non-obvious, so document it.

https://lists.freedesktop.org/archives/systemd-devel/2024-June/050351.html
This commit is contained in:
Luca Boccassi
2024-06-06 22:10:23 +01:00
committed by Luca Boccassi
parent 3541e5e2a9
commit d91c7c91bf
1 changed files with 11 additions and 0 deletions
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11
man/systemd-soft-reboot.service.xml
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@@ -122,6 +122,17 @@ Type=oneshot
ExecStart=sleep infinity</programlisting>
</listitem>
<listitem><para>On top of the above, templated units also need a drop-in configuration file for their
slice, as they are by default ran inside a slice named after the non-templated part of the unit. For
example, for a <filename>foo@test.service</filename> instance configured with the default slice, a
drop-in <filename>system-foo.slice.d/survive.conf</filename> is required, with content:</para>
<programlisting>[Unit]
SurviveFinalKillSignal=yes
IgnoreOnIsolate=yes
DefaultDependencies=no</programlisting>
</listitem>
<listitem><para>File system mounts may remain mounted during the transition, and complex storage
attached, if configured to remain until the very end of the shutdown process. (Also achieved via
<varname>DefaultDependencies=no</varname>, and by avoiding