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man: document special considerations when mixing templated service units and DefaultDependencies=no 

Fixes #2189.
This commit is contained in:
Lennart Poettering 2016-01-29 16:26:55 +01:00
parent a5a5f03382
commit ae0a5fb1e1
2 changed files with 16 additions and 0 deletions
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6
man/systemd.resource-control.xml
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@ -459,6 +459,12 @@
this setting is the parent slice. Since the name of a slice
unit implies the parent slice, it is hence redundant to ever
set this parameter directly for slice units.</para>
<para>Special care should be taken when relying on the default slice assignment in templated service units
that have <varname>DefaultDependencies=no</varname> set, see
<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>, section
"Automatic Dependencies" for details.</para>
</listitem>
</varlistentry>

10
man/systemd.service.xml
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@ -113,6 +113,16 @@
involved with early boot or late system shutdown should disable
this option.</para>
<para>Instanced service units (i.e. service units with an <literal>@</literal> in their name) are assigned by
default a per-template slice unit (see
<citerefentry><refentrytitle>systemd.slice</refentrytitle><manvolnum>5</manvolnum></citerefentry>), named after the
template unit, containing all instances of the specific template. This slice is normally stopped at shutdown,
together with all template instances. If that is not desired, set <varname>DefaultDependencies=no</varname> in the
template unit, and either define your own per-template slice unit file that also sets
<varname>DefaultDependencies=no</varname>, or set <varname>Slice=system.slice</varname> (or another suitable slice)
in the template unit. Also see
<citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
<para>Additional implicit dependencies may be added as result of
execution and resource control parameters as documented in
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>