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Merge pull request #4670 from htejun/systemd-controller-on-unified-v2

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Systemd controller on unified v2
This commit is contained in:
Lennart Poettering
2017-02-23 16:23:02 +01:00
committed by GitHub
parent c07afaa5e5 0a05dcc09d
commit ecc0eab247
20 changed files with 484 additions and 319 deletions
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man/systemd.xml
+95 -53
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@@ -51,10 +51,13 @@
<refsynopsisdiv>
<cmdsynopsis>
<command>systemd <arg choice="opt" rep="repeat">OPTIONS</arg></command>
<command>systemd</command>
<arg choice="opt" rep="repeat">OPTIONS</arg>
</cmdsynopsis>
<cmdsynopsis>
<command>init <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="req">COMMAND</arg></command>
<command>init</command>
<arg choice="opt" rep="repeat">OPTIONS</arg>
<arg choice="req">COMMAND</arg>
</cmdsynopsis>
</refsynopsisdiv>
@@ -150,6 +153,7 @@
user instance. This setting may also be enabled during boot,
on the kernel command line via the
<varname>systemd.crash_vt=</varname> option, see
<!-- FIXME: there is no crash_vt command line option? -->
below.</para></listitem>
</varlistentry>
@@ -898,88 +902,91 @@
</varlistentry>
<varlistentry>
<term><varname>systemd.dump_core=</varname></term>
<term><varname>systemd.dump_core</varname></term>
<listitem><para>Takes a boolean argument. If
<option>yes</option>, the systemd manager (PID 1) dumps core
when it crashes. Otherwise, no core dump is created. Defaults
to <option>yes</option>.</para></listitem>
<listitem><para>Takes a boolean argument or enables the option if specified
without an argument. If enabled, the systemd manager (PID 1) dumps core when
it crashes. Otherwise, no core dump is created. Defaults to enabled.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>systemd.crash_chvt=</varname></term>
<term><varname>systemd.crash_chvt</varname></term>
<listitem><para>Takes a positive integer, or a boolean
argument. If a positive integer (in the range 1–63) is
specified, the system manager (PID 1) will activate the specified
virtual terminal (VT) when it crashes. Defaults to
<constant>no</constant>, meaning that no such switch is
attempted. If set to <constant>yes</constant>, the VT the
kernel messages are written to is selected.</para></listitem>
<listitem><para>Takes a positive integer, or a boolean argument. Can be also
specified without an argument, with the same effect as a positive boolean. If
a positive integer (in the range 1–63) is specified, the system manager (PID
1) will activate the specified virtual terminal (VT) when it
crashes. Defaults to disabled, meaning that no such switch is attempted. If
set to enabled, the VT the kernel messages are written to is selected.
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>systemd.crash_shell=</varname></term>
<term><varname>systemd.crash_shell</varname></term>
<listitem><para>Takes a boolean argument. If
<option>yes</option>, the system manager (PID 1) spawns a
shell when it crashes, after a 10s delay. Otherwise, no shell
is spawned. Defaults to <option>no</option>, for security
reasons, as the shell is not protected by password
<listitem><para>Takes a boolean argument or enables the option if specified
without an argument. If enabled, the system manager (PID 1) spawns a shell
when it crashes, after a 10s delay. Otherwise, no shell is spawned. Defaults
to disabled, for security reasons, as the shell is not protected by password
authentication.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>systemd.crash_reboot=</varname></term>
<term><varname>systemd.crash_reboot</varname></term>
<listitem><para>Takes a boolean argument. If
<option>yes</option>, the system manager (PID 1) will reboot
the machine automatically when it crashes, after a 10s delay.
Otherwise, the system will hang indefinitely. Defaults to
<option>no</option>, in order to avoid a reboot loop. If
combined with <varname>systemd.crash_shell=</varname>, the
<listitem><para>Takes a boolean argument or enables the option if specified
without an argument. If enabled, the system manager (PID 1) will reboot the
machine automatically when it crashes, after a 10s delay. Otherwise, the
system will hang indefinitely. Defaults to disabled, in order to avoid a
reboot loop. If combined with <varname>systemd.crash_shell</varname>, the
system is rebooted after the shell exits.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>systemd.confirm_spawn=</varname></term>
<term><varname>systemd.confirm_spawn</varname></term>
<listitem><para>Takes a boolean argument or a path to the
virtual console where the confirmation messages should be
emitted. If <option>yes</option>, the system manager (PID 1)
asks for confirmation when spawning processes using
<option>/dev/console</option>. If a path or a console name
(such as <literal>ttyS0</literal>) is provided, the virtual
console pointed to by this path or described by the give name
will be used instead. Defaults to <option>no</option>.</para></listitem>
<listitem><para>Takes a boolean argument or a path to the virtual console
where the confirmation messages should be emitted. Can be also specified
without an argument, with the same effect as a positive boolean. If enabled,
the system manager (PID 1) asks for confirmation when spawning processes
using <option>/dev/console</option>. If a path or a console name (such as
<literal>ttyS0</literal>) is provided, the virtual console pointed to by this
path or described by the give name will be used instead. Defaults to disabled.
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>systemd.show_status=</varname></term>
<term><varname>systemd.show_status</varname></term>
<listitem><para>Takes a boolean argument or the constant <constant>auto</constant>. If <option>yes</option>,
the systemd manager (PID 1) shows terse service status updates on the console during bootup.
<constant>auto</constant> behaves like <option>false</option> until a unit fails or there is a significant
delay in boot. Defaults to <option>yes</option>, unless <option>quiet</option> is passed as kernel command
line option, in which case it defaults to <constant>auto</constant>. If specified overrides the system manager
configuration file option <option>ShowStatus=</option>, see
<citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>. However,
the process command line option <option>--show-status=</option> takes precedence over both this kernel command
line option and the configuration file option.</para></listitem>
<listitem><para>Takes a boolean argument or the constant
<constant>auto</constant>. Can be also specified without an argument, with
the same effect as a positive boolean. If enabled, the systemd manager (PID
1) shows terse service status updates on the console during bootup.
<constant>auto</constant> behaves like <option>false</option> until a unit
fails or there is a significant delay in boot. Defaults to enabled, unless
<option>quiet</option> is passed as kernel command line option, in which case
it defaults to <constant>auto</constant>. If specified overrides the system
manager configuration file option <option>ShowStatus=</option>, see
<citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
However, the process command line option <option>--show-status=</option>
takes precedence over both this kernel command line option and the
configuration file option.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>systemd.log_target=</varname></term>
<term><varname>systemd.log_level=</varname></term>
<term><varname>systemd.log_color=</varname></term>
<term><varname>systemd.log_location=</varname></term>
<term><varname>systemd.log_color</varname></term>
<listitem><para>Controls log output, with the same effect as
the <varname>$SYSTEMD_LOG_TARGET</varname>,
<listitem><para>Controls log output, with the same effect as the
<varname>$SYSTEMD_LOG_TARGET</varname>,
<varname>$SYSTEMD_LOG_LEVEL</varname>,
<varname>$SYSTEMD_LOG_COLOR</varname>,
<varname>$SYSTEMD_LOG_LOCATION</varname> environment variables
described above.</para></listitem>
<varname>$SYSTEMD_LOG_LOCATION</varname>,
<varname>$SYSTEMD_LOG_COLOR</varname> environment variables described above.
<varname>systemd.log_color</varname> can be specified without an argument,
with the same effect as a positive boolean.</para></listitem>
</varlistentry>
<varlistentry>
@@ -1010,6 +1017,41 @@
for every boot.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>systemd.unified_cgroup_hierarchy</varname></term>
<listitem><para>When specified without an argument or with a true argument,
enables the usage of
<ulink url="https://www.kernel.org/doc/Documentation/cgroup-v2.txt">unified cgroup hierarchy</ulink>
(a.k.a. cgroups-v2). When specified with a false argument, fall back to
hybrid or full legacy cgroup hierarchy.</para>
<para>If this option is not specified, the default behaviour is determined
during compilation (the <option>--with-default-hierarchy=</option>
option). If the kernel does not support unified cgroup hierarchy, the legacy
hierarchy will be used even if this option is specified.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>systemd.legacy_systemd_cgroup_controller</varname></term>
<listitem><para>Takes effect if the full unified cgroup hierarchy is not used
(see previous option). When specified without an argument or with a true
argument, disables the use of "hybrid" cgroup hierarchy (i.e. a cgroups-v2
tree used for systemd, and
<ulink url="https://www.kernel.org/doc/Documentation/cgroup-v1/">legacy
cgroup hierarchy</ulink>, a.k.a. cgroups-v1, for other controllers), and
forces a full "legacy" mode. When specified with a false argument, enables
the use of "hybrid" hierarchy.</para>
<para>If this option is not specified, the default behaviour is determined
during compilation (the <option>--with-default-hierarchy=</option>
option). If the kernel does not support unified cgroup hierarchy, the legacy
hierarchy will be used even if this option is specified.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>quiet</varname></term>