mirror of
https://github.com/systemd/systemd-stable.git
synced 2024-12-24 21:34:08 +03:00
e0c46a7364
After discussions with @htejun it appears it's OK now to enable memory accounting by default for all units without affecting system performance too badly. facebook has made good experiences with deploying memory accounting across their infrastructure. This hence turns MemoryAccounting= from opt-in to opt-out, similar to how TasksAccounting= is already handled. The other accounting options remain off, their performance impact is too big still.
414 lines
20 KiB
XML
414 lines
20 KiB
XML
<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
|
|
|
<!--
|
|
SPDX-License-Identifier: LGPL-2.1+
|
|
|
|
This file is part of systemd.
|
|
|
|
Copyright 2010 Lennart Poettering
|
|
|
|
systemd is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or
|
|
(at your option) any later version.
|
|
|
|
systemd is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
|
-->
|
|
|
|
<refentry id="systemd-system.conf"
|
|
xmlns:xi="http://www.w3.org/2001/XInclude">
|
|
<refentryinfo>
|
|
<title>systemd-system.conf</title>
|
|
<productname>systemd</productname>
|
|
|
|
<authorgroup>
|
|
<author>
|
|
<contrib>Developer</contrib>
|
|
<firstname>Lennart</firstname>
|
|
<surname>Poettering</surname>
|
|
<email>lennart@poettering.net</email>
|
|
</author>
|
|
</authorgroup>
|
|
</refentryinfo>
|
|
|
|
<refmeta>
|
|
<refentrytitle>systemd-system.conf</refentrytitle>
|
|
<manvolnum>5</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>systemd-system.conf</refname>
|
|
<refname>system.conf.d</refname>
|
|
<refname>systemd-user.conf</refname>
|
|
<refname>user.conf.d</refname>
|
|
<refpurpose>System and session service manager configuration files</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<para><filename>/etc/systemd/system.conf</filename>,
|
|
<filename>/etc/systemd/system.conf.d/*.conf</filename>,
|
|
<filename>/run/systemd/system.conf.d/*.conf</filename>,
|
|
<filename>/usr/lib/systemd/system.conf.d/*.conf</filename></para>
|
|
<para><filename>/etc/systemd/user.conf</filename>,
|
|
<filename>/etc/systemd/user.conf.d/*.conf</filename>,
|
|
<filename>/run/systemd/user.conf.d/*.conf</filename>,
|
|
<filename>/usr/lib/systemd/user.conf.d/*.conf</filename></para>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para>When run as a system instance, systemd interprets the
|
|
configuration file <filename>system.conf</filename> and the files
|
|
in <filename>system.conf.d</filename> directories; when run as a
|
|
user instance, systemd interprets the configuration file
|
|
<filename>user.conf</filename> and the files in
|
|
<filename>user.conf.d</filename> directories. These configuration
|
|
files contain a few settings controlling basic manager
|
|
operations.</para>
|
|
</refsect1>
|
|
|
|
<xi:include href="standard-conf.xml" xpointer="main-conf" />
|
|
|
|
<refsect1>
|
|
<title>Options</title>
|
|
|
|
<para>All options are configured in the
|
|
<literal>[Manager]</literal> section:</para>
|
|
|
|
<variablelist class='systemd-directives'>
|
|
|
|
<varlistentry>
|
|
<term><varname>LogLevel=</varname></term>
|
|
<term><varname>LogTarget=</varname></term>
|
|
<term><varname>LogColor=</varname></term>
|
|
<term><varname>LogLocation=</varname></term>
|
|
<term><varname>DumpCore=yes</varname></term>
|
|
<term><varname>CrashChangeVT=no</varname></term>
|
|
<term><varname>CrashShell=no</varname></term>
|
|
<term><varname>CrashReboot=no</varname></term>
|
|
<term><varname>ShowStatus=yes</varname></term>
|
|
<term><varname>DefaultStandardOutput=journal</varname></term>
|
|
<term><varname>DefaultStandardError=inherit</varname></term>
|
|
|
|
<listitem><para>Configures various parameters of basic manager operation. These options may be overridden by
|
|
the respective process and kernel command line arguments. See
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry> for
|
|
details.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>CtrlAltDelBurstAction=</varname></term>
|
|
|
|
<listitem><para>Defines what action will be performed
|
|
if user presses Ctrl-Alt-Delete more than 7 times in 2s.
|
|
Can be set to <literal>reboot-force</literal>, <literal>poweroff-force</literal>,
|
|
<literal>reboot-immediate</literal>, <literal>poweroff-immediate</literal>
|
|
or disabled with <literal>none</literal>. Defaults to
|
|
<literal>reboot-force</literal>.
|
|
</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>CPUAffinity=</varname></term>
|
|
|
|
<listitem><para>Configures the initial CPU affinity for the
|
|
init process. Takes a list of CPU indices or ranges separated
|
|
by either whitespace or commas. CPU ranges are specified by
|
|
the lower and upper CPU indices separated by a
|
|
dash.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>JoinControllers=cpu,cpuacct net_cls,netprio</varname></term>
|
|
|
|
<listitem><para>Configures controllers that shall be mounted
|
|
in a single hierarchy. By default, systemd will mount all
|
|
controllers which are enabled in the kernel in individual
|
|
hierarchies, with the exception of those listed in this
|
|
setting. Takes a space-separated list of comma-separated
|
|
controller names, in order to allow multiple joined
|
|
hierarchies. Defaults to 'cpu,cpuacct'. Pass an empty string
|
|
to ensure that systemd mounts all controllers in separate
|
|
hierarchies.</para>
|
|
|
|
<para>Note that this option is only applied once, at very
|
|
early boot. If you use an initial RAM disk (initrd) that uses
|
|
systemd, it might hence be necessary to rebuild the initrd if
|
|
this option is changed, and make sure the new configuration
|
|
file is included in it. Otherwise, the initrd might mount the
|
|
controller hierarchies in a different configuration than
|
|
intended, and the main system cannot remount them
|
|
anymore.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>RuntimeWatchdogSec=</varname></term>
|
|
<term><varname>ShutdownWatchdogSec=</varname></term>
|
|
|
|
<listitem><para>Configure the hardware watchdog at runtime and
|
|
at reboot. Takes a timeout value in seconds (or in other time
|
|
units if suffixed with <literal>ms</literal>,
|
|
<literal>min</literal>, <literal>h</literal>,
|
|
<literal>d</literal>, <literal>w</literal>). If
|
|
<varname>RuntimeWatchdogSec=</varname> is set to a non-zero
|
|
value, the watchdog hardware
|
|
(<filename>/dev/watchdog</filename> or the path specified with
|
|
<varname>WatchdogDevice=</varname> or the kernel option
|
|
<varname>systemd.watchdog-device=</varname>) will be programmed
|
|
to automatically reboot the system if it is not contacted within
|
|
the specified timeout interval. The system manager will ensure
|
|
to contact it at least once in half the specified timeout
|
|
interval. This feature requires a hardware watchdog device to
|
|
be present, as it is commonly the case in embedded and server
|
|
systems. Not all hardware watchdogs allow configuration of the
|
|
reboot timeout, in which case the closest available timeout is
|
|
picked. <varname>ShutdownWatchdogSec=</varname> may be used to
|
|
configure the hardware watchdog when the system is asked to
|
|
reboot. It works as a safety net to ensure that the reboot
|
|
takes place even if a clean reboot attempt times out. By
|
|
default <varname>RuntimeWatchdogSec=</varname> defaults to 0
|
|
(off), and <varname>ShutdownWatchdogSec=</varname> to 10min.
|
|
These settings have no effect if a hardware watchdog is not
|
|
available.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>WatchdogDevice=</varname></term>
|
|
|
|
<listitem><para>Configure the hardware watchdog device that the
|
|
runtime and shutdown watchdog timers will open and use. Defaults
|
|
to <filename>/dev/watchdog</filename>. This setting has no
|
|
effect if a hardware watchdog is not available.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>CapabilityBoundingSet=</varname></term>
|
|
|
|
<listitem><para>Controls which capabilities to include in the
|
|
capability bounding set for PID 1 and its children. See
|
|
<citerefentry project='man-pages'><refentrytitle>capabilities</refentrytitle><manvolnum>7</manvolnum></citerefentry>
|
|
for details. Takes a whitespace-separated list of capability
|
|
names as read by
|
|
<citerefentry project='mankier'><refentrytitle>cap_from_name</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
|
|
Capabilities listed will be included in the bounding set, all
|
|
others are removed. If the list of capabilities is prefixed
|
|
with ~, all but the listed capabilities will be included, the
|
|
effect of the assignment inverted. Note that this option also
|
|
affects the respective capabilities in the effective,
|
|
permitted and inheritable capability sets. The capability
|
|
bounding set may also be individually configured for units
|
|
using the <varname>CapabilityBoundingSet=</varname> directive
|
|
for units, but note that capabilities dropped for PID 1 cannot
|
|
be regained in individual units, they are lost for
|
|
good.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>SystemCallArchitectures=</varname></term>
|
|
|
|
<listitem><para>Takes a space-separated list of architecture
|
|
identifiers. Selects from which architectures system calls may
|
|
be invoked on this system. This may be used as an effective
|
|
way to disable invocation of non-native binaries system-wide,
|
|
for example to prohibit execution of 32-bit x86 binaries on
|
|
64-bit x86-64 systems. This option operates system-wide, and
|
|
acts similar to the
|
|
<varname>SystemCallArchitectures=</varname> setting of unit
|
|
files, see
|
|
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for details. This setting defaults to the empty list, in which
|
|
case no filtering of system calls based on architecture is
|
|
applied. Known architecture identifiers are
|
|
<literal>x86</literal>, <literal>x86-64</literal>,
|
|
<literal>x32</literal>, <literal>arm</literal> and the special
|
|
identifier <literal>native</literal>. The latter implicitly
|
|
maps to the native architecture of the system (or more
|
|
specifically, the architecture the system manager was compiled
|
|
for). Set this setting to <literal>native</literal> to
|
|
prohibit execution of any non-native binaries. When a binary
|
|
executes a system call of an architecture that is not listed
|
|
in this setting, it will be immediately terminated with the
|
|
SIGSYS signal.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>TimerSlackNSec=</varname></term>
|
|
|
|
<listitem><para>Sets the timer slack in nanoseconds for PID 1,
|
|
which is inherited by all executed processes, unless
|
|
overridden individually, for example with the
|
|
<varname>TimerSlackNSec=</varname> setting in service units
|
|
(for details see
|
|
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>).
|
|
The timer slack controls the accuracy of wake-ups triggered by
|
|
system timers. See
|
|
<citerefentry><refentrytitle>prctl</refentrytitle><manvolnum>2</manvolnum></citerefentry>
|
|
for more information. Note that in contrast to most other time
|
|
span definitions this parameter takes an integer value in
|
|
nano-seconds if no unit is specified. The usual time units are
|
|
understood too.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>DefaultTimerAccuracySec=</varname></term>
|
|
|
|
<listitem><para>Sets the default accuracy of timer units. This
|
|
controls the global default for the
|
|
<varname>AccuracySec=</varname> setting of timer units, see
|
|
<citerefentry><refentrytitle>systemd.timer</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for details. <varname>AccuracySec=</varname> set in individual
|
|
units override the global default for the specific unit.
|
|
Defaults to 1min. Note that the accuracy of timer units is
|
|
also affected by the configured timer slack for PID 1, see
|
|
<varname>TimerSlackNSec=</varname> above.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>DefaultTimeoutStartSec=</varname></term>
|
|
<term><varname>DefaultTimeoutStopSec=</varname></term>
|
|
<term><varname>DefaultRestartSec=</varname></term>
|
|
|
|
<listitem><para>Configures the default timeouts for starting
|
|
and stopping of units, as well as the default time to sleep
|
|
between automatic restarts of units, as configured per-unit in
|
|
<varname>TimeoutStartSec=</varname>,
|
|
<varname>TimeoutStopSec=</varname> and
|
|
<varname>RestartSec=</varname> (for services, see
|
|
<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for details on the per-unit settings). For non-service units,
|
|
<varname>DefaultTimeoutStartSec=</varname> sets the default
|
|
<varname>TimeoutSec=</varname>
|
|
value. <varname>DefaultTimeoutStartSec=</varname> and
|
|
<varname>DefaultTimeoutStopSec=</varname> default to
|
|
90s. <varname>DefaultRestartSec=</varname> defaults to
|
|
100ms.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>DefaultStartLimitIntervalSec=</varname></term>
|
|
<term><varname>DefaultStartLimitBurst=</varname></term>
|
|
|
|
<listitem><para>Configure the default unit start rate
|
|
limiting, as configured per-service by
|
|
<varname>StartLimitIntervalSec=</varname> and
|
|
<varname>StartLimitBurst=</varname>. See
|
|
<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for details on the per-service settings.
|
|
<varname>DefaultStartLimitIntervalSec=</varname> defaults to
|
|
10s. <varname>DefaultStartLimitBurst=</varname> defaults to
|
|
5.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>DefaultEnvironment=</varname></term>
|
|
|
|
<listitem><para>Sets manager environment variables passed to
|
|
all executed processes. Takes a space-separated list of
|
|
variable assignments. See
|
|
<citerefentry project='man-pages'><refentrytitle>environ</refentrytitle><manvolnum>7</manvolnum></citerefentry>
|
|
for details about environment variables.</para>
|
|
|
|
<para>Example:
|
|
|
|
<programlisting>DefaultEnvironment="VAR1=word1 word2" VAR2=word3 "VAR3=word 5 6"</programlisting>
|
|
|
|
Sets three variables
|
|
<literal>VAR1</literal>,
|
|
<literal>VAR2</literal>,
|
|
<literal>VAR3</literal>.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>DefaultCPUAccounting=</varname></term>
|
|
<term><varname>DefaultBlockIOAccounting=</varname></term>
|
|
<term><varname>DefaultMemoryAccounting=</varname></term>
|
|
<term><varname>DefaultTasksAccounting=</varname></term>
|
|
<term><varname>DefaultIPAccounting=</varname></term>
|
|
|
|
<listitem><para>Configure the default resource accounting settings, as configured per-unit by
|
|
<varname>CPUAccounting=</varname>, <varname>BlockIOAccounting=</varname>, <varname>MemoryAccounting=</varname>,
|
|
<varname>TasksAccounting=</varname> and <varname>IPAccounting=</varname>. See
|
|
<citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for details on the per-unit settings. <varname>DefaultTasksAccounting=</varname> and
|
|
<varname>DefaultMemoryAccounting=</varname> default to on, the other three settings to off.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>DefaultTasksMax=</varname></term>
|
|
|
|
<listitem><para>Configure the default value for the per-unit <varname>TasksMax=</varname> setting. See
|
|
<citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for details. This setting applies to all unit types that support resource control settings, with the exception
|
|
of slice units. Defaults to 15%, which equals 4915 with the kernel's defaults on the host, but might be smaller
|
|
in OS containers.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>DefaultLimitCPU=</varname></term>
|
|
<term><varname>DefaultLimitFSIZE=</varname></term>
|
|
<term><varname>DefaultLimitDATA=</varname></term>
|
|
<term><varname>DefaultLimitSTACK=</varname></term>
|
|
<term><varname>DefaultLimitCORE=</varname></term>
|
|
<term><varname>DefaultLimitRSS=</varname></term>
|
|
<term><varname>DefaultLimitNOFILE=</varname></term>
|
|
<term><varname>DefaultLimitAS=</varname></term>
|
|
<term><varname>DefaultLimitNPROC=</varname></term>
|
|
<term><varname>DefaultLimitMEMLOCK=</varname></term>
|
|
<term><varname>DefaultLimitLOCKS=</varname></term>
|
|
<term><varname>DefaultLimitSIGPENDING=</varname></term>
|
|
<term><varname>DefaultLimitMSGQUEUE=</varname></term>
|
|
<term><varname>DefaultLimitNICE=</varname></term>
|
|
<term><varname>DefaultLimitRTPRIO=</varname></term>
|
|
<term><varname>DefaultLimitRTTIME=</varname></term>
|
|
|
|
<listitem><para>These settings control various default
|
|
resource limits for units. See
|
|
<citerefentry><refentrytitle>setrlimit</refentrytitle><manvolnum>2</manvolnum></citerefentry>
|
|
for details. The resource limit is possible to specify in two formats,
|
|
<option>value</option> to set soft and hard limits to the same value,
|
|
or <option>soft:hard</option> to set both limits individually (e.g. DefaultLimitAS=4G:16G).
|
|
Use the string <varname>infinity</varname> to
|
|
configure no limit on a specific resource. The multiplicative
|
|
suffixes K (=1024), M (=1024*1024) and so on for G, T, P and E
|
|
may be used for resource limits measured in bytes
|
|
(e.g. DefaultLimitAS=16G). For the limits referring to time values,
|
|
the usual time units ms, s, min, h and so on may be used (see
|
|
<citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>7</manvolnum></citerefentry>
|
|
for details). Note that if no time unit is specified for
|
|
<varname>DefaultLimitCPU=</varname> the default unit of seconds is
|
|
implied, while for <varname>DefaultLimitRTTIME=</varname> the default
|
|
unit of microseconds is implied. Also, note that the effective
|
|
granularity of the limits might influence their
|
|
enforcement. For example, time limits specified for
|
|
<varname>DefaultLimitCPU=</varname> will be rounded up implicitly to
|
|
multiples of 1s. These settings may be overridden in individual units
|
|
using the corresponding LimitXXX= directives. Note that these resource
|
|
limits are only defaults for units, they are not applied to PID 1
|
|
itself.</para></listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
<citerefentry project='man-pages'><refentrytitle>environ</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
|
|
<citerefentry project='man-pages'><refentrytitle>capabilities</refentrytitle><manvolnum>7</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|