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1 | <?xml version='1.0'?> <!--*-nxml-*--> |
2 | <?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?> | |
3 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
4 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> | |
5 | ||
6 | <!-- | |
7 | This file is part of systemd. | |
8 | ||
9 | Copyright 2010 Lennart Poettering | |
10 | ||
11 | systemd is free software; you can redistribute it and/or modify it | |
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12 | under the terms of the GNU Lesser General Public License as published by |
13 | the Free Software Foundation; either version 2.1 of the License, or | |
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14 | (at your option) any later version. |
15 | ||
16 | systemd is distributed in the hope that it will be useful, but | |
17 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 19 | Lesser General Public License for more details. |
f3e219a2 | 20 | |
5430f7f2 | 21 | You should have received a copy of the GNU Lesser General Public License |
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22 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
23 | --> | |
24 | ||
5f9cfd4c | 25 | <refentry id="systemd-system.conf"> |
f3e219a2 | 26 | <refentryinfo> |
5f9cfd4c | 27 | <title>systemd-system.conf</title> |
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28 | <productname>systemd</productname> |
29 | ||
30 | <authorgroup> | |
31 | <author> | |
32 | <contrib>Developer</contrib> | |
33 | <firstname>Lennart</firstname> | |
34 | <surname>Poettering</surname> | |
35 | <email>lennart@poettering.net</email> | |
36 | </author> | |
37 | </authorgroup> | |
38 | </refentryinfo> | |
39 | ||
40 | <refmeta> | |
5f9cfd4c | 41 | <refentrytitle>systemd-system.conf</refentrytitle> |
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42 | <manvolnum>5</manvolnum> |
43 | </refmeta> | |
44 | ||
45 | <refnamediv> | |
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46 | <refname>systemd-system.conf</refname> |
47 | <refname>systemd-user.conf</refname> | |
48 | <refpurpose>System and session service manager configuration file</refpurpose> | |
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49 | </refnamediv> |
50 | ||
51 | <refsynopsisdiv> | |
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52 | <para><filename>/etc/systemd/system.conf</filename></para> |
53 | <para><filename>/etc/systemd/user.conf</filename></para> | |
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54 | </refsynopsisdiv> |
55 | ||
56 | <refsect1> | |
57 | <title>Description</title> | |
58 | ||
59 | <para>When run as system instance systemd reads the | |
60 | configuration file <filename>system.conf</filename>, | |
af2d49f7 | 61 | otherwise <filename>user.conf</filename>. These |
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62 | configuration files contain a few settings controlling |
63 | basic manager operations.</para> | |
64 | ||
65 | </refsect1> | |
66 | ||
67 | <refsect1> | |
68 | <title>Options</title> | |
69 | ||
70 | <para>All options are configured in the | |
71 | <literal>[Manager]</literal> section:</para> | |
72 | ||
ffafe91b | 73 | <variablelist class='systemd-directives'> |
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74 | |
75 | <varlistentry> | |
76 | <term><varname>LogLevel=</varname></term> | |
77 | <term><varname>LogTarget=</varname></term> | |
78 | <term><varname>LogColor=</varname></term> | |
79 | <term><varname>LogLocation=</varname></term> | |
80 | <term><varname>DumpCore=yes</varname></term> | |
81 | <term><varname>CrashShell=no</varname></term> | |
82 | <term><varname>ShowStatus=yes</varname></term> | |
83 | <term><varname>CrashChVT=1</varname></term> | |
706343f4 | 84 | <term><varname>DefaultStandardOutput=journal</varname></term> |
0a494f1f | 85 | <term><varname>DefaultStandardError=inherit</varname></term> |
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86 | |
87 | <listitem><para>Configures various | |
88 | parameters of basic manager | |
89 | operation. These options may be | |
5471472d | 90 | overridden by the respective command |
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91 | line arguments. See |
92 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
93 | for details about these command line | |
94 | arguments.</para></listitem> | |
95 | </varlistentry> | |
96 | ||
97 | <varlistentry> | |
98 | <term><varname>CPUAffinity=</varname></term> | |
99 | ||
100 | <listitem><para>Configures the initial | |
101 | CPU affinity for the init | |
96d4ce01 | 102 | process. Takes a space-separated list |
f3e219a2 | 103 | of CPU indexes.</para></listitem> |
af2d49f7 | 104 | </varlistentry> |
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105 | |
106 | <varlistentry> | |
107 | <term><varname>DefaultControllers=cpu</varname></term> | |
108 | ||
109 | <listitem><para>Configures in which | |
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110 | control group hierarchies to create |
111 | per-service cgroups automatically, in | |
112 | addition to the | |
113 | <literal>name=systemd</literal> named | |
114 | hierarchy. Defaults to | |
115 | <literal>cpu</literal>. Takes a space | |
116 | separated list of controller | |
117 | names. Pass the empty string to ensure | |
118 | that systemd does not touch any | |
119 | hierarchies but its own.</para> | |
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120 | |
121 | <para>Note that the default value of | |
122 | 'cpu' will make realtime scheduling | |
123 | unavailable to system services. See | |
124 | <ulink | |
125 | url="http://www.freedesktop.org/wiki/Software/systemd/MyServiceCantGetRealtime">My | |
126 | Service Can't Get Realtime!</ulink> | |
127 | for more | |
128 | information.</para></listitem> | |
06d4c99a | 129 | </varlistentry> |
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130 | |
131 | <varlistentry> | |
be5412d8 | 132 | <term><varname>JoinControllers=cpu,cpuacct,cpuset net_cls,netprio</varname></term> |
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133 | |
134 | <listitem><para>Configures controllers | |
135 | that shall be mounted in a single | |
136 | hierarchy. By default systemd will | |
137 | mount all controllers which are | |
138 | enabled in the kernel in individual | |
49f43d5f | 139 | hierarchies, with the exception of |
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140 | those listed in this setting. Takes a |
141 | space separated list of comma | |
142 | separated controller names, in order | |
143 | to allow multiple joined | |
144 | hierarchies. Defaults to | |
145 | 'cpu,cpuacct'. Pass an empty string to | |
146 | ensure that systemd mounts all | |
147 | controllers in separate | |
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148 | hierarchies.</para> |
149 | ||
150 | <para>Note that this option is only | |
151 | applied once, at very early boot. If | |
152 | you use an initial RAM disk (initrd) | |
153 | that uses systemd it might hence be | |
154 | necessary to rebuild the initrd if | |
155 | this option is changed, and make sure | |
156 | the new configuration file is included | |
157 | in it. Otherwise the initrd might | |
ab06eef8 | 158 | mount the controller hierarchies in a |
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159 | different configuration than intended, |
160 | and the main system cannot remount | |
161 | them anymore.</para></listitem> | |
0c85a4f3 | 162 | </varlistentry> |
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163 | |
164 | <varlistentry> | |
165 | <term><varname>RuntimeWatchdogSec=</varname></term> | |
166 | <term><varname>ShutdownWatchdogSec=</varname></term> | |
167 | ||
168 | <listitem><para>Configure the hardware | |
169 | watchdog at runtime and at | |
170 | reboot. Takes a timeout value in | |
171 | seconds (or in other time units if | |
172 | suffixed with <literal>ms</literal>, | |
173 | <literal>min</literal>, | |
174 | <literal>h</literal>, | |
175 | <literal>d</literal>, | |
176 | <literal>w</literal>). If | |
177 | <varname>RuntimeWatchdogSec=</varname> | |
178 | is set to a non-zero value the | |
179 | watchdog hardware | |
180 | (<filename>/dev/watchdog</filename>) | |
181 | will be programmed to automatically | |
182 | reboot the system if it is not | |
183 | contacted within the specified timeout | |
184 | interval. The system manager will | |
185 | ensure to contact it at least once in | |
186 | half the specified timeout | |
187 | interval. This feature requires a | |
188 | hardware watchdog device to be | |
189 | present, as it is commonly the case in | |
190 | embedded and server systems. Not all | |
191 | hardware watchdogs allow configuration | |
192 | of the reboot timeout, in which case | |
193 | the closest available timeout is | |
194 | picked. <varname>ShutdownWatchdogSec=</varname> | |
195 | may be used to configure the hardware | |
196 | watchdog when the system is asked to | |
197 | reboot. It works as a safety net to | |
198 | ensure that the reboot takes place | |
199 | even if a clean reboot attempt times | |
200 | out. By default | |
201 | <varname>RuntimeWatchdogSec=</varname> | |
202 | defaults to 0 (off), and | |
203 | <varname>ShutdownWatchdogSec=</varname> | |
204 | to 10min. These settings have no | |
205 | effect if a hardware watchdog is not | |
206 | available.</para></listitem> | |
207 | </varlistentry> | |
c93ff2e9 | 208 | |
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209 | <varlistentry> |
210 | <term><varname>CapabilityBoundingSet=</varname></term> | |
211 | ||
212 | <listitem><para>Controls which | |
213 | capabilities to include in the | |
214 | capability bounding set for PID 1 and | |
215 | its children. See | |
216 | <citerefentry><refentrytitle>capabilities</refentrytitle><manvolnum>7</manvolnum></citerefentry> | |
217 | for details. Takes a whitespace | |
218 | separated list of capability names as | |
219 | read by | |
220 | <citerefentry><refentrytitle>cap_from_name</refentrytitle><manvolnum>3</manvolnum></citerefentry>. | |
221 | Capabilities listed will be included | |
222 | in the bounding set, all others are | |
223 | removed. If the list of capabilities | |
224 | is prefixed with ~ all but the listed | |
225 | capabilities will be included, the | |
226 | effect of the assignment | |
227 | inverted. Note that this option also | |
bb31a4ac | 228 | affects the respective capabilities in |
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229 | the effective, permitted and |
230 | inheritable capability sets. The | |
231 | capability bounding set may also be | |
232 | individually configured for units | |
233 | using the | |
234 | <varname>CapabilityBoundingSet=</varname> | |
235 | directive for units, but note that | |
236 | capabilities dropped for PID 1 cannot | |
237 | be regained in individual units, they | |
238 | are lost for good.</para></listitem> | |
239 | </varlistentry> | |
240 | ||
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241 | <varlistentry> |
242 | <term><varname>TimerSlackNSec=</varname></term> | |
243 | ||
244 | <listitem><para>Sets the timer slack | |
245 | in nanoseconds for PID 1 which is then | |
246 | inherited to all executed processes, | |
bb31a4ac | 247 | unless overridden individually, for |
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248 | example with the |
249 | <varname>TimerSlackNSec=</varname> | |
250 | setting in service units (for details | |
251 | see | |
252 | <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>). The | |
253 | timer slack controls the accuracy of | |
254 | wake-ups triggered by timers. See | |
255 | <citerefentry><refentrytitle>prctl</refentrytitle><manvolnum>2</manvolnum></citerefentry> | |
256 | for more information. Note that in | |
257 | contrast to most other time span | |
258 | definitions this parameter takes an | |
259 | integer value in nano-seconds if no | |
260 | unit is specified. The usual time | |
261 | units are understood | |
262 | too.</para></listitem> | |
263 | </varlistentry> | |
264 | ||
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265 | <varlistentry> |
266 | <term><varname>DefaultEnvironment=</varname></term> | |
267 | ||
268 | <listitem><para>Sets systemd manager | |
269 | environment variables for executed | |
270 | processes. Takes a space-separated | |
271 | list of variable assignments. | |
272 | </para> | |
273 | ||
274 | <para>Example: | |
275 | <programlisting>Environment="VAR1=word1 word2" VAR2=word3 "VAR3=word 5 6"</programlisting> | |
276 | gives three variables <literal>VAR1</literal>, | |
277 | <literal>VAR2</literal>, <literal>VAR3</literal>. | |
278 | </para> | |
279 | ||
280 | <para> | |
281 | See | |
282 | <citerefentry><refentrytitle>environ</refentrytitle><manvolnum>7</manvolnum></citerefentry> | |
283 | for details about environment variables.</para></listitem> | |
284 | </varlistentry> | |
285 | ||
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286 | <varlistentry> |
287 | <term><varname>DefaultLimitCPU=</varname></term> | |
288 | <term><varname>DefaultLimitFSIZE=</varname></term> | |
289 | <term><varname>DefaultLimitDATA=</varname></term> | |
290 | <term><varname>DefaultLimitSTACK=</varname></term> | |
291 | <term><varname>DefaultLimitCORE=</varname></term> | |
292 | <term><varname>DefaultLimitRSS=</varname></term> | |
293 | <term><varname>DefaultLimitNOFILE=</varname></term> | |
294 | <term><varname>DefaultLimitAS=</varname></term> | |
295 | <term><varname>DefaultLimitNPROC=</varname></term> | |
296 | <term><varname>DefaultLimitMEMLOCK=</varname></term> | |
297 | <term><varname>DefaultLimitLOCKS=</varname></term> | |
298 | <term><varname>DefaultLimitSIGPENDING=</varname></term> | |
299 | <term><varname>DefaultLimitMSGQUEUE=</varname></term> | |
300 | <term><varname>DefaultLimitNICE=</varname></term> | |
301 | <term><varname>DefaultLimitRTPRIO=</varname></term> | |
302 | <term><varname>DefaultLimitRTTIME=</varname></term> | |
ec8927ca | 303 | |
c93ff2e9 | 304 | <listitem><para>These settings control |
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305 | various default resource limits for |
306 | units. See | |
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307 | <citerefentry><refentrytitle>setrlimit</refentrytitle><manvolnum>2</manvolnum></citerefentry> |
308 | for details. Use the string | |
309 | <varname>infinity</varname> to | |
310 | configure no limit on a specific | |
ec8927ca | 311 | resource. These settings may be |
bb31a4ac | 312 | overridden in individual units |
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313 | using the corresponding LimitXXX= |
314 | directives. Note that these resource | |
315 | limits are only defaults for units, | |
316 | they are not applied to PID 1 | |
317 | itself.</para></listitem> | |
c93ff2e9 | 318 | </varlistentry> |
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319 | </variablelist> |
320 | </refsect1> | |
321 | ||
322 | <refsect1> | |
323 | <title>See Also</title> | |
324 | <para> | |
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325 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, |
326 | <citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry> | |
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327 | </para> |
328 | </refsect1> | |
329 | ||
330 | </refentry> |