]>
Commit | Line | Data |
---|---|---|
f757855e LP |
1 | <?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*--> |
2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [ | |
4 | <!ENTITY % entities SYSTEM "custom-entities.ent" > | |
5 | %entities; | |
6 | ]> | |
7 | ||
8 | <!-- | |
572eb058 ZJS |
9 | SPDX-License-Identifier: LGPL-2.1+ |
10 | ||
f757855e LP |
11 | This file is part of systemd. |
12 | ||
13 | Copyright 2015 Lennart Poettering | |
14 | ||
15 | systemd is free software; you can redistribute it and/or modify it | |
16 | under the terms of the GNU Lesser General Public License as published by | |
17 | the Free Software Foundation; either version 2.1 of the License, or | |
18 | (at your option) any later version. | |
19 | ||
20 | systemd is distributed in the hope that it will be useful, but | |
21 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
23 | Lesser General Public License for more details. | |
24 | ||
25 | You should have received a copy of the GNU Lesser General Public License | |
26 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
27 | --> | |
28 | ||
29 | <refentry id="systemd.nspawn"> | |
30 | ||
31 | <refentryinfo> | |
32 | <title>systemd.nspawn</title> | |
33 | <productname>systemd</productname> | |
34 | ||
35 | <authorgroup> | |
36 | <author> | |
37 | <contrib>Developer</contrib> | |
38 | <firstname>Lennart</firstname> | |
39 | <surname>Poettering</surname> | |
40 | <email>lennart@poettering.net</email> | |
41 | </author> | |
42 | </authorgroup> | |
43 | </refentryinfo> | |
44 | ||
45 | <refmeta> | |
46 | <refentrytitle>systemd.nspawn</refentrytitle> | |
47 | <manvolnum>5</manvolnum> | |
48 | </refmeta> | |
49 | ||
50 | <refnamediv> | |
51 | <refname>systemd.nspawn</refname> | |
52 | <refpurpose>Container settings</refpurpose> | |
53 | </refnamediv> | |
54 | ||
55 | <refsynopsisdiv> | |
56 | <para><filename>/etc/systemd/nspawn/<replaceable>machine</replaceable>.nspawn</filename></para> | |
57 | <para><filename>/run/systemd/nspawn/<replaceable>machine</replaceable>.nspawn</filename></para> | |
58 | <para><filename>/var/lib/machines/<replaceable>machine</replaceable>.nspawn</filename></para> | |
59 | </refsynopsisdiv> | |
60 | ||
61 | <refsect1> | |
62 | <title>Description</title> | |
63 | ||
64 | <para>An nspawn container settings file (suffix | |
65 | <filename>.nspawn</filename>) encodes additional runtime | |
66 | information about a local container, and is searched, read and | |
67 | used by | |
68 | <citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
69 | when starting a container. Files of this type are named after the | |
70 | containers they define settings for. They are optional, and only | |
71 | required for containers whose execution environment shall differ | |
72 | from the defaults. Files of this type mostly contain settings that | |
73 | may also be set on the <command>systemd-nspawn</command> command | |
74 | line, and make it easier to persistently attach specific settings | |
75 | to specific containers. The syntax of these files is inspired by | |
76 | <filename>.desktop</filename> files following the <ulink | |
77 | url="http://standards.freedesktop.org/desktop-entry-spec/latest/">XDG | |
a8eaaee7 | 78 | Desktop Entry Specification</ulink>, which in turn are inspired by |
f757855e LP |
79 | Microsoft Windows <filename>.ini</filename> files.</para> |
80 | ||
81 | <para>Boolean arguments used in these settings files can be | |
b938cb90 | 82 | written in various formats. For positive settings, the strings |
f757855e LP |
83 | <option>1</option>, <option>yes</option>, <option>true</option> |
84 | and <option>on</option> are equivalent. For negative settings, the | |
85 | strings <option>0</option>, <option>no</option>, | |
86 | <option>false</option> and <option>off</option> are | |
87 | equivalent.</para> | |
88 | ||
89 | <para>Empty lines and lines starting with # or ; are | |
90 | ignored. This may be used for commenting. Lines ending | |
91 | in a backslash are concatenated with the following | |
92 | line while reading and the backslash is replaced by a | |
93 | space character. This may be used to wrap long lines.</para> | |
94 | ||
95 | </refsect1> | |
96 | ||
97 | <refsect1> | |
98 | <title><filename>.nspawn</filename> File Discovery</title> | |
99 | ||
100 | <para>Files are searched by appending the | |
101 | <filename>.nspawn</filename> suffix to the machine name of the | |
102 | container, as specified with the <option>--machine=</option> | |
103 | switch of <command>systemd-nspawn</command>, or derived from the | |
104 | directory or image file name. This file is first searched in | |
105 | <filename>/etc/systemd/nspawn/</filename> and | |
106 | <filename>/run/systemd/nspawn/</filename>. If found in these | |
b938cb90 | 107 | directories, its settings are read and all of them take full effect |
4f76ef04 | 108 | (but are possibly overridden by corresponding command line |
b938cb90 | 109 | arguments). If not found, the file will then be searched next to |
f757855e | 110 | the image file or in the immediate parent of the root directory of |
b938cb90 | 111 | the container. If the file is found there, only a subset of the |
f757855e LP |
112 | settings will take effect however. All settings that possibly |
113 | elevate privileges or grant additional access to resources of the | |
114 | host (such as files or directories) are ignored. To which options | |
115 | this applies is documented below.</para> | |
116 | ||
a8eaaee7 | 117 | <para>Persistent settings files created and maintained by the |
f757855e LP |
118 | administrator (and thus trusted) should be placed in |
119 | <filename>/etc/systemd/nspawn/</filename>, while automatically | |
120 | downloaded (and thus potentially untrusted) settings files are | |
121 | placed in <filename>/var/lib/machines/</filename> instead (next to | |
122 | the container images), where their security impact is limited. In | |
123 | order to add privileged settings to <filename>.nspawn</filename> | |
b938cb90 | 124 | files acquired from the image vendor, it is recommended to copy the |
f757855e LP |
125 | settings files into <filename>/etc/systemd/nspawn/</filename> and |
126 | edit them there, so that the privileged options become | |
a8eaaee7 | 127 | available. The precise algorithm for how the files are searched and |
f757855e LP |
128 | interpreted may be configured with |
129 | <command>systemd-nspawn</command>'s <option>--settings=</option> | |
130 | switch, see | |
131 | <citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
132 | for details.</para> | |
133 | </refsect1> | |
134 | ||
135 | <refsect1> | |
136 | <title>[Exec] Section Options</title> | |
137 | ||
138 | <para>Settings files may include an <literal>[Exec]</literal> | |
139 | section, which carries various execution parameters:</para> | |
140 | ||
141 | <variablelist> | |
142 | ||
143 | <varlistentry> | |
144 | <term><varname>Boot=</varname></term> | |
145 | ||
7732f92b LP |
146 | <listitem><para>Takes a boolean argument, which defaults to off. If enabled, <command>systemd-nspawn</command> |
147 | will automatically search for an <filename>init</filename> executable and invoke it. In this case, the | |
148 | specified parameters using <varname>Parameters=</varname> are passed as additional arguments to the | |
149 | <filename>init</filename> process. This setting corresponds to the <option>--boot</option> switch on the | |
150 | <command>systemd-nspawn</command> command line. This option may not be combined with | |
b09c0bba LP |
151 | <varname>ProcessTwo=yes</varname>. This option is the default if the |
152 | <filename>systemd-nspawn@.service</filename> template unit file is used.</para></listitem> | |
7732f92b LP |
153 | </varlistentry> |
154 | ||
155 | <varlistentry> | |
156 | <term><varname>ProcessTwo=</varname></term> | |
157 | ||
158 | <listitem><para>Takes a boolean argument, which defaults to off. If enabled, the specified program is run as | |
159 | PID 2. A stub init process is run as PID 1. This setting corresponds to the <option>--as-pid2</option> switch | |
160 | on the <command>systemd-nspawn</command> command line. This option may not be combined with | |
161 | <varname>Boot=yes</varname>.</para></listitem> | |
f757855e LP |
162 | </varlistentry> |
163 | ||
164 | <varlistentry> | |
165 | <term><varname>Parameters=</varname></term> | |
166 | ||
b938cb90 | 167 | <listitem><para>Takes a space-separated list of |
f757855e LP |
168 | arguments. This is either a command line, beginning with the |
169 | binary name to execute, or – if <varname>Boot=</varname> is | |
170 | enabled – the list of arguments to pass to the init | |
171 | process. This setting corresponds to the command line | |
172 | parameters passed on the <command>systemd-nspawn</command> | |
173 | command line.</para></listitem> | |
174 | </varlistentry> | |
175 | ||
176 | <varlistentry> | |
177 | <term><varname>Environment=</varname></term> | |
178 | ||
179 | <listitem><para>Takes an environment variable assignment | |
180 | consisting of key and value, separated by | |
181 | <literal>=</literal>. Sets an environment variable for the | |
182 | main process invoked in the container. This setting may be | |
183 | used multiple times to set multiple environment variables. It | |
184 | corresponds to the <option>--setenv=</option> command line | |
185 | switch.</para></listitem> | |
186 | </varlistentry> | |
187 | ||
188 | <varlistentry> | |
189 | <term><varname>User=</varname></term> | |
190 | ||
191 | <listitem><para>Takes a UNIX user name. Specifies the user | |
192 | name to invoke the main process of the container as. This user | |
193 | must be known in the container's user database. This | |
194 | corresponds to the <option>--user=</option> command line | |
5f932eb9 LP |
195 | switch.</para></listitem> |
196 | </varlistentry> | |
197 | ||
198 | <varlistentry> | |
199 | <term><varname>WorkingDirectory=</varname></term> | |
200 | ||
201 | <listitem><para>Selects the working directory for the process invoked in the container. Expects an absolute | |
202 | path in the container's file system namespace. This corresponds to the <option>--chdir=</option> command line | |
f757855e LP |
203 | switch.</para></listitem> |
204 | </varlistentry> | |
205 | ||
b53ede69 PW |
206 | <varlistentry> |
207 | <term><varname>PivotRoot=</varname></term> | |
208 | ||
209 | <listitem><para>Selects a directory to pivot to <filename>/</filename> inside the container when starting up. | |
210 | Takes a single path, or a pair of two paths separated by a colon. Both paths must be absolute, and are resolved | |
211 | in the container's file system namespace. This corresponds to the <option>--pivot-root=</option> command line | |
212 | switch.</para></listitem> | |
213 | </varlistentry> | |
214 | ||
f757855e LP |
215 | <varlistentry> |
216 | <term><varname>Capability=</varname></term> | |
217 | <term><varname>DropCapability=</varname></term> | |
218 | ||
b938cb90 | 219 | <listitem><para>Takes a space-separated list of Linux process |
f757855e | 220 | capabilities (see |
524f3e5c | 221 | <citerefentry project='man-pages'><refentrytitle>capabilities</refentrytitle><manvolnum>7</manvolnum></citerefentry> |
f757855e LP |
222 | for details). The <varname>Capability=</varname> setting |
223 | specifies additional capabilities to pass on top of the | |
4f76ef04 | 224 | default set of capabilities. The |
f757855e LP |
225 | <varname>DropCapability=</varname> setting specifies |
226 | capabilities to drop from the default set. These settings | |
227 | correspond to the <option>--capability=</option> and | |
228 | <option>--drop-capability=</option> command line | |
229 | switches. Note that <varname>Capability=</varname> is a | |
230 | privileged setting, and only takes effect in | |
231 | <filename>.nspawn</filename> files in | |
232 | <filename>/etc/systemd/nspawn/</filename> and | |
233 | <filename>/run/system/nspawn/</filename> (see above). On the | |
b938cb90 | 234 | other hand, <varname>DropCapability=</varname> takes effect in |
f757855e LP |
235 | all cases.</para></listitem> |
236 | </varlistentry> | |
237 | ||
b3969f73 | 238 | <varlistentry> |
c9648aa6 | 239 | <term><varname>KillSignal=</varname></term> |
b3969f73 PA |
240 | |
241 | <listitem><para>Specify the process signal to send to the | |
242 | container's PID 1 when nspawn itself receives SIGTERM, in | |
243 | order to trigger an orderly shutdown of the container. | |
244 | Defaults to SIGRTMIN+3 if <option>Boot=</option> is used | |
245 | (on systemd-compatible init systems SIGRTMIN+3 triggers an | |
246 | orderly shutdown). For a list of valid signals, see | |
247 | <citerefentry project='man-pages'><refentrytitle>signal</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para></listitem> | |
248 | </varlistentry> | |
249 | ||
f757855e LP |
250 | <varlistentry> |
251 | <term><varname>Personality=</varname></term> | |
252 | ||
253 | <listitem><para>Configures the kernel personality for the | |
254 | container. This is equivalent to the | |
255 | <option>--personality=</option> switch.</para></listitem> | |
256 | </varlistentry> | |
257 | ||
258 | <varlistentry> | |
259 | <term><varname>MachineID=</varname></term> | |
260 | ||
b938cb90 | 261 | <listitem><para>Configures the 128-bit machine ID (UUID) to pass to |
f757855e LP |
262 | the container. This is equivalent to the |
263 | <option>--uuid=</option> command line switch. This option is | |
264 | privileged (see above). </para></listitem> | |
265 | </varlistentry> | |
d2e5535f LP |
266 | |
267 | <varlistentry> | |
268 | <term><varname>PrivateUsers=</varname></term> | |
269 | ||
270 | <listitem><para>Configures support for usernamespacing. This is equivalent to the | |
271 | <option>--private-users=</option> command line switch, and takes the same options. This option is privileged | |
b09c0bba LP |
272 | (see above). This option is the default if the <filename>systemd-nspawn@.service</filename> template unit file |
273 | is used.</para></listitem> | |
d2e5535f | 274 | </varlistentry> |
9c1e04d0 AP |
275 | |
276 | <varlistentry> | |
277 | <term><varname>NotifyReady=</varname></term> | |
278 | ||
960e4569 | 279 | <listitem><para>Configures support for notifications from the container's init process. This is equivalent to |
dcfaecc7 | 280 | the <option>--notify-ready=</option> command line switch, and takes the same parameters. See |
960e4569 LP |
281 | <citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry> for details |
282 | about the specific options supported.</para></listitem> | |
9c1e04d0 | 283 | </varlistentry> |
960e4569 LP |
284 | |
285 | <varlistentry> | |
286 | <term><varname>SystemCallFilter=</varname></term> | |
287 | ||
288 | <listitem><para>Configures the system call filter applied to containers. This is equivalent to the | |
289 | <option>--system-call-filter=</option> command line switch, and takes the same list parameter. See | |
290 | <citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry> for | |
291 | details.</para></listitem> | |
292 | </varlistentry> | |
293 | ||
f757855e LP |
294 | </variablelist> |
295 | </refsect1> | |
296 | ||
297 | <refsect1> | |
298 | <title>[Files] Section Options</title> | |
299 | ||
300 | <para>Settings files may include a <literal>[Files]</literal> | |
301 | section, which carries various parameters configuring the file | |
302 | system of the container:</para> | |
303 | ||
304 | <variablelist> | |
305 | ||
306 | <varlistentry> | |
307 | <term><varname>ReadOnly=</varname></term> | |
308 | ||
a8eaaee7 | 309 | <listitem><para>Takes a boolean argument, which defaults to off. If |
b938cb90 | 310 | specified, the container will be run with a read-only file |
f757855e LP |
311 | system. This setting corresponds to the |
312 | <option>--read-only</option> command line | |
313 | switch.</para></listitem> | |
314 | </varlistentry> | |
315 | ||
316 | <varlistentry> | |
317 | <term><varname>Volatile=</varname></term> | |
318 | ||
319 | <listitem><para>Takes a boolean argument, or the special value | |
320 | <literal>state</literal>. This configures whether to run the | |
321 | container with volatile state and/or configuration. This | |
322 | option is equivalent to <option>--volatile=</option>, see | |
323 | <citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
324 | for details about the specific options | |
325 | supported.</para></listitem> | |
326 | </varlistentry> | |
327 | ||
328 | <varlistentry> | |
329 | <term><varname>Bind=</varname></term> | |
330 | <term><varname>BindReadOnly=</varname></term> | |
331 | ||
332 | <listitem><para>Adds a bind mount from the host into the | |
333 | container. Takes a single path, a pair of two paths separated | |
334 | by a colon, or a triplet of two paths plus an option string | |
335 | separated by colons. This option may be used multiple times to | |
336 | configure multiple bind mounts. This option is equivalent to | |
337 | the command line switches <option>--bind=</option> and | |
338 | <option>--bind-ro=</option>, see | |
339 | <citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
340 | for details about the specific options supported. This setting | |
341 | is privileged (see above).</para></listitem> | |
342 | </varlistentry> | |
343 | ||
344 | <varlistentry> | |
345 | <term><varname>TemporaryFileSystem=</varname></term> | |
346 | ||
347 | <listitem><para>Adds a <literal>tmpfs</literal> mount to the | |
348 | container. Takes a path or a pair of path and option string, | |
4f76ef04 | 349 | separated by a colon. This option may be used multiple times to |
f757855e LP |
350 | configure multiple <literal>tmpfs</literal> mounts. This |
351 | option is equivalent to the command line switch | |
352 | <option>--tmpfs=</option>, see | |
353 | <citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
354 | for details about the specific options supported. This setting | |
355 | is privileged (see above).</para></listitem> | |
356 | </varlistentry> | |
d2e5535f | 357 | |
7b4318b6 LP |
358 | <varlistentry> |
359 | <term><varname>Overlay=</varname></term> | |
360 | <term><varname>OverlayReadOnly=</varname></term> | |
361 | ||
362 | <listitem><para>Adds an overlay mount point. Takes a colon-separated list of paths. This option may be used | |
363 | multiple times to configure multiple overlay mounts. This option is equivalent to the command line switches | |
364 | <option>--overlay=</option> and <option>--overlay-ro=</option>, see | |
365 | <citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry> for details | |
366 | about the specific options supported. This setting is privileged (see above).</para></listitem> | |
367 | </varlistentry> | |
368 | ||
d2e5535f LP |
369 | <varlistentry> |
370 | <term><varname>PrivateUsersChown=</varname></term> | |
371 | ||
372 | <listitem><para>Configures whether the ownership of the files and directories in the container tree shall be | |
373 | adjusted to the UID/GID range used, if necessary and user namespacing is enabled. This is equivalent to the | |
374 | <option>--private-users-chown</option> command line switch. This option is privileged (see | |
375 | above). </para></listitem> | |
376 | </varlistentry> | |
377 | ||
f757855e LP |
378 | </variablelist> |
379 | </refsect1> | |
380 | ||
381 | <refsect1> | |
382 | <title>[Network] Section Options</title> | |
383 | ||
384 | <para>Settings files may include a <literal>[Network]</literal> | |
385 | section, which carries various parameters configuring the network | |
386 | connectivity of the container:</para> | |
387 | ||
388 | <variablelist> | |
389 | ||
390 | <varlistentry> | |
391 | <term><varname>Private=</varname></term> | |
392 | ||
a8eaaee7 | 393 | <listitem><para>Takes a boolean argument, which defaults to off. If |
b938cb90 | 394 | enabled, the container will run in its own network namespace |
f757855e LP |
395 | and not share network interfaces and configuration with the |
396 | host. This setting corresponds to the | |
397 | <option>--private-network</option> command line | |
398 | switch.</para></listitem> | |
399 | </varlistentry> | |
400 | ||
401 | <varlistentry> | |
402 | <term><varname>VirtualEthernet=</varname></term> | |
403 | ||
b09c0bba LP |
404 | <listitem><para>Takes a boolean argument. Configures whether to create a virtual Ethernet connection |
405 | (<literal>veth</literal>) between host and the container. This setting implies | |
406 | <varname>Private=yes</varname>. This setting corresponds to the <option>--network-veth</option> command line | |
407 | switch. This option is privileged (see above). This option is the default if the | |
408 | <filename>systemd-nspawn@.service</filename> template unit file is used.</para></listitem> | |
f757855e LP |
409 | </varlistentry> |
410 | ||
f6d6bad1 LP |
411 | <varlistentry> |
412 | <term><varname>VirtualEthernetExtra=</varname></term> | |
413 | ||
414 | <listitem><para>Takes a colon-separated pair of interface | |
415 | names. Configures an additional virtual Ethernet connection | |
416 | (<literal>veth</literal>) between host and the container. The | |
417 | first specified name is the interface name on the host, the | |
418 | second the interface name in the container. The latter may be | |
419 | omitted in which case it is set to the same name as the host | |
420 | side interface. This setting implies | |
421 | <varname>Private=yes</varname>. This setting corresponds to | |
422 | the <option>--network-veth-extra=</option> command line | |
423 | switch, and maybe be used multiple times. It is independent of | |
424 | <varname>VirtualEthernet=</varname>. This option is privileged | |
425 | (see above).</para></listitem> | |
426 | </varlistentry> | |
427 | ||
f757855e LP |
428 | <varlistentry> |
429 | <term><varname>Interface=</varname></term> | |
430 | ||
b938cb90 | 431 | <listitem><para>Takes a space-separated list of interfaces to |
f757855e LP |
432 | add to the container. This option corresponds to the |
433 | <option>--network-interface=</option> command line switch and | |
434 | implies <varname>Private=yes</varname>. This option is | |
435 | privileged (see above).</para></listitem> | |
436 | </varlistentry> | |
437 | ||
438 | <varlistentry> | |
439 | <term><varname>MACVLAN=</varname></term> | |
440 | <term><varname>IPVLAN=</varname></term> | |
441 | ||
b938cb90 | 442 | <listitem><para>Takes a space-separated list of interfaces to |
f757855e LP |
443 | add MACLVAN or IPVLAN interfaces to, which are then added to |
444 | the container. These options correspond to the | |
445 | <option>--network-macvlan=</option> and | |
446 | <option>--network-ipvlan=</option> command line switches and | |
447 | imply <varname>Private=yes</varname>. These options are | |
448 | privileged (see above).</para></listitem> | |
449 | </varlistentry> | |
450 | ||
451 | <varlistentry> | |
452 | <term><varname>Bridge=</varname></term> | |
453 | ||
454 | <listitem><para>Takes an interface name. This setting implies | |
455 | <varname>VirtualEthernet=yes</varname> and | |
456 | <varname>Private=yes</varname> and has the effect that the | |
457 | host side of the created virtual Ethernet link is connected to | |
458 | the specified bridge interface. This option corresponds to the | |
459 | <option>--network-bridge=</option> command line switch. This | |
460 | option is privileged (see above).</para></listitem> | |
461 | </varlistentry> | |
462 | ||
938d2579 LP |
463 | <varlistentry> |
464 | <term><varname>Zone=</varname></term> | |
465 | ||
466 | <listitem><para>Takes a network zone name. This setting implies <varname>VirtualEthernet=yes</varname> and | |
467 | <varname>Private=yes</varname> and has the effect that the host side of the created virtual Ethernet link is | |
468 | connected to an automatically managed bridge interface named after the passed argument, prefixed with | |
469 | <literal>vz-</literal>. This option corresponds to the <option>--network-zone=</option> command line | |
470 | switch. This option is privileged (see above).</para></listitem> | |
471 | </varlistentry> | |
472 | ||
f757855e LP |
473 | <varlistentry> |
474 | <term><varname>Port=</varname></term> | |
475 | ||
476 | <listitem><para>Exposes a TCP or UDP port of the container on | |
477 | the host. This option corresponds to the | |
478 | <option>--port=</option> command line switch, see | |
479 | <citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
480 | for the precise syntax of the argument this option takes. This | |
481 | option is privileged (see above).</para></listitem> | |
482 | </varlistentry> | |
483 | </variablelist> | |
484 | </refsect1> | |
485 | ||
486 | <refsect1> | |
487 | <title>See Also</title> | |
488 | <para> | |
489 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
490 | <citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
491 | <citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry> | |
492 | </para> | |
493 | </refsect1> | |
494 | ||
495 | </refentry> |