mirror of
https://github.com/systemd/systemd-stable.git
synced 2024-12-24 21:34:08 +03:00
12b42c7667
This did not really work out as we had hoped. Trying to do this upstream introduced several problems that probably makes it better suited as a downstream patch after all. At any rate, it is not releaseable in the current state, so we at least need to revert this before the release. * by adjusting the path to binaries, but not do the same thing to the search path we end up with inconsistent man-pages. Adjusting the search path too would be quite messy, and it is not at all obvious that this is worth the effort, but at any rate it would have to be done before we could ship this. * this means that distributed man-pages does not make sense as they depend on config options, and for better or worse we are still distributing man pages, so that is something that definitely needs sorting out before we could ship with this patch. * we have long held that split-usr is only minimally supported in order to boot, and something we hope will eventually go away. So before we start adding even more magic/effort in order to make this work nicely, we should probably question if it makes sense at all.
370 lines
17 KiB
XML
370 lines
17 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
|
|
|
<!--
|
|
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.mount">
|
|
<refentryinfo>
|
|
<title>systemd.mount</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.mount</refentrytitle>
|
|
<manvolnum>5</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>systemd.mount</refname>
|
|
<refpurpose>Mount unit configuration</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<para><filename><replaceable>mount</replaceable>.mount</filename></para>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para>A unit configuration file whose name ends in
|
|
<literal>.mount</literal> encodes information about a file system
|
|
mount point controlled and supervised by systemd.</para>
|
|
|
|
<para>This man page lists the configuration options specific to
|
|
this unit type. See
|
|
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for the common options of all unit configuration files. The common
|
|
configuration items are configured in the generic [Unit] and
|
|
[Install] sections. The mount specific configuration options are
|
|
configured in the [Mount] section.</para>
|
|
|
|
<para>Additional options are listed in
|
|
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
which define the execution environment the
|
|
<citerefentry project='man-pages'><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
|
binary is executed in, and in
|
|
<citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
which define the way the processes are terminated, and in
|
|
<citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
which configure resource control settings for the processes of the
|
|
service. Note that the User= and Group= options are not
|
|
particularly useful for mount units specifying a
|
|
<literal>Type=</literal> option or using configuration not
|
|
specified in <filename>/etc/fstab</filename>;
|
|
<citerefentry project='man-pages'><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
|
will refuse options that are not listed in
|
|
<filename>/etc/fstab</filename> if it is not run as UID 0.</para>
|
|
|
|
<para>Mount units must be named after the mount point directories
|
|
they control. Example: the mount point
|
|
<filename noindex='true'>/home/lennart</filename> must be
|
|
configured in a unit file <filename>home-lennart.mount</filename>.
|
|
For details about the escaping logic used to convert a file system
|
|
path to a unit name, see
|
|
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
|
|
|
|
<para>Optionally, a mount unit may be accompanied by an automount
|
|
unit, to allow on-demand or parallelized mounting. See
|
|
<citerefentry><refentrytitle>systemd.automount</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
|
|
|
|
<para>If a mount point is beneath another mount point in the file
|
|
system hierarchy, a dependency between both units is created
|
|
automatically.</para>
|
|
|
|
<para>Mount points created at runtime (independently of unit files
|
|
or <filename>/etc/fstab</filename>) will be monitored by systemd
|
|
and appear like any other mount unit in systemd. See
|
|
<filename>/proc/self/mountinfo</filename> description in
|
|
<citerefentry project='man-pages'><refentrytitle>proc</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
|
|
</para>
|
|
|
|
<para>Some file systems have special semantics as API file systems
|
|
for kernel-to-userspace and userspace-to-userspace interfaces. Some
|
|
of them may not be changed via mount units, and cannot be
|
|
disabled. For a longer discussion see <ulink
|
|
url="http://www.freedesktop.org/wiki/Software/systemd/APIFileSystems">API
|
|
File Systems</ulink>.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title><filename>fstab</filename></title>
|
|
|
|
<para>Mount units may either be configured via unit files, or via
|
|
<filename>/etc/fstab</filename> (see
|
|
<citerefentry project='man-pages'><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for details). Mounts listed in <filename>/etc/fstab</filename>
|
|
will be converted into native units dynamically at boot and when
|
|
the configuration of the system manager is reloaded. In general,
|
|
configuring mount points through <filename>/etc/fstab</filename>
|
|
is the preferred approach. See
|
|
<citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
|
for details about the conversion.</para>
|
|
|
|
<para>When reading <filename>/etc/fstab</filename> a few special
|
|
mount options are understood by systemd which influence how
|
|
dependencies are created for mount points. systemd will create a
|
|
dependency of type <option>Wants</option> or
|
|
<option>Requires</option> (see option <option>nofail</option>
|
|
below), from either <filename>local-fs.target</filename> or
|
|
<filename>remote-fs.target</filename>, depending whether the file
|
|
system is local or remote.</para>
|
|
|
|
<variablelist class='fstab-options'>
|
|
|
|
<varlistentry>
|
|
<term><option>x-systemd.requires=</option></term>
|
|
|
|
<listitem><para>Configures a <varname>Requires=</varname> and
|
|
an <varname>After=</varname> dependency between the created
|
|
mount unit and another systemd unit, such as a device or mount
|
|
unit. The argument should be a unit name, or an absolute path
|
|
to a device node or mount point. This option may be specified
|
|
more than once. This option is particularly useful for mount
|
|
point declarations that need an additional device to be around
|
|
(such as an external journal device for journal file systems)
|
|
or an additional mount to be in place (such as an overlay file
|
|
system that merges multiple mount points). See
|
|
<varname>After=</varname> and <varname>Requires=</varname> in
|
|
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for details.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>x-systemd.requires-mounts-for=</option></term>
|
|
|
|
<listitem><para>Configures a
|
|
<varname>RequiresMountsFor=</varname> dependency between the
|
|
created mount unit and other mount units. The argument must be
|
|
an absolute path. This option may be specified more than once.
|
|
See <varname>RequiresMountsFor=</varname> in
|
|
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for details.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>x-systemd.automount</option></term>
|
|
|
|
<listitem><para>An automount unit will be created for the file
|
|
system. See
|
|
<citerefentry><refentrytitle>systemd.automount</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for details.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>x-systemd.idle-timeout=</option></term>
|
|
|
|
<listitem><para>Configures the idleness timeout of the
|
|
automount unit. See <varname>TimeoutIdleSec=</varname> in
|
|
<citerefentry><refentrytitle>systemd.automount</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for details.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>x-systemd.device-timeout=</option></term>
|
|
|
|
<listitem><para>Configure how long systemd should wait for a
|
|
device to show up before giving up on an entry from
|
|
<filename>/etc/fstab</filename>. Specify a time in seconds or
|
|
explicitly append a unit as <literal>s</literal>,
|
|
<literal>min</literal>, <literal>h</literal>,
|
|
<literal>ms</literal>.</para>
|
|
|
|
<para>Note that this option can only be used in
|
|
<filename>/etc/fstab</filename>, and will be
|
|
ignored when part of <varname>Options=</varname>
|
|
setting in a unit file.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>noauto</option></term>
|
|
<term><option>auto</option></term>
|
|
|
|
<listitem><para>With <option>noauto</option>, this mount will
|
|
not be added as a dependency for
|
|
<filename>local-fs.target</filename> or
|
|
<filename>remote-fs.target</filename>. This means that it will
|
|
not be mounted automatically during boot, unless it is pulled
|
|
in by some other unit. Option <option>auto</option> has the
|
|
opposite meaning and is the default.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>nofail</option></term>
|
|
|
|
<listitem><para>With <option>nofail</option> this mount will
|
|
be only wanted, not required, by
|
|
<filename>local-fs.target</filename> or
|
|
<filename>remote-fs.target</filename>. This means that the
|
|
boot will continue even if this mount point is not mounted
|
|
successfully.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>x-initrd.mount</option></term>
|
|
|
|
<listitem><para>An additional filesystem to be mounted in the
|
|
initramfs. See <filename>initrd-fs.target</filename>
|
|
description in
|
|
<citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry>.
|
|
</para></listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
|
|
<para>If a mount point is configured in both
|
|
<filename>/etc/fstab</filename> and a unit file that is stored
|
|
below <filename>/usr</filename>, the former will take precedence.
|
|
If the unit file is stored below <filename>/etc</filename>, it
|
|
will take precedence. This means: native unit files take
|
|
precedence over traditional configuration files, but this is
|
|
superseded by the rule that configuration in
|
|
<filename>/etc</filename> will always take precedence over
|
|
configuration in <filename>/usr</filename>.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Options</title>
|
|
|
|
<para>Mount files must include a [Mount] section, which carries
|
|
information about the file system mount points it supervises. A
|
|
number of options that may be used in this section are shared with
|
|
other unit types. These options are documented in
|
|
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
and
|
|
<citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
|
|
The options specific to the [Mount] section of mount units are the
|
|
following:</para>
|
|
|
|
<variablelist class='unit-directives'>
|
|
|
|
<varlistentry>
|
|
<term><varname>What=</varname></term>
|
|
<listitem><para>Takes an absolute path of a device node, file
|
|
or other resource to mount. See
|
|
<citerefentry project='man-pages'><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
|
for details. If this refers to a device node, a dependency on
|
|
the respective device unit is automatically created. (See
|
|
<citerefentry><refentrytitle>systemd.device</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for more information.) This option is
|
|
mandatory.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>Where=</varname></term>
|
|
<listitem><para>Takes an absolute path of a directory of the
|
|
mount point. If the mount point does not exist at the time of
|
|
mounting, it is created. This string must be reflected in the
|
|
unit filename. (See above.) This option is
|
|
mandatory.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>Type=</varname></term>
|
|
<listitem><para>Takes a string for the file system type. See
|
|
<citerefentry project='man-pages'><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
|
for details. This setting is optional.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>Options=</varname></term>
|
|
|
|
<listitem><para>Mount options to use when mounting. This takes
|
|
a comma-separated list of options. This setting is
|
|
optional.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>SloppyOptions=</varname></term>
|
|
|
|
<listitem><para>Takes a boolean argument. If true, parsing of
|
|
the options specified in <varname>Options=</varname> is
|
|
relaxed, and unknown mount options are tolerated. This
|
|
corresponds with
|
|
<citerefentry project='man-pages'><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>'s
|
|
<parameter>-s</parameter> switch. Defaults to
|
|
off.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>DirectoryMode=</varname></term>
|
|
<listitem><para>Directories of mount points (and any parent
|
|
directories) are automatically created if needed. This option
|
|
specifies the file system access mode used when creating these
|
|
directories. Takes an access mode in octal notation. Defaults
|
|
to 0755.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>TimeoutSec=</varname></term>
|
|
<listitem><para>Configures the time to wait for the mount
|
|
command to finish. If a command does not exit within the
|
|
configured time, the mount will be considered failed and be
|
|
shut down again. All commands still running will be terminated
|
|
forcibly via <constant>SIGTERM</constant>, and after another
|
|
delay of this time with <constant>SIGKILL</constant>. (See
|
|
<option>KillMode=</option> in
|
|
<citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>.)
|
|
Takes a unit-less value in seconds, or a time span value such
|
|
as "5min 20s". Pass 0 to disable the timeout logic. The
|
|
default value is set from the manager configuration file's
|
|
<varname>DefaultTimeoutStart=</varname>
|
|
variable.</para></listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
|
|
<para>Check
|
|
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
and
|
|
<citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for more settings.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.device</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
<citerefentry project='man-pages'><refentrytitle>proc</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
<citerefentry project='man-pages'><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|