summaryrefslogtreecommitdiffstats
path: root/man/systemd-volatile-root.service.xml
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--man/systemd-volatile-root.service.xml55
1 files changed, 55 insertions, 0 deletions
diff --git a/man/systemd-volatile-root.service.xml b/man/systemd-volatile-root.service.xml
new file mode 100644
index 0000000..651832f
--- /dev/null
+++ b/man/systemd-volatile-root.service.xml
@@ -0,0 +1,55 @@
+<?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">
+<!--
+ SPDX-License-Identifier: LGPL-2.1+
+-->
+<refentry id="systemd-volatile-root.service">
+
+ <refentryinfo>
+ <title>systemd-volatile-root.service</title>
+ <productname>systemd</productname>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>systemd-volatile-root.service</refentrytitle>
+ <manvolnum>8</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>systemd-volatile-root.service</refname>
+ <refname>systemd-volatile-root</refname>
+ <refpurpose>Make the root file system volatile</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <para><filename>systemd-volatile-root.service</filename></para>
+ <para><filename>/usr/lib/systemd/systemd-volatile-root</filename></para>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><filename>systemd-volatile-root.service</filename> is a service that replaces the root directory with a
+ volatile memory file system (<literal>tmpfs</literal>), mounting the original (non-volatile)
+ <filename>/usr</filename> inside it read-only. This way, vendor data from <filename>/usr</filename> is available as
+ usual, but all configuration data in <filename>/etc</filename>, all state data in <filename>/var</filename> and all
+ other resources stored directly under the root directory are reset on boot and lost at shutdown, enabling fully
+ stateless systems.</para>
+
+ <para>This service is only enabled if full volatile mode is selected, for example by specifying
+ <literal>systemd.volatile=yes</literal> on the kernel command line. This service runs only in the initial RAM disk
+ ("initrd"), before the system transitions to the host's root directory. Note that this service is not used if
+ <literal>systemd.volatile=state</literal> is used, as in that mode the root directory is non-volatile.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>kernel-command-line</refentrytitle><manvolnum>7</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>