nspawn: add new --tmpfs= option to mount a tmpfs on specific directories, such as...

[elogind.git] / man / systemd-nspawn.xml

diff --git a/man/systemd-nspawn.xml b/man/systemd-nspawn.xml
index 1ad8e6ec056fb2ed9a33ca689d5808783776b704..d6687038af68467bc3adb42d210a71e889ca12bf 100644 (file)
--- a/man/systemd-nspawn.xml
+++ b/man/systemd-nspawn.xml
@@ -358,7 +358,7 @@
                                 <option>--network-bridge=</option>
                                 implies
                                 <option>--network-veth</option>. If
                                 <option>--network-bridge=</option>
                                 implies
                                 <option>--network-veth</option>. If

-                                this option is used the host side of
+                                this option is used, the host side of

                                 the Ethernet link will use the
                                 <literal>vb-</literal> prefix instead
                                 of <literal>ve-</literal>.</para></listitem>
                                 the Ethernet link will use the
                                 <literal>vb-</literal> prefix instead
                                 of <literal>ve-</literal>.</para></listitem>


@@ -503,6 +503,30 @@
                                 mounts.</para></listitem>
                         </varlistentry>
 
                                 mounts.</para></listitem>
                         </varlistentry>
 

+                        <varlistentry>
+                                <term><option>--tmpfs=</option></term>
+
+                                <listitem><para>Mount a tmpfs file
+                                system into the container. Takes a
+                                single absolute path argument that
+                                specifies where to mount the tmpfs
+                                instance to (in which case the
+                                directory access mode will be chosen
+                                as 0755, owned by root/root), or
+                                optionally a colon-separated pair of
+                                path and mount option string, that is
+                                used for mounting (in which case the
+                                kernel default for access mode and
+                                owner will be chosen, unless otherwise
+                                specified). This option is
+                                particularly useful for mounting
+                                directories such as
+                                <filename>/var</filename> as tmpfs, to
+                                allow state-less systems, in
+                                particular when combined with
+                                <option>--read-only</option>.</para></listitem>
+                        </varlistentry>
+

                         <varlistentry>
                                 <term><option>--setenv=</option></term>
 
                         <varlistentry>
                                 <term><option>--setenv=</option></term>
 


@@ -601,7 +625,7 @@
                                 <literal>x86-64</literal> are
                                 supported. This is useful when running
                                 a 32-bit container on a 64-bit
                                 <literal>x86-64</literal> are
                                 supported. This is useful when running
                                 a 32-bit container on a 64-bit

-                                host. If this setting is not used
+                                host. If this setting is not used,

                                 the personality reported in the
                                 container is the same as the one
                                 reported on the
                                 the personality reported in the
                                 container is the same as the one
                                 reported on the