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 ccd3436d424869b0b4d7cd610a0d0d19b15184ea..d6687038af68467bc3adb42d210a71e889ca12bf 100644 (file)
--- a/man/systemd-nspawn.xml
+++ b/man/systemd-nspawn.xml
@@ -503,6 +503,30 @@
                                 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>