Add SELinux support to systemd-nspawn

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

diff --git a/man/systemd-nspawn.xml b/man/systemd-nspawn.xml
index 7d450f912c1c617c17d6bd41a32eb0d87374963a..08b0457d16298d3395894391de82e60085e0b135 100644 (file)
--- a/man/systemd-nspawn.xml
+++ b/man/systemd-nspawn.xml
@@ -123,10 +123,10 @@
                 see each other. The PID namespace separation of the
                 two containers is complete and the containers will
                 share very few runtime objects except for the
-                underlying file system. It is however possible to
-                enter an existing container, see
-                <link linkend='example-nsenter'>Example 4</link> below.
-                </para>
+                underlying file system. Use
+                <citerefentry><refentrytitle>machinectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>'s
+                <command>login</command> command to request an
+                additional login prompt in a running container.</para>
 
                 <para><command>systemd-nspawn</command> implements the
                 <ulink
@@ -248,6 +248,27 @@
                                 </listitem>
                         </varlistentry>
 
+                        <varlistentry>
+                                <term><option>-L</option></term>
+                                <term><option>--file-label=</option></term>
+
+                                <listitem><para>Sets the mandatory
+                                access control (MAC) file label to be
+                                used by tmpfs file systems in the
+                                container.</para>
+                                </listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><option>-Z</option></term>
+                                <term><option>--process-label=</option></term>
+
+                                <listitem><para>Sets the mandatory
+                                access control (MAC) label to be used by
+                                processes in the container.</para>
+                                </listitem>
+                        </varlistentry>
+
                         <varlistentry>
                                 <term><option>--uuid=</option></term>
 
@@ -303,6 +324,16 @@
                                 CAP_AUDIT_CONTROL.</para></listitem>
                         </varlistentry>
 
+                        <varlistentry>
+                                <term><option>--drop-capability=</option></term>
+
+                                <listitem><para>Specify one or more
+                                additional capabilities to drop for
+                                the container. This allows running the
+                                container with fewer capabilities than
+                                the default (see above).</para></listitem>
+                        </varlistentry>
+
                         <varlistentry>
                                 <term><option>--link-journal=</option></term>
 
@@ -370,6 +401,21 @@
                                 creates read-only bind
                                 mount.</para></listitem>
                         </varlistentry>
+
+                        <varlistentry>
+                                <term><option>--setenv=</option></term>
+
+                                <listitem><para>Specifies an
+                                environment variable assignment to
+                                pass to the init process in the
+                                container, in the format
+                                <literal>NAME=VALUE</literal>. This
+                                may be used to override the default
+                                variables or to set additional
+                                variables. This parameter may be used
+                                more than once.</para></listitem>
+                        </varlistentry>
+
                 </variablelist>
 
         </refsect1>
@@ -409,22 +455,35 @@
                 boots an OS in a namespace container in it.</para>
         </refsect1>
 
-        <refsect1 id='example-nsenter'>
+        <refsect1>
                 <title>Example 4</title>
 
-                <para>To enter the container, PID of one of the
-                processes sharing the new namespaces must be used.
-                <command>systemd-nspawn</command> prints the PID
-                (as viewed from the outside) of the launched process,
-                and it can be used to enter the container.</para>
+                <programlisting># mv ~/arch-tree /var/lib/container/arch
+# systemctl enable systemd-nspawn@arch.service
+# systemctl start systemd-nspawn@arch.service</programlisting>
+
+                <para>This makes the Arch Linux container part of the
+                <filename>multi-user.target</filename> on the host.
+                </para>
+        </refsect1>
+
+        <refsect1>
+                <title>Example 5</title>
+
+                <programlisting># btrfs subvolume snapshot / /.tmp
+# systemd-nspawn --private-network -D /.tmp -b</programlisting>
+
+                <para>This runs a copy of the host system in a
+                btrfs snapshot.</para>
+        </refsect1>
+
+        <refsect1>
+                <title>Example 6</title>
 
-                <programlisting># nsenter -m -u -i -n -p -t $PID</programlisting>
+                <programlisting># chcon system_u:object_r:svirt_sandbox_file_t:s0:c0,c1 -R /srv/container
+# systemd-nspawn -L system_u:object_r:svirt_sandbox_file_t:s0:c0,c1 -Z system_u:system_r:svirt_lxc_net_t:s0:c0,c1 -D /srv/container /bin/sh</programlisting>
 
-                <para><citerefentry><refentrytitle>nsenter</refentrytitle><manvolnum>1</manvolnum></citerefentry>
-                is part of
-                <ulink url="https://github.com/karelzak/util-linux">util-linux</ulink>.
-                Kernel support for entering namespaces was added in
-                Linux 3.8.</para>
+                <para>This runs a container with SELinux sandbox labels.</para>
         </refsect1>
 
         <refsect1>
@@ -439,11 +498,11 @@
                 <para>
                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
                         <citerefentry><refentrytitle>chroot</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
-                        <citerefentry><refentrytitle>unshare</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
                         <citerefentry><refentrytitle>yum</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
                         <citerefentry><refentrytitle>debootstrap</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
                         <citerefentry><refentrytitle>pacman</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
-                        <citerefentry><refentrytitle>systemd.slice</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+                        <citerefentry><refentrytitle>systemd.slice</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+                        <citerefentry><refentrytitle>machinectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
                 </para>
         </refsect1>