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man: document that nspawn's host0 and ve-* interfaces have default config in networkd

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Lennart Poettering 2016-05-06 20:50:16 +02:00
parent 7be8fb7bfc
commit 5e7423ff25
1 changed files with 21 additions and 15 deletions
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36
man/systemd-nspawn.xml
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@ -524,15 +524,23 @@
<term><option>-n</option></term>
<term><option>--network-veth</option></term>
<listitem><para>Create a virtual Ethernet link
(<literal>veth</literal>) between host and container. The host
side of the Ethernet link will be available as a network
interface named after the container's name (as specified with
<option>--machine=</option>), prefixed with
<literal>ve-</literal>. The container side of the Ethernet
link will be named <literal>host0</literal>. Note that
<option>--network-veth</option> implies
<option>--private-network</option>.</para></listitem>
<listitem><para>Create a virtual Ethernet link (<literal>veth</literal>) between host and container. The host
side of the Ethernet link will be available as a network interface named after the container's name (as
specified with <option>--machine=</option>), prefixed with <literal>ve-</literal>. The container side of the
Ethernet link will be named <literal>host0</literal>. The <option>--network-veth</option> option implies
<option>--private-network</option>.</para>
<para>Note that
<citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
includes by default a network file <filename>/usr/lib/systemd/network/80-container-ve.network</filename>
matching the host-side interfaces created this way, which contains settings to enable automatic address
provisioning on the created virtual link via DHCP, as well as automatic IP routing onto the host's external
network interfaces. It also contains <filename>/usr/lib/systemd/network/80-container-host0.network</filename>
matching the container-side interface created this way, containing settings to enable client side address
assignment via DHCP. In case <filename>systemd-networkd</filename> is running on both the host and inside the
container, automatic IP communication from the container to the host is thus available, with further
connectivity to the external network.</para>
</listitem>
</varlistentry>
<varlistentry>
@ -553,12 +561,10 @@
<varlistentry>
<term><option>--network-bridge=</option></term>
<listitem><para>Adds the host side of the Ethernet link
created with <option>--network-veth</option> to the specified
bridge. Note that <option>--network-bridge=</option> implies
<option>--network-veth</option>. If this option is used, the
host side of the Ethernet link will use the
<literal>vb-</literal> prefix instead of
<listitem><para>Adds the host side of the Ethernet link created with <option>--network-veth</option> to the
specified Ethernet bridge interface. Expects a valid network interface name of a bridge device as
argument. Note that <option>--network-bridge=</option> implies <option>--network-veth</option>. If 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>
</varlistentry>