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extend docs/lxd_container_home_server_networking_for_dummies.md

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Trent Palmer
2018-02-20 22:19:29 +00:00
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MkDocs version : 0.17.2
Build Date UTC : 2018-02-18 11:34:12
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@@ -407,6 +407,41 @@ to a macvlan, addressable from your lan, just like any other arbitrary computer
your home network, and a second interface <em>eth1</em> connected to a non-natted subnet, with
a static ip on which it will be able to talk directly to the other containers and the host
machine.</p>
<h3 id="exposed-profile-with-a-regular-linux-br0-interface-bridge">exposed profile with a regular linux br0 interface bridge</h3>
<p>You can configure an Ubuntu server with a br0 interface</p>
<pre><code class="conf"># /etc/network/interfaces
auto lo
iface lo inet loopback
# br0 bridge in dhcp configuration with ethernet
# port ens2 added to it.
auto br0
iface br0 inet dhcp
bridge_ports ens2
bridge_stp off
bridge_maxwait 0
</code></pre>
<p>and a cooresponding profile....</p>
<pre><code class="yaml">config: {}
description: exposed LXD profile
devices:
eth0:
nictype: bridged
parent: br0
type: nic
eth1:
nictype: bridged
parent: lxdbr1
type: nic
root:
path: /
pool: default
type: disk
name: exposed
used_by: []
</code></pre>
<h2 id="assign-containers-to-profiles-and-configure-them-to-connect-correctly">Assign Containers to Profiles and configure them to connect correctly.</h2>
<p>There are a lot of different ways that a Linux instance can solicit network services. So for
now I will just describe a method that will work here for a lxc container from ubuntu:16.04, as
@@ -447,6 +482,37 @@ iface eth1 inet static
network 10.151.18.0
</code></pre>
<h3 id="ubuntu1604-using-only-dhcp-for-two-nics">ubuntu:16.04 using only dhcp for two nics</h3>
<p>So the example here is tested with eth0 and eth1 connected to
br0 and lxdbr1 respectively. You need post-up hooks for both eth0 and
eth1 inside the containers, in order to specify the default route, eth0 gets it's configuration
dynamically by default from cloud-init. So disable cloud-init by
creating the following file on the container.</p>
<pre><code class="conf"># /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg
network: {config: disabled}
</code></pre>
<p>Then, on the container describe the interfaces.</p>
<pre><code class="conf"># /etc/network/interfaces
auto lo
iface lo inet loopback
auto eth1
iface eth1 inet dhcp
post-up route del default dev eth1
auto eth0
iface eth0 inet dhcp
post-up route add default dev eth0 via 192.168.1.1
</code></pre>
<p>and delete /etc/network/interfaces.d/50-cloud-init.cfg</p>
<pre><code class="bash">rm /etc/network/interfaces.d/50-cloud-init.cfg
</code></pre>
<p>The advantage to this scenario is now you can make copies of the container
without having to update the network descriptions, because both interfaces
will solicit addresses via dhcp.</p>
<h3 id="debian-stretch">debian stretch</h3>
<p>The configuration for a debian stretch container is the same, except the the file
<code>/etc/network/interfaces</code> will also describe eth0, but you only have to add the

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