After having played around a bit with LXC and discovered its main features, you may want to have a proper network setup for your containers.

There are multiple network setups possible and multiple ways to implement them. In this post, we are going to setup a bridge, using lxc-net. It requires very little configuration and should be enough for a simple LXC architecture.

More details about this bridge setup:

• Containers will have an IPv4 within their own subnet
• Containers will be able to access each other within this subnet
• The host will be able to access the containers trough this subnet
• Containers will have access to the internet thanks to the bridge interface

Note that I’m using Debian 9 for this tutorial. Also, if you’re using LXD to manage your LXC containers, this isn’t necessary as it does everything automatically.

Munin has plugins that allow us to get nice graphs of the DNS queries made to Unbound on the machine. However, they aren’t working by default!

This tutorial assumes Munin and Unbound are already configured and working on your server. I’m using Debian 8 and 9, but it should work on Ubuntu, and certainly most distributions.