Alpine Linux and lxd are perfect together, especially if combined with a good file system. Let’s see how to install them on a btrfs file system.
One of the interesting features of BTRFS is the dynamic snapshot generation, which grantees the possibility to have a perfect and immediate copy of a specific path.
I've been using BTRFS for years and I've had few problems. Some of them are small and can be avoided with some smart improvements.