• Scripted generation of an Arch Linux docker image:

$ cd lib/arch-install-scripts
$ make
$ cd ../../
$ sudo ./mkimage-arch.sh

• Creating a custom image, based on the above one (authorized_keys and key need to be properly set, e.g. with ssh-keygen):

$ docker build -t custom .

The container is then started with vagrant up and may be accessed with vagrant ssh.