Create and maintain virtual machines from a concise configuration.

This projects help maintain throw-away virtual machines (vm) in a simple and
consistent way.

It collects various recipes used to build virtual machines for different
virtualization tools (kvm, lxc, nova and lxd) and relies on cloud-init and
ssh access.

Virtual machines are described in a configuration file capturing their
definition in a few lines and allowing image-based workflows to be defined
by chaining vms definitions.