This integration allows you to develop HaLVMs on a wider variety of platforms, by using Docker as a base. Obviously, unless you have Docker and Xen running together and playing nice, you won’t be able to test the things you build directly … but you can build them, and then potentially ship them off to other machines for testing.
Have a HaLVM / Docker use case? I’d love to hear it. Got any suggestions for other ways we could package the HaLVM? I’d also love to hear that.