Docker 0.7 runs on all Linux distributions
A few details on the "standard linux support" part.To remove the hard dependency on the AUFS patches, we moved it to an optional storage driver, and shipped a second driver which uses thin LVM snapshots (via libdevmapper) for copy-on-write. The big advantage of devicemapper/lvm, of course, is that it's part of the mainline kernel.If your system supports AUFS, Docker will continue to use the AUFS driver. Otherwise it will pick lvm. Either way, the image format is preserved and all images on the docker index (http://index.docker.io) or any instance of the open-source registry will continue to work on all drivers.It's pretty easy to develop new drivers, and there is a btrfs one on the way: https://github.com/shykes/docker/pull/65If you want to hack your own driver, there are basically 4 methods you need to implement: Create, Get, Remove and Cleanup. Take a look at the graphdriver/ package: https://github.com/dotcloud/docker/tree/master/graphdriverAs usual don't hesitate to come ask questions on IRC! #docker/freenode for users, #docker-dev/freenode for aspiring contributors.