I have been using CoreOS for a little while and like the environment I get when running etcd, fleet and flannel. I would like to use these services in a production environment to create a docker cluster. However using CoreOS machines is not an option for me, as will be working on servers running Ubuntu (and replacing the OS is not an option). Is it possible to run etcd, fleet and flannel on ubuntu machines to create ubuntu machines that will behave like CoreOS machines?
If not I was considering just running CoreOS vagrant boxes inside of my servers instead.