Proposed change text wiki page is here:
In a nutshell, to support Ceph and Gluster as options for Kubernetes Persistent Volumes, the clients need to be available on the host. I'm chasing down a few options at the moment, but the quick and easy way is to add the packages into the compose list. I've got a line (from mmcgrath) on an alternate option and will pursue it but no info on that right now.
The GlusterFS client add 4 packages to the base.
The Ceph is a bit larger, but there is an issue with the dependency list that has already been reported and is being worked on to drop that number.