It seems that recent minikube versions changed something in the
networking, and that prevents
$ ceph fs subvolumegroup create myfs testGroup
from working. Strangely RBD is not impacted. Possibly something is
confusing the CephMgr pod that handles the CephFS admin commands.
Using the "bridge" CNI seems to help, CephFS admin commands work with
this in minikube.
Signed-off-by: Niels de Vos <ndevos@redhat.com>