I have some hosts in one availability zone, some hosts are solely based on LVM,
which means their root images will be sitting on LVM;
while other hosts are setup with GlusterFS, which means their root image will
be allocated on Gluster.
My question is: what's the best way to let VM
I think you can refer to following for more info
And this is mail list for developers ,so you can ask openstack mail list if