Working with Ceph from qemu-img
1qemu-img info -f rbd rbd:volumes/CW-ICE-Linux1.raw:conf=/etc/ceph/adleast.conf
1qemu-img convert -f vhdx -O raw server.vhdx rbd:volumes/TS11.raw:conf=/etc/ceph/adleast.conf
1qemu-img resize -f rbd "rbd:rbd/myrbd" 600G
http://cephnotes.ksperis.com/blog/2013/06/11/ceph-rbd-online-resize