In OpenStack, a VM booted from a volume (where the disk is located on RBD) supports the live-migration without any problems.–––– Sébastien Han Cloud Engineer "Always give 100%. Unless you're giving blood." 
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On Jun 14, 2013, at 11:36 PM, Bo < bo@xxxxxxxxxxx> wrote: If I am not mistaken, one would need to modify OpenStack source to force Nova to boot from RBD volumes. Is this no longer the case?
Modifying OpenStack's source is a wonderful idea especially if you push your changes upstream for review. However, it does add to your work when you want to pull updated code from upstream into your deployment.
-bo
On 14.06.2013 12:55, Alvaro Izquierdo Jimeno wrote:
> By default, openstack uses NFS but… other options are available….can we
> use cephFS instead of NFS?
Wouldn't you use qemu-rbd for your virtual guests in OpenStack?
AFAIK CephFS is not needed for KVM/qemu virtual machines.
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