On Tue, Jan 22, 2019 at 07:04:05PM +0100, Ignazio Cassano wrote:
> Hi All,
> Please,  I' d like to know if cinder backup  and/or  cinder snapshot call
> qemu guest agent for fsfreezing.
> If Yes, does it freeze file systems in the volume?
> Regards
> Ignazio

Unfortunately no, initiating a snapshot or backup from Cinder does not call out
to Nova to do any guest quiescing. There would need to be something else
coordinating the calls between the guest OS and initiating the Cinder snapshot
to do that.

Sean