On 1/22/2019 12:45 PM, Sean McGinnis wrote:
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
If you snapshot a volume-backed server in nova the compute API will attempt to quiesce the guest before creating the snapshot of the volume: https://github.com/openstack/nova/blob/31956108e6e785407bdcc31dbc8ba99e6a28c... As for backups, the compute createBackup API does not support volume-backed servers: https://github.com/openstack/nova/blob/31956108e6e785407bdcc31dbc8ba99e6a28c... -- Thanks, Matt