Hello,
Indeed and interesting topic for the PTG, we are using the Swift backup driver and also had issues with backups timing out due to Keystone tokens of which we have done some work to mitigate.
Best regards Tobias
On 13 Mar 2023, at 17:11, Christian Rohmann christian.rohmann@inovex.de wrote:
Hey there,
On 06/03/2023 22:34, Nguyễn Hữu Khôi wrote:
I am looking for instance backup solution. I am using Cinder backup with nfs backup but it looks not too fast. I am using a 10Gbps network. I would like to know experience for best practice for instance backup solutions on Openstack.
On 13/03/2023 12:46, Eugen Block wrote:
We use Ceph as back end for all services (nova, glance, cinder), and the most important machines are backed up by our backup server directly via rbd commands:
There is RBD and "the other" drivers. While RBD uses the native export / import feature of Ceph, all other drivers (file, NFS, object storages like S3) are based on the abstract chunked driver (https://opendev.org/openstack/cinder/src/branch/master/cinder/backup/chunked...). This driver reads the volume / image and treats it as chunks before making use of a concrete driver (e.g. NFS or S3) to send those chunks off somewhere to be stored. Restore works just the opposite way. The performance of the chunked driver based back-ends is not (yet) comparable to what RBD can achieve due to various reasons.
But again, while "RBD" uses Ceph's mechanisms internally all other "targets" for backup storage work differently. We ourselves were looking into using and S3-compatible storage and thus I started a dicsussion about the state of those other drivers at https://lists.openstack.org/pipermail/openstack-discuss/2022-September/03026...
This then led to a discussion at the Cinder PTG https://etherpad.opendev.org/p/antelope-ptg-cinder#L119 with many observations.
There also are changes in the works, like restore into sparse volumes (https://review.opendev.org/c/openstack/cinder/+/852654) when going via the chunked driver. But also features like "encryption" (https://review.opendev.org/c/openstack/cinder-specs/+/862601) are being discussed.
Regards
Christian