RBD instance snapshots
Since Havana, Nova supports libvirt_
However when you perform a snapshot, Nova uses QEMU snapshots, which means that you always get a full block based snapshot. With Ceph backing up all the instances disk, it is really inefficient since the backup file will go locally on the hypervisor and then will be streamed to Glance and finally uploaded into Ceph (assuming Ceph is also backing Glance). From a performance perspective, it will be way easier to use Ceph RBD snapshot directly and much faster.
Blueprint information
- Status:
- Complete
- Approver:
- John Garbutt
- Priority:
- Low
- Drafter:
- Sébastien Han
- Direction:
- Approved
- Assignee:
- Nicolas Simonds
- Definition:
- Approved
- Series goal:
- Accepted for mitaka
- Implementation:
-
Implemented
- Milestone target:
-
mitaka-3
- Started by
- John Garbutt
- Completed by
- John Garbutt
Related branches
Related bugs
| Bug #1841160: With libvirt/images_type = rbd, ephemeral instances silently ignore hw_qemu_guest_agent=yes | Confirmed |
Sprints
Whiteboard
It is implemented, see https:/
Are you going to realize the bp just as what SÉBASTIEN HAN thought in site http://
If you are still working on this, please re-submit via nova-specs. If not, please mark as obsolete, and add a quick comment to describe why. --johnthetubaguy (20th April 2014)
Gerrit topic: https:/
Addressed by: https:/
Implement proper snapshotting for ceph-based ephemeral disks
Gerrit topic: https:/
Addressed by: https:/
RBD instance snapshots
Pending Patches
=============
Gerrit topic: https:/
Addressed by: https:/
libvirt: make snapshot use RBD snapshot/clone when available
Addressed by: https:/
libvirt: make snapshot use RBD snapshot/clone when available
