Bug 1041289

Summary: [RFE][nova]: Implement RBD snapshots instead of QEMU snapshots
Product: Red Hat OpenStack Reporter: RHOS Integration <rhos-integ>
Component: RFEsAssignee: RHOS Maint <rhos-maint>
Status: CLOSED UPSTREAM QA Contact:
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: unspecifiedCC: markmc, yeylon
Target Milestone: ---Keywords: FutureFeature
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
URL: https://blueprints.launchpad.net/nova/+spec/implement-rbd-snapshots-instead-of-qemu-snapshots
Whiteboard: upstream_milestone_none upstream_status_unknown upstream_definition_drafting
Fixed In Version: Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-03-19 17:18:00 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description RHOS Integration 2013-12-12 14:16:04 UTC 
Cloned from launchpad blueprint https://blueprints.launchpad.net/nova/+spec/implement-rbd-snapshots-instead-of-qemu-snapshots.

Description:

Since Havana, Nova supports libvirt_image_type=rbd. This means that you can directly and transparently (for the user) boot VM into Ceph.

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.

Specification URL (additional information):

None