add api to support flattening volume
Registered by
Cheng Li
CEPH is the well known backend of cinder volume. Cinder supports creating copy-on-write volume from snapshot.[1]
For example, volumeA -> snapshotA -> volumeB.
Now the user wants to delete volumeA and snapshotA, as they will not use them.
But they are not able to delete them. Because volumeB depends on them in CEPH layer.
If the user flattens volumeB in CEPH, then he/she will be able to delete volumeB.
We can add the flatten api in cinder, so that the user doesn't have to operate CEPH directly.
[1] http://
Blueprint information
- Status:
- Complete
- Approver:
- None
- Priority:
- Undefined
- Drafter:
- Cheng Li
- Direction:
- Needs approval
- Assignee:
- Cheng Li
- Definition:
- Obsolete
- Series goal:
- None
- Implementation:
-
Unknown
- Milestone target:
- None
- Started by
- Completed by
- Sean McGinnis
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We will not expose an API through Cinder specifically for one type of backend. If anything, the ceph driver should be updated to just handle this situation correctly.
(?)
