Revert On Failure

Registered by Kiall Mac Innes

Many on central's methods can leave the storage and backend in-consistent due to the lack of cleanup performed when a backend raises an exception.

We should ensure all storage changes are reverted when a backend exception is raised.

Blueprint information

Status:
Complete
Approver:
Kiall Mac Innes
Priority:
Undefined
Drafter:
None
Direction:
Needs approval
Assignee:
Kiall Mac Innes
Definition:
Approved
Series goal:
Accepted for havana
Implementation:
Implemented
Milestone target:
None
Started by
Kiall Mac Innes
Completed by
Kiall Mac Innes

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Gerrit topic: https://review.openstack.org/#q,topic:bp/revert-on-failure,n,z

Addressed by: https://review.openstack.org/35960
    Ensure central cleans up storage if the backend fails

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