** Also affects: glance/ussuri
Importance: Undecided
Status: New
** Also affects: glance/victoria
Importance: High
Status: In Progress
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https://bugs.launchpad.net/bugs/1885003
Title:
Interrupted copy-image may break a subsequent operation
Status in Glance:
In Progress
Status in Glance ussuri series:
New
Status in Glance victoria series:
In Progress
Bug description:
Consider this scenario:
1. Upload image to glance to one store, everything is good
2. Start an image_import(method='copy-image') to copy the image to another
store
3. Power failure, network failure, or `killall -9 glance-api`
4. After the failure, re-request the copy-to-store
At this point, one of two cases will happen (we think) depending on
the copy request:
5a. If all_stores_must_succeed=False, then we will see the partial staging
residue, try to copy it to the store
6a. After we copy what was in the staging area to the new store, we will
compare the size to that of the actual image, see that it is wrong and fail the
operation
7a. The residue in the staging area will be deleted, but the storage on the
backend will neither be updated in locations nor deleted, which is a LEAK (bad).
8a. The user could retry and it should succeed this time because the staging
residue is gone, but the storage was leaked in the above step.
the other option is:
5b. If all_stores_must_succeed=True, then we will see the partial staging
residue, try to copy it to the store
6b. After we copy what was in the staging area to the new store and compare
the size, we will fail the operation
7b. We will not delete the residue from the staging dir, but _will_ delete
the backend storage, avoiding the leak.
8b. The user will retry, which will repeat the same and fail again, over and
over.
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