Comment 2 for bug 1653953

> My first thought on this is that the cloned image is flattened as part
> of direct_snapshot, so I'm interested in finding out why that's not
> sufficient for the image-delete to work.

That's the case when we shelve the instance but during unshelve we are just calling spawn and as a result we call for a clone on the imagebackend. Just the same as when we initially create an instance from an image.

> To investigate, I tried to repro this myself in devstack and am hitting
> multiple other bugs. I can't get it to complete the snapshot successfully
> and the instance does not get shelved.

Odd, I didn't see either of these in my F24 based env, I'll retry again today with the ref you used.