Comment 8 for bug 1653953

I wouldn't say that we leak images here, we still have references to the snapshot in Glance and can remove these later once the instance disk is flattened. We also end up in this situation when initially booting an instance from a rbd image, thus my reluctance to call this a genuine bug :

$ nova boot --image cirros-raw --flavor 1 test
[..]
$ sudo rbd -p vms ls -l
NAME SIZE PARENT FMT PROT LOCK
1987d04b-10ce-4724-80bc-3ba699a45ded_disk 1024M images/a906bdce-47e2-4eb1-abeb-5f390fc8493d@snap 2
$ glance image-delete a906bdce-47e2-4eb1-abeb-5f390fc8493d
Unable to delete image 'a906bdce-47e2-4eb1-abeb-5f390fc8493d' because it is in use.