Comment 6 for bug 1447215

This is purely a Glance bug and can be recreated without Nova in the picture at all, therefore I do not believe that the bug fix mentioned in comment 5 will fix this.

See the recreation steps in comment 2. This can be completely abstracted from Nova. The bug is that Glance v1 allows you to set properties with no value, while Glance v2 uses schema validation and validates that those same 2 properties MUST have a string value.

After that point, once you bring Nova into the picture, snapshot images created with libvirt in Nova will have an issue once Nova moves to use Glance v2 for all image access. This is because kernel_id and ramdisk_id can be set to no value on images created in earlier releases using Glance v1 and the Glance image list/ show APIs will fail on those images.