The problem is that the RBD driver in Cinder only checks that the image is accessible and doesn't check its attributes to confirm that it's in raw format.
Grizzly: https://github.com/openstack/cinder/blob/stable/grizzly/cinder/volume/drivers/rbd.py#L243
Havana/Icehouse: https://github.com/openstack/cinder/blob/master/cinder/volume/drivers/rbd.py#L716
The problem is that the RBD driver in Cinder only checks that the image is accessible and doesn't check its attributes to confirm that it's in raw format.
Grizzly: /github. com/openstack/ cinder/ blob/stable/ grizzly/ cinder/ volume/ drivers/ rbd.py# L243
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Havana/Icehouse: /github. com/openstack/ cinder/ blob/master/ cinder/ volume/ drivers/ rbd.py# L716
https:/