Hi Sofi, Matthew, that's right, qcow2 images will not trigger the bug, as the image must be converted to raw prior to import - which prevents a COW clone from occurring. To reproduce this you need glance and cinder both using the same ceph cluster, an image in glance that has 'disk-format' equal to 'raw', and then simply create a volume from that image. The raw format glance image will allow cinder to call clone(), and this is where the issue arises.
Hi Sofi, Matthew, that's right, qcow2 images will not trigger the bug, as the image must be converted to raw prior to import - which prevents a COW clone from occurring. To reproduce this you need glance and cinder both using the same ceph cluster, an image in glance that has 'disk-format' equal to 'raw', and then simply create a volume from that image. The raw format glance image will allow cinder to call clone(), and this is where the issue arises.