Currently is not possible to delete a consistency group snapshot on the SolidFire Cinder driver. The fix[1] is already merged on master release and a backport to Rocky[2] is already on fight. [1] https://review.openstack.org/598193 [2] https://review.openstack.org/602088
Backport to Queens is merged: https://review.openstack.org/607662
OtherQA no access to such a storage to verify.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2018:3601