package iscsitarget-dkms is missing for nova-volume to work.
Added to https://github.com/cloudbuilders/devstack/blob/master/files/apts/nova#L43
another missing dependence which affects volume working from nova-compute side is 'iscsiadm' utility from 'open-iscsi-utils' package.
again, another missing package is founded. 'open-iscsi', don't forget to about it.
Fix committed in https://review.openstack.org/2271
Bug watches keep track of this bug in other bug trackers.
Added to https:/ /github. com/cloudbuilde rs/devstack/ blob/master/ files/apts/ nova#L43