Description of problem: In luminous, by default no rbd pool will be created. But iscsi gateway service expect the pool to be present when it is starting. Should notify the user to create a rbd pool before starting "rbd-target-gw.service". Please include a warning to the same effect in the iSCSI configuration guide. Version-Release number of selected component (if applicable): [root@aircobra ~]# ceph -v ceph version 12.2.0-2.el7cp (3137b4f525c5dcc2a34fef5b0f6bcf4477312db9) luminous (rc) [root@aircobra ~]#