Paul, the purge has been added to purge_cluster.yml. Also, I'm fixing this bug here: github.com/ceph/ceph-ansible/pull/1931
Still in progress, fixing more bugs
will be in rc13, tomorrow
Verified in ceph-ansible-3.0.0-0.1.rc13.el7cp
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/RHBA-2017:3387