This playbook is run on master machine.
Should be resolved by: https://github.com/openshift/openshift-ansible/pull/3145
verified with dev's branch and it works, will change bug status to 'Verified' once it's merge to master branch.
verified on https://github.com/openshift/openshift-ansible master branch. Task can proceed, and all related key filed are generated.
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-2017:0903