I believe this may be a dupe of an existing bug where atomic doesn't support auth just get and we're waiting on a new build of atomic before we can add auth support.
yes indeed. There are already some PRs to cover this, so I am going to close it and mark as a duplicate
*** This bug has been marked as a duplicate of bug 1505744 ***
this is the fix for master:
The proposed PR#6646 was already merged into openshift-ansible-3.9.0-0.20.0.git.0.dce44f0.el7.noarch. Move this bug to ON_QA.
Verify this bug with openshift-ansible-3.9.0-0.20.0.git.0.dce44f0.el7.noarch.rpm.
Enable docker system container in ansible inventory
Run playbook prerequisites.yml, it could pull Container Engine System Container image from an authenticated registry without error.