For those not aware ansible has been deprecated in RHEL7 from the extras repository. In the RHEL specific world it's now in an optional "product" (basically an optional subscription) that is part of any RHEL subscription, but it's opt in. As a result ansible is back in the EPEL7 repository for 2.5.0+ , having been removed for ansible 2.4.2 when it got introduced to the RHEL extras repo. I have no idea what, if anything, the CentOS team will do with the ansible in the CentOS7 extras repository.