The OCP deployer will request using Designate within the standard openshift-ansible configuration. This includes configuring the desired domain of the OCP cluster (but this has to happen in all OCP deployments). They will use openshift-ansible to deploy OCP.
This will succeed, but they will have to configure the API and wildcard public DNS entries to make the cluster accessible.
After a technical discussion on internal DNS resolution in OpenShift between Neutron DNS or Designate we will focus on Neutron DNS and not Designate for this use case.