The datahub-frontend and datahub-gms services, defined in hieradata/common/service.yaml, points to both the codfw and eqiad datacenters. As we're planning to move datahub to dse-k8s-eqiad, we need to make these services point to eqiad only.
I think we'd need to do this before doing anything else DNS related. To be confirmed with #wikimedia-traffic.