I have two similar services/deployments/ingress running in two GKE/K8S namespaces: ns-A (old), ns-B (new). The ingress of ns-A is like myservice.mycompany.com. All clients are using myservice.mycompany.com to access old services in ns-A.

Now, I need to rollout the traffic from ns-A to ns-B. I need all clients to access the new service in ns-B. I can create a new Ingress for new service in ns-B: myservice-B.mycompany.com and update all service to use this new endpoint.

but I have many clients. it is possible to use other ways to do canaries rollout from ns-A to ns-B. I looked into contour, but contour cannot support two namespaces rollout.

is it possible to use DNS cutover or cluster-internal DNS names to canary rollout? Could you please give more details? Thanks