Annotation

kubernetes.io/ingress.global-static-ip-name: fortio-prod-ip

doesn't work, maybe because our ingress doesn't run as a NodePort

https://cloud.google.com/kubernetes-engine/docs/tutorials/configuring-domain-name-static-ip#step_2b_using_an_ingress

in general we should find a way to keep the ingress IP in sync with the DNS entry for the domain