There are many instances of `extensions/v1beta1` `Ingress` in this repository, e.g.: https://github.com/kubernetes/ingress-gce/blob/051cfde145f34c8721e39df778e262fb4a256c67/LIMITATIONS.md#latency Per https://endoflife.date/google-kubernetes-engine, it appears that 1.21 will expire at the end of the year. That will be the last version of GKE that supported `extensions/v1beta1` `Ingress` which was deprecated in 1.14 -- https://kubernetes.io/docs/reference/using-api/deprecation-guide/#ingress-v122