GKE uses spanner (with an etcd API layer) per the docs. https://docs.cloud.google.com/kubernetes-engine/docs/concepts/cluster-architecture#cluster-state-databa

GKE uses spanner (with an etcd API layer) per the docs. https://docs.cloud.google.com/kubernetes-engine/docs/concepts/cluster-architecture#cluster-state-database https://docs.cloud.google.com/kubernetes-engine/docs/concept... https://cloud.google.com/blog/products/containers-kubernetes/gke-65k-nodes-and-counting https://cloud.google.com/blog/products/containers-kubernetes...