Google Container Engine StatefulSets in kubernetes 1.5.1 don't seem to work

Question

I have been waiting to use the StatefulSet functionality from GCE for a while. Their docs claim that it's now available in 1.5.1 but it doesn't seem to work at all.

From what I can tell the apps/v1alpha1 api still exists but PetSet is no longer there but the apps/v1beta1 that houses StatefulSet is not enabled.

The docs say that it is, but it's not.

PetSet's name has changed to StatefulSet in version 1.5. StatefulSet is a beta feature available in regular Container Engine clusters, and PetSet is no longer available in Alpha Clusters.

https://cloud.google.com/container-engine/docs/alpha-clusters

and here's the error I get when I try to use a StatefulSet in apps/v1beta1 as per the kubernetes docs. (it also fails using apps/v1alpha1 as does a PetSet in apps/v1alpha1)

API version "apps/v1beta1" isn't supported, only supports API versions ["apps/v1alpha1" "componentconfig/v1alpha1" "v1" "authentication.k8s.io/v1beta1" "authorization.k8s.io/v1beta1" "autoscaling/v1" "batch/v1" "batch/v2alpha1" "certificates.k8s.io/v1alpha1" "extensions/v1beta1" "policy/v1alpha1" "federation/v1beta1" "storage.k8s.io/v1beta1" "rbac.authorization.k8s.io/v1alpha1"]; if you choose to ignore these errors, turn validation off with --validate=false

Am I reading this correctly as they never enabled the StatefulSet functionality for kubernetes 1.5.1?

Answer 1

Very likely you have mismatching versions of Kubernetes running on the client and the server. I discovered something similar, due to a quirk of the gcloud kubectl-installation, namely it, despite updating, still running on 1.4.x. Run kubectl version and update the binary for your platform manually.

You need 1.5+ on both ends.