GKECluster kubeconfig relies on deprecated basic auth

[vfarcic]

Creating kubeconfig from the GKECluster does not work without masterAuth set. It creates kubeconfig without a user. However, when masterAuth is defined, creation of a GKE cluster fails with newer versions of Kubernetes since the basic authentication is removed in GKE cluster versions >= 1.19. The process of generating kubeconfig should be solved in a different way.

What happened?

Created a GKE cluster with spec.forProvider.masterAuth.username. The output of kubectl describe is as follows.

  Warning  CannotCreateExternalResource  58s (x19 over 14m)  managed/gkecluster.container.gcp.crossplane.io  cannot create GKE cluster: googleapi: Error 400: Basic authentication was removed for GKE cluster versions >= 1.19. The cluster cannot be created with basic authentication enabled. Instructions for choosing an alternative authentication method can be found at: https://cloud.google.com/kubernetes-engine/docs/how-to/api-server-authentication., badRequest

How can we reproduce it?

Create a GKECluster resource with spec.forProvider.masterAuth.username and spec.forProvider.initialClusterVersion set to latest or any k8s version equal to or higher then 1.19.

What environment did it happen in?

Crossplane version:

kubectl crossplane --version

v1.0.0

Kubernetes version: latest available in GKECluster.