This script creates an admin.kubeconfig file to use with kubectl to interact and administer the kubernetes cluster.

The directory is changed to the directory where the cryptographic material was created, and any existing admin.kubeconfig file is deleted.

The script then populates the admin.kubeconfig file with information from the environment variables and from the GCE environment.

A final test is then run to use the new admin.kubeconfig file to verify that it is working as expected. Output similar to the below should be observed:

NAME                 STATUS    MESSAGE              ERROR
scheduler            Healthy   ok                   
controller-manager   Healthy   ok                   
etcd-0               Healthy   {"health": "true"}   
etcd-1               Healthy   {"health": "true"}

NAME       STATUS    ROLES     AGE       VERSION
worker-0   Ready     <none>    27m       v1.10.3
worker-1   Ready     <none>    26m       v1.10.3