Working on fixing https://github.com/kubernetes/kubernetes/issues/43716.
This will create the necessary certificates.
On GCE is will upload those certificates to Metadata.
They are then pulled down on to the kube-apiserver.
They are written to the /etc/src/kubernetes/pki directory.
Finally they are loaded vi the appropriate command line flags.
The requestheader-client-ca-file can be seen by running the following:-
kubectl get ConfigMap extension-apiserver-authentication
--namespace=kube-system -o yaml
Minor bug fixes.
Made sure AGGR_MASTER_NAME is set up in all configs.
Clean up variable names.
Added additional requestheader configuration parameters.