Tutorial fails @ Step 5 due to RBAC issues if you have capital letters in your gcloud account name

[CrimsonZen]

In the guide at https://github.com/GoogleCloudPlatform/agones/blob/master/install/README.md#setting-up-a-google-kubernetes-engine-gke-cluster, I ran this line to set up RBAC stuff:

kubectl create clusterrolebinding cluster-admin-binding \
  --clusterrole cluster-admin --user `gcloud config get-value account`

Then, I moved onto the kubectl apply step, which failed. Output included this:

...
validatingwebhookconfiguration "agones-validation-webhook" configured
mutatingwebhookconfiguration "agones-mutation-webhook" configured
secret "agones-manual-cert" unchanged
Error from server (Forbidden): error when creating "https://github.com/GoogleCloudPlatform/agones/raw/release-0.2.0/install/yaml/install.yaml": clusterroles.rbac.authorization.k8s.io "agones-controller" is forbidden: attempt to grant extra privileges:
...

Turns out, the gcloud config get-value account substitution in Step 4 will return a lowercase version of your current user, which causes the subsequent kubectl apply step to fail if your "actual username" has uppercase letters in it. (My username is CrimsonZen@, but the substitution offered crimsonzen@.)

This thread helped me diagnose the problem: prometheus-operator/prometheus-operator#357

I'm very much a kubernetes newbie, but I figured I'd call this out as being a potential hazard during setup if you follow the tutorial.

[markmandel]

Oh that's interesting! Good find!

I bet this means there issues across lots of projects that use this step!