About "apiGroup: rbac.authorization.k8s.io" in role binding

[davidshen84]

Hi,

In this document, it has this example.

subjects:
- kind: User
  name: "alice@example.com"
  apiGroup: rbac.authorization.k8s.io

I could not find any description about the apiGroup property. I also see people use an empty string, "", for the value. What is its relationship with the apiGroups property in a role object?

Thank

[Maxim_Kondratyev]

+1 I would like to know the answer as well.