Role Binding
RoleBinding references a role, but does not contain it. It can reference a Role in the same namespace or a ClusterRole in the global namespace. It adds who information via Subjects and namespace information by which namespace it exists in. RoleBindings in a given namespace only have effect in that namespace. Deprecated in v1.17 in favor of rbac.authorization.k8s.io/v1 RoleBinding, and will no longer be served in v1.20.