all

Currently I'm setting the RBAC in the following way:

kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: read-pods
subjects:
  - kind: User
    name: system:serviceaccount:default:default
roleRef:
  kind: Role
  name: pod-reader
  apiGroup: rbac.authorization.k8s.io

However I want to include the namespace value for User, I just changed above code into this

kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: read-pods
subjects:
  - kind: User
    name: system:serviceaccount:$(namespace):default
roleRef:
  kind: Role
  name: pod-reader
  apiGroup: rbac.authorization.k8s.io

and I create the resource in this way kubectl apply -f k8s -n akka

Forbidden to communicate with Kubernetes API server; check RBAC settings. Response: [{"kind":"Status","apiVersion":"v1","metadata":{},"status":"Failure","message":"pods is forbidden: User \"system:serviceaccount:akka:default\" cannot list resource \"pods\" in API group \"\" in the namespace \"akka\"","reason":"Forbidden","details":{"kind":"pods"},"code":403}

Seems NOT WORKING, so my question is is there anyway to insert the namespace value for the field? Thanks in advance...