ServiceAccount cannot list resource "pods" in namespace though it has role with appropriate resources

Question

I have the following definitions in my custom namespace:

apiVersion: v1
kind: ServiceAccount
metadata:
  name: test-sa
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: test
rules:
  - apiGroups: [""]
    resources: ["pods", "pods/exec"]
    verbs: ["get", "list", "delete", "patch", "create"]
  - apiGroups: ["extensions", "apps"]
    resources: ["deployments", "deployments/scale"]
    verbs: ["get", "list", "delete", "patch", "create"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: test
subjects:
  - kind: User
    name: test-sa
    apiGroup: rbac.authorization.k8s.io
roleRef:
  kind: Role
  name: test
  apiGroup: rbac.authorization.k8s.io

Running describe role test

Name:         test
Labels:       <none>
Annotations:  kubectl.kubernetes.io/last-applied-configuration:
                {"apiVersion":"rbac.authorization.k8s.io/v1","kind":"Role","metadata":{"annotations":{},"name":"test","namespace":"test-namesapce...
PolicyRule:
  Resources                     Non-Resource URLs  Resource Names  Verbs
  ---------                     -----------------  --------------  -----
  pods/exec                     []                 []              [get list delete patch create]
  pods                          []                 []              [get list delete patch create]
  deployments.apps/scale        []                 []              [get list delete patch create]
  deployments.apps              []                 []              [get list delete patch create]
  deployments.extensions/scale  []                 []              [get list delete patch create]
  deployments.extensions        []                 []              [get list delete patch create]

When I'm trying to run the command kubectl get pods in a pod that is using this service account, I'm getting the following error:

Error from server (Forbidden): pods is forbidden: User "system:serviceaccount:test-namespace:test-sa" cannot list resource "pods" in API group "" in the namespace "test-namespace"

Where is that misconfigured?

Answer 1

The problem was with the subjects of RoleBinding. The correct definition would be:

apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: test
subjects:
  - kind: ServiceAccount
    name: test-sa
roleRef:
  kind: Role
  name: test
  apiGroup: rbac.authorization.k8s.io