rbac.yaml

apiVersion: v1
kind: Namespace
metadata:
  name: ns-pruner
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: ns-pruner-sa
  namespace: ns-pruner
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: ns-pruner-role
rules:
  - apiGroups: [""]
    resources: ["namespaces"]
    verbs: ["get", "list", "delete"]
  - apiGroups: [""]
    resources: ["pods", "services"]
    verbs: ["get", "list"]
  - apiGroups: ["apps"]
    resources: ["deployments"]
    verbs: ["get", "list"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: ns-pruner-rolebinding
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: ns-pruner-role
subjects:
  - kind: ServiceAccount
    name: ns-pruner-sa
    namespace: ns-pruner