My objetive is to see logs from pods belonging to other namespaces, in order to diagnose problems.

Here are the permissions I’ve configured:

apiVersion: v1
kind: ServiceAccount
metadata:
  name: default
  namespace: jenkins
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: listar-recursos
rules:
  - apiGroups: [""]
    resources: ["pods", "pods/log"]
    verbs: ["get", "list", "watch"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: asgina-lista-recursos
  namespace: jenkins
subjects:
  - kind: ServiceAccount
    name: default
    namespace: jenkins
roleRef:
  kind: ClusterRole
  name: listar-recursos
  apiGroup: rbac.authorization.k8s.io

Here is the result after running:

kubectl logs -l name=myapp -n anothernamespace

Error from server (Forbidden): pods is forbidden: User "system:serviceaccount:jenkins:default" cannot list resource "pods" in API group "" in the namespace "anothernamespace"