flannel/Documentation/kube-flannel-rbac.yml

# Create the clusterrole:
# $ kubectl create -f kube-flannel-rbac.yml
# Bind the flannel serviceaccount to the flannel clusterrole:
# $ kubectl create clusterrolebinding flannel --clusterrole=flannel --serviceaccount=kube-system:flannel
# Create the pod using the same namespace used by the flannel serviceaccount:
# $ kubectl create --namespace kube-system -f kube-flannel.yml
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: flannel
rules:
  - apiGroups:
      - ""
    resources:
      - pods
    verbs:
      - get
  - apiGroups:
      - ""
    resources:
      - nodes
    verbs:
      - list
      - update
      - watch