NonResourceURLs

 apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: cluster-read-only-role 
rules:
- apiGroups: ["*"]
  resources: ["*"]
  verbs: ["get","watch","list"]
- nonResourceURLs:
  - /metrics
  verbs:
  - get

See also

• Kubernetes roles, kubectl get [ roles | clusterroles | clusterrolebindings ], kubectl create rolebinding, K8s Cluster roles
• Kubernetes RBAC kubectl auth, kubectl auth can-i, kubectl auth reconcile kubectl create [ role | clusterrole | clusterrolebinding | rolebinding | serviceaccount ], groups:, Kubernetes RBAC good practices, kube2iam, K8s Cluster roles, rbac.authorization.k8s.io, system:

https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB1182188