e>frontend</code> and <code>backend</code> namespaces. You would like to allow all your services
in the <code>frontend</code> namespace to access all services that are marked <code>external</code> in the <code>backend</code> namespace.</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>apiVersion: &#34;rbac.istio.io/v1alpha1&#34;
kind: ServiceRole
metadata:
  name: external-api-caller
  namespace: backend
spec:
  rules:
  - services: [&#34;*&#34;]
    methods: [&#34;*”]
    constraint