nstraint specifying that
the services must have one of the listed <code>app</code> labels.</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>apiVersion: &#34;rbac.istio.io/v1alpha1&#34;
kind: ServiceRole
metadata:
  name: service-viewer
  namespace: default
spec:
  rules:
  - services: [&#34;*&#34;]
    methods: [&#34;GET&#34;]
    constraints:
    - key: &#34;destination.labels[app]&#34;
      values: [&#34;productpage&#34;, &#34;details&#34;, &#34;reviews&#34;, &#34;ratings&#34;]
</c