<code>VirtualService</code> definition.
For example, add a simple route rule for &ldquo;reviews:v1&rdquo;:</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: reviews
spec:
  hosts:
  - reviews
  http:
  - route:
    - destination:
        host: reviews
        subset: v1
</code></pre><h2 id=cross-namespace-configuration>Control configuration sharing across namespaces</h2><p>You can define virtual services, d