ost network this assumption is violated,
and this can lead to routing failures at the host level.</p></li><li><p>Check the webhook&rsquo;s <code>namespaceSelector</code> to determine whether the
webhook is scoped to opt-in or opt-out for the target namespace.</p><p>The <code>namespaceSelector</code> for opt-in will look like the following:</p><pre><code class=language-bash data-expandlinks=true data-outputis=yaml data-repo=istio>$ kubectl get mutatingwebhookconfiguration istio-sidecar-injector -o yaml | gre