code> is not a security boundary. Istiod will continue to have access to all namespaces even when you have configured your <code>discoverySelectors</code>.</p><h2 id=discovery-selectors-in-action>Discovery Selectors in Action</h2><p>Assuming you know which namespaces to include as part of the service mesh, as a mesh administrator, you can configure <code>discoverySelectors</code> at installation time or post-installation by adding your desired discovery selectors to Istio’s MeshConfig resource. For exampl