h2 id=example>Example</h2><p>You will receive this message:</p><pre><code class=language-plain data-expandlinks=true data-repo=istio>Error [IST0129] (DestinationRule db-tls.default) DestinationRule default/db-tls in namespace default has TLS mode set to SIMPLE but no caCertificates are set to validate server identity for host: mydbserver.prod.svc.cluster.local at port number:443</code></pre><p>when your cluster has the following destination rule:</p><pre><code class=language-yaml data-expandlinks=true data-