content/en/docs/reference/config/analysis/ist0129/index.md
This message occurs when caCertificates is not set in a destination rule, but is
needed for the traffic policy.
You will receive this message:
{{< text plain >}} 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 {{< /text >}}
when your cluster has the following destination rule:
{{< text yaml >}} apiVersion: networking.istio.io/v1 kind: DestinationRule metadata: name: db-tls spec: host: mydbserver.prod.svc.cluster.local trafficPolicy: portLevelSettings: - port: number: 443 tls: mode: SIMPLE clientCertificate: /etc/certs/myclientcert.pem privateKey: /etc/certs/client_private_key.pem sni: my-nginx.mesh-external.svc.cluster.local # caCertificates not set {{< /text >}}
In this example, the destination rule db-tls specifies
TLS, but does not set the CA certificate file.