1.5. Enabling Knative Serving and Knative Eventing metrics when using Service Mesh with mTLS

Procedure

1. Specify prometheus as the metrics.backend-destination in the observability spec of the Knative Serving custom resource (CR):

   apiVersion: operator.knative.dev/v1beta1
   kind: KnativeServing
   metadata:
     name: knative-serving
     namespace: knative-serving
   spec:
     config:
       observability:
         metrics.backend-destination: "prometheus"
   ...

   This step prevents metrics from being disabled by default.

   注意

   When you configure ServiceMeshControlPlane with manageNetworkPolicy: false, you must use the annotation on KnativeEventing to ensure proper event delivery.

   The same mechanism is used for Knative Eventing. To enable metrics for Knative Eventing, you need to specify prometheus as the metrics.backend-destination in the observability spec of the Knative Eventing custom resource (CR) as follows:

   apiVersion: operator.knative.dev/v1beta1
   kind: KnativeEventing
   metadata:
     name: knative-eventing
     namespace: knative-eventing
   spec:
     config:
       observability:
         metrics.backend-destination: "prometheus"
   ...

2. Modify and reapply the default Service Mesh control plane in the istio-system namespace, so that it includes the following spec:

   ...
   spec:
     proxy:
       networking:
         trafficControl:
           inbound:
             excludedPorts:
             - 8444
   ...