TIS1601 - Specified Namespace Not Found or Inaccessible

The specified namespace is either not found or is inaccessible, which prevents proper configuration and routing.

Recommendation: Ensure Namespace Exists and Is Accessible

To prevent routing errors and configuration issues, update the namespace references to point to an existing and accessible namespace. Verify the namespace's availability if required.

Examples

1. VirtualService Referring to a Non-Existent Namespace

   apiVersion: networking.istio.io/v1beta1
   kind: VirtualService
   metadata:
     name: my-virtual-service
     namespace: example-namespace
   spec:
     hosts:
     - "my-app.example.com"
     http:
     - route:
       - destination:
           host: "my-app-service.non-existent-namespace.svc.cluster.local"

   Explanation: The VirtualService is attempting to route traffic to my-app-service in non-existent-namespace, but this namespace does not exist or is inaccessible. As a result, Istio cannot properly route traffic to the intended destination.

Recommendation

Select the correct namespace to point to and ensure that the namespace exists and is accessible.

1. Update the Namespace to a Valid Namespace

   Update the namespace reference to point to an existing and accessible namespace.

   apiVersion: networking.istio.io/v1beta1
   kind: VirtualService
   metadata:
     name: my-virtual-service
     namespace: example-namespace
   spec:
     hosts:
     - "my-app.example.com"
     http:
     - route:
       - destination:
           host: "my-app-service.example-namespace.svc.cluster.local"

   Explanation: By updating the destination to reference example-namespace, which exists in the cluster, Istio can properly resolve and route traffic to the intended workload.

2. Verify Namespace Accessibility

   Ensure the specified namespace is available in the cluster. You can create the missing namespace if needed.

   kubectl create namespace example-namespace

   Explanation: Creating the missing namespace ensures that any configuration referring to that namespace can be applied successfully, and Istio can route traffic without encountering errors.