TIS0302 - No Workload Matches Gateway Selector in Namespace

No workload matches the Gateway selector in this namespace.

Recommendation: Ensure Gateway Selector Matches an Existing Workload

To ensure your Gateway functions correctly, verify that the selector matches a workload in the namespace, such as an ingress gateway deployment. Deploy missing workloads or adjust the selector to prevent configuration issues.

Examples

1. Gateway with Non-Matching Selector

   apiVersion: networking.istio.io/v1beta1
   kind: Gateway
   metadata:
     name: unmatched-gateway
     namespace: example-namespace
   spec:
     selector:
       istio: non-existent-ingressgateway
     servers:
     - port:
         number: 80
         name: http
         protocol: HTTP
       hosts:
       - "example.com"

   Explanation: The Gateway resource is configured with a selector istio: non-existent-ingressgateway, but no workload in the namespace matches this label. This means that no proxy is available to serve traffic for the gateway, rendering it ineffective.

Recommendation

Deploy the missing workload or adjust the selector to target a correct location.

1. Deploy the Missing Workload

   Deploy the appropriate workload, such as an Istio ingress gateway, with the correct labels.

   apiVersion: apps/v1
   kind: Deployment
   metadata:
     name: my-ingressgateway
     namespace: example-namespace
     labels:
       istio: non-existent-ingressgateway
   spec:
     replicas: 1
     selector:
       matchLabels:
         istio: non-existent-ingressgateway
     template:
       metadata:
         labels:
           istio: non-existent-ingressgateway
       spec:
         containers:
         - name: istio-proxy
           image: istio/proxyv2

2. Adjust Gateway Selector to Match Existing Workload

   Update the Gateway selector to match an existing ingress gateway workload.

   apiVersion: networking.istio.io/v1beta1
   kind: Gateway
   metadata:
     name: corrected-gateway
     namespace: example-namespace
   spec:
     selector:
       istio: ingressgateway
     servers:
     - port:
         number: 80
         name: http
         protocol: HTTP
       hosts:
       - "example.com"