Port name seems not supported with CombinedRoutes

[seb-inf]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

Service:

apiVersion: v1
kind: Service
metadata:
  name: demo-test
  namespace: demo-test
spec:
  clusterIP: 10.23.1.120
  clusterIPs:
  - 10.23.1.120
  internalTrafficPolicy: Cluster
  ipFamilies:
  - IPv4
  ipFamilyPolicy: SingleStack
  ports:
  - name: http
    port: 8080
    protocol: TCP
    targetPort: http

Ingress

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  annotations:
    konghq.com/regex-priority: "110"
    konghq.com/strip-path: "false"
    kubernetes.io/ingress.class: kong
  creationTimestamp: "2022-11-25T15:03:20Z"
  generation: 4
  name: demo-test-backend
  namespace: demo-test
  resourceVersion: "77594872"
  uid: 20d6eee3-6ef1-4796-b325-929068620b6f
spec:
  rules:
  - host: demo.test.company.com
    http:
      paths:
      - backend:
          service:
            name: demo-test
            port:
              name: http
        path: /~/(api|docs)
        pathType: ImplementationSpecific
status:
  loadBalancer:
    ingress:
    - ip: 10.23.14.50

Kong configuration:

router_flavor = traditional

Current behavior: 503

{"message": "failure to get a peer from the ring-balancer"}

In logs:

kong-kong-6d6b957cff-kp2j9 ingress-controller time="2022-12-21T10:48:52Z" level=error msg="resource processing failed: can't find port for backend kubernetes service: no suitable port found" GVK="networking.k8s.io/v1, Kind=Ingress" name=demo-test-backend namespace=demo-test                                                         │
kong-kong-6d6b957cff-kp2j9 ingress-controller time="2022-12-21T10:48:52Z" level=info msg="no targets found to create upstream" service_name=demo-test.demo-test-backend.demo-test.0                                                                                                                                         │
kong-kong-6d6b957cff-kp2j9 ingress-controller time="2022-12-21T10:49:01Z" level=error msg="resource processing failed: can't find port for backend kubernetes service: no suitable port found" GVK="networking.k8s.io/v1, Kind=Ingress" name=demo-test-backend namespace=demo-test                                                         │
kong-kong-6d6b957cff-kp2j9 ingress-controller time="2022-12-21T10:49:01Z" level=info msg="no targets found to create upstream" service_name=demo-test.demo-test-backend.demo-test.0

Expected Behavior

The requests should be routed to BE.

Steps To Reproduce

1. Create Ingress and Service as above
2. Deploy Kong 3.1 and KIC 2.8
3. Make request to ingress

Kong Ingress Controller version

2.8

Kubernetes version

v1.22.15-gke.100

Anything else?

No response

[riipeckx]

Reproduced this while deploying ArgoCD Operator. It uses named port by default which then creates events like below when applying :

Events:
  Type     Reason                              Age                 From         Message
  ----     ------                              ----                ----         -------
  Warning  KongConfigurationTranslationFailed  18m (x17 over 19m)  kong-client  can't find port for backend kubernetes service: no suitable port found

I downgrade to 2.7.0 for now.

[pmalek]

@seb-inf @riipeckx You can also try disabling CombinedRoutes feature flag as indicated in this comment.

The fix for this has already been merged in #3313 and will be provided with next release we cut.

[riipeckx]

Thanks for the answer @pmalek, I'll just wait for the next release then.

Thanks again.

[seb-inf]

Thank you @pmalek @mflendrich