kubectl apply ingress: Unknown field error-CodePudding

I have ingress as:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: mongoexpress-ingress
spec:
  rules:
  - host: mylocalmongoexpress.com
    http:
      paths:
      - backend:
          serviceName: mongoexpress-service
          servicePort: 8081

When I run 'kubectl apply -f mongoexpress-ingress.yaml', I get error:

error: error validating "mongoexpress-ingress.yaml": error validating data: [ValidationError(Ingress.spec.rules[0].http.paths[0].backend): unknown field "serviceName" in io.k8s.api.networking.v1.IngressBackend, ValidationError(Ingress.spec.rules[0].http.paths[0].backend): unknown field "servicePort" in io.k8s.api.networking.v1.IngressBackend, ValidationError(Ingress.spec.rules[0].http.paths[0]): missing required field "pathType" in io.k8s.api.networking.v1.HTTPIngressPath]; if you choose to ignore these errors, turn validation off with --validate=false

Going through online resources, I couldn't find issue in yaml file.

So what am I missing here?

CodePudding user response：

Ingress specification has changed from v1beta1 to v1. Try:

...
spec:
  rules:
  - host: mylocalmongoexpress.com
     http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: mongoexpress-service
            port:
              number: 8081

CodePudding user response：

As an addition to other answers, you can always use kubectl explain in such situations, if you try to do this: kubectl explain ingress.spec.rules.http.paths.backend.service --api-version=networking.k8s.io/v1 then you'll get:

FIELDS:
   name <string> -required-
     Name is the referenced service. The service must exist in the same
     namespace as the Ingress object.

   port <Object>
     Port of the referenced service. A port name or port number is required for
     a IngressServiceBackend.

This way you can easily find what fields are available for which resource in which API version.

CodePudding user response：

You seems to mix Ingress versions. You declared networking.k8s.io/v1, but your block of YAML corresponds to networking.k8s.io/v1beta1 - which is no longer available as of 1.22.

v1beta1

- backend:
    serviceName: mongoexpress-service
    servicePort: 8081

- backend:
    service:
      name: mongoexpress-service
      port:
        number: 8081