I am trying to route traffic to my application hosted in a Kubernetes cluster. At the present moment, I am using Ngroks free domains. For example happy-frog-dancing.ngrok-free.app.

I have set up this ingress-depl

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ngrok-ingress-depl
  namespace: theblock
  annotations:
    kubernetes.io/ingress.class: ngrok
spec:
  ingressClassName: ngrok
  rules:
    - host: dominant-hawk-factual.ngrok-free.app
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: app-service
                port:
                  number: 8000
    - host: server.dominant-hawk-factual.ngrok-free.app
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: server-service
                port:
                  number: 3000

And I get an invalid error

{"level":"info","ts":"2024-07-14T14:47:56Z","logger":"controllers.ingress","msg":"Ingress is not valid so skipping it","ingress":{"name":"ngrok-ingress-depl","namespace":"theblock"}}

But it works fine when I do something like this.

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ngrok-ingress-depl
  namespace: theblock
  annotations:
    kubernetes.io/ingress.class: ngrok
spec:
  ingressClassName: ngrok
  rules:
    - host: dominant-hawk-factual.ngrok-free.app
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: app-service
                port:
                  number: 8000
    # - host: dominant-hawk-factual.ngrok-free.app
    #   http:
    #     paths:
          - path: /server
            pathType: Prefix
            backend:
              service:
                name: server-service
                port:
                  number: 3000

What are best practices when trying to do something like this?

I have tried creating selectors in the Ngrok Dashboard but I am not familiar or well versed in how these systems work.