Ingress changes with networking.k8s.io/v1 GA in 1.19

[Bret Fisher]

I'm dealing with this in my own fork, so some of that work may be portable upstream.

BretFisher/kubernetes-mastery#14

Old spec example

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: cheddar
spec:
  rules:
  - host: cheddar.A.B.C.D.nip.io
    http:
      paths:
      - path: /
        backend:
          serviceName: cheddar
          servicePort: 80

New spec example

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: cheddar
spec:
  rules:
  - host: cheddar.A.B.C.D.nip.io
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: cheddar
            port:
              number: 80