参考：https://kubernetes.github.io/ingress-nginx/user-guide/basic-usage/

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress-myservicea
  annotations:
    # use the shared ingress-nginx
    kubernetes.io/ingress.class: "nginx"
spec:
  rules:
  - host: myservicea.foo.org
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: myservicea
            port:
              number: 80
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress-myserviceb
  annotations:
    # use the shared ingress-nginx
    kubernetes.io/ingress.class: "nginx"
spec:
  rules:
  - host: myserviceb.foo.org
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: myserviceb
            port:
              number: 80