kind: Ingress
apiVersion: networking.k8s.io/v1
metadata:
  name: example.com
  namespace: testing

spec:
  rules:
    - http:
        paths:
          - path: /foo
            backend:
              service:
                name: service-foo
                port:
                  number: 8080
            pathType: Prefix

---
kind: Service
apiVersion: v1
metadata:
  name: service-foo
  namespace: testing

spec:
  ports:
    - name: http
      port: 8080
  type: ExternalName
  externalName: "2001:0db8:3c4d:0015:0000:0000:1a2f:2a3b"