How can I rewrite some publicly resolvable foo.example.com to an in-cluster service?

kubectl run curl \
--stdin --tty --rm \
--image=radial/busyboxplus:curl

nslookup foo.example.com

As expected, it’s unable to resolve|curl:

Server:    10.152.183.10
Address 1: 10.152.183.10 kube-dns.kube-system.svc.cluster.local

nslookup: can't resolve 'foo.example.com'

curl http://foo.example.com:8080/healthy

curl: (6) Couldn't resolve host 'foo.example.com'

Exit the curl pod so that the DNS may be refreshed.

If the cluster uses [CoreDNS]:

kubectl get deployment \
--selector=k8s-app=kube-dns \
--namespace=kube-system \
--output=name

deployment.apps/coredns

Let’s create an in-cluster service to act as the target: