Access service on subdomain in Kubernetes

Solution 1:

Here is the answer to all these people that see it after 5 years since the question got asked.

Tech got better and now we have ingress in k8s :D.

To make use of subdomains, deploy ingress controller e.g. nginx ingress controller

and create an ingress object:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress
spec:
  rules:
  - host: "simple-nginx.domain.com"
    http:
      paths:
      - pathType: Prefix
        path: "/"
        backend:
          service:
            name: simple-nginx
            port:
              number: 80

Now all that is left to do, is to create a dns record for *.domain.com and point it to the ingress IP seen in ADDRESS column.

$ kubectl get ingress
NAME          CLASS    HOSTS                      ADDRESS           PORTS   AGE
ingress       <none>   simple-nginx.domain.com    xxx.yyy.zzz.kkk   80      2d20h