Using nodePort service with ingress, I success expose the service to the out world.

--- service
NAMESPACE       NAME            TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)   
default         kubernetes      ClusterIP   10.96.0.1        <none>        443/TCP
default         postgres        ClusterIP   10.106.182.170   <none>        5432/TCP
default         user-api        NodePort    10.99.12.136     <none>        3000:32099/TCP
ingress-nginx   ingress-nginx   NodePort    10.110.104.0     <none>        80:31691/TCP,443:30593/TCP
--- ingress
NAME          HOSTS                ADDRESS        PORTS   AGE
app-ingress   example.com          10.110.104.0   80      3h27m

The rule of ingress show below.

  Host                Path  Backends
  ----                ----  --------
  example.com
                      /user-api   user-api:3000 (172.16.117.201:3000)

If my user-api have a restful api /v1/health interface, how to access this api inside and outside server?