Pod trying to curl a service : "Could not resolve host"

Hey, I’ve tried getting information about DNS discovery. I thought maybe I need to configure this, but by the docs, it seems this is supposed to be built-in.

In my pod, I tried to curl against the load balancer I created for him. When I curl against the cluster IP & Internal IP of the service - it’s working. but when I try to use the service name (eg: curl http://ranks-service:80/rank) I get the error: “curl: (6) Could not resolve host: ranks-service” I checked /etc/hosts:

127.0.0.1 localhost ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet fe00::0 ip6-mcastprefix fe00::1 ip6-allnodes fe00::2 ip6-allrouters 10.244.0.76 ranks-864cf4c995-gk5g5

I would really appreciate having some help with this, Thanks!