Trying nginx on kubernetes to access services running at different ports.

Intially when all the services deployed and nginx deployed at the last then i see everything working fine.

If any of the services updated/restarted , nginx unable to access that particular service.

server {
    location / {
        proxy_pass http://backends.example.com:8080;
    }
}

and will be able to access the service only if I restart the nginx through

nginx -s reload 

Anyway to make nginx detect/poll to reflect the services restarts (Service Discovery with DNS)