nginx.conf

http {
   upstream avinash {
      server 123.123.123.123; 
      server 124.1.124.125;
   }

   # This server accepts all traffic to port 80 and passes it to the upstream. 
   # Notice that the upstream name and the proxy_pass need to match.

   server {
      listen 80; 

      location / {
          proxy_pass http://avinash;
      }
   }
}