gistfile1.txt

upstream robust {
      ip_hash;
      server 127.0.0.1:8002;
      server 127.0.0.1:8004;
  }

server {
      listen 80;
      server_name login.grid.com;
      location / {
          proxy_redirect off;
          proxy_set_header Host $host;
          proxy_set_header X-Real-IP $remote_addr;
          proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
          proxy_set_header X-NginX-Proxy true;
          proxy_pass http://robust;
      }
  }