example of a load balancer config via nginx's upstream module

nginx.conf

events {
    worker_connections 1024;
}

http {

   include /etc/nginx/mime.types;
   default_type application/octet-stream;

   sendfile on;
   keepalive_timeout 65;


   upstream stageEnd {
#       server stage.library.unlv.edu;
       server www-b.library.unlv.edu weight=4;
   }

   server {
       listen       80;
       return 301 https://$host$request_uri;
       server_name  stagefront.library.unlv.edu;

       location / {
            proxy_pass http://stageEnd;
            proxy_http_version 1.1;
            proxy_set_header Host stagefront.library.unlv.edu;

       }
   }

   server {
      listen    443;

      ssl on;
      ssl_certificate   /etc/nginx/ssl/stagefront.crt;
      ssl_certificate_key       /etc/nginx/ssl/stagefront.key;

      server_name       stagefront.library.unlv.edu;
      access_log        /var/log/nginx/ssl.access.log;
      error_log         /var/log/nginx/ssl.error.log;

      location / {
            proxy_pass http://stageEnd;
            proxy_http_version 1.1;
            proxy_set_header Host stagefront.library.unlv.edu;

       }
   }


}

jfox added some proxy cache stuff...