upstream csdn-tomcat{
  server 192.168.100.101:8080;
  server 192.168.100.102:8080;
}
server {
 listen 80;
 server_name www.csdn.net csdn.net;
 index index.html;
 location / {
  if ( $request_uri = "/" ) {
    rewrite "/" http://www.csdn.net/index.html break;
  }
  proxy_pass http://csdn-tomcat$request_uri;
 }
 # 301 redirect:
 location /blog/index.html {
  return 301 http://www.iteye.com$request_uri;
 }
}