user  deploy;
worker_processes  1;
error_log   logs/error.log debug;
 
events {
  worker_connections  1024;
}
 
http {
  include        conf/mime.types;
  default_type   application/octet-stream;
  sendfile        on;
  #tcp_nopush     on;
  keepalive_timeout  65;
  tcp_nodelay        on;
 
  gzip  on;
  gzip_min_length  1100;
  gzip_buffers     4 8k;
  gzip_types       text/plain;
 
  upstream mongrel {
    server 127.0.0.1:8000;
    server 127.0.0.1:8001;
  }
 
  server {
    listen       80;
    server_name  example.com;
    root         /var/www/apps/example/current/public;
    index        index.html index.htm;
 
    try_files  $uri/index.html $uri.html $uri @mongrel;
 
    location @mongrel {
      proxy_set_header  X-Real-IP        $remote_addr;
      proxy_set_header  X-Forwarded-For  $proxy_add_x_forwarded_for;
      proxy_set_header  Host             $http_host;
      proxy_redirect    off;
      proxy_pass        http://mongrel;
    }
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
      root   html;
    }
  }
}

upstream beast { ... }
proxy_pass http://beast;