# I recently switched one of my Rails applications from Litespeed to Apache+Passenger
# with nginx on the frontend to handle static file requests. nginx proxies all non-static
# file requests to Apache+Passenger. I use page caching extensively, so that is why I 
# need fast static file serving. 
#
# I ran some quick tests comparing static file serving of Litespeed, Apache, and nginx. 
# Here are the results:
#
# nginx 4400 requests/second
# Apache 2900 requests/second
# Litespeed 5000 requests/second
# (run with ab -n 100000 -c 20 http://www.mydomain.com/staticfile.html)

# While nginx serves static files nearly as fast as Litespeed, nginx spikes the CPU to 
# about 50%. Litespeed hovers around 5%.
#
# So here is the configuration and built options that I am now using for nginx + Apache+Passenger
#
# BEGIN nginx configuration
# Built with ./configure --with-http_ssl_module
worker_processes  1;

events {
  worker_connections  1024;
}

http {
  include       mime.types;
  default_type  application/octet-stream;
  sendfile        on;
  #tcp_nopush     on;

  #keepalive_timeout  0;
  keepalive_timeout  65;

  #gzip  on;

  server { #http
    listen 80;
    server_name www.YOURDOMAIN.com YOURDOMAIN.com;

    # redirect domain.com requests to www.domain.com
    if ($host !~* www\.(.*)) {
      rewrite ^(.*)$ http://www.$host$1 permanent;
    }

    root /var/www/apps/YOURAPP/current/public;
    location / {
      proxy_set_header X-Real-IP  $remote_addr;
      proxy_set_header Host $host;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

      if (!-f $request_filename) {
          proxy_pass http://localhost:8080;
          break;
      }
      if ($request_method != GET) {
          proxy_pass http://localhost:8080;
          break;
      }
    }
  }


  server { #https
    listen       443;
    server_name www.YOURDOMAIN.com YOURDOMAIN.com;

    if ($host !~* www\.(.*)) {
      rewrite ^(.*)$ https://www.$host$1 permanent;
    }

    ssl                  on;
    ssl_certificate      www.YOURDOMAIN.com.crt;
    ssl_certificate_key  www.YOURDOMAIN.com.key;

    ssl_session_timeout  5m;

    ssl_protocols  SSLv2 SSLv3 TLSv1;
    ssl_ciphers  ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
    ssl_prefer_server_ciphers   on;

    root /var/www/apps/YOURAPP/current/public;

    location / {
      proxy_set_header X-Real-IP  $remote_addr;
      proxy_set_header Host $host;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header X-FORWARDED_PROTO https;

      if (!-f $request_filename) {
        proxy_pass http://localhost:8080;
        break;
      }
      if ($request_method != GET) {
        proxy_pass http://localhost:8080;
        break;
      }
    }
  }
}
# END nginx configuration


# BEGIN Apache 2.2 configuration
# Built with ./configure --enable-ssl --enable-rewrite --enable-proxy --enable-proxy-http --with-mpm=worker

User daemon
Group daemon

ServerRoot "/usr/local/apache2"
ServerAdmin webmaster@yourdomain.com
DocumentRoot "/usr/local/apache2/htdocs"

<Directory />
  Options FollowSymLinks
  AllowOverride None
  Order deny,allow
  Deny from all
</Directory>

<IfModule dir_module>
  DirectoryIndex index.html
</IfModule>


<FilesMatch "^\.ht">
  Order allow,deny
  Deny from all
  Satisfy All
</FilesMatch>

ErrorLog "logs/error_log"
LogLevel warn

<IfModule log_config_module>
    LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
    LogFormat "%h %l %u %t \"%r\" %>s %b" common

    <IfModule logio_module>
      # You need to enable mod_logio.c to use %I and %O
      LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedio
    </IfModule>
    CustomLog "logs/access_log" common
</IfModule>

DefaultType text/plain

<IfModule mime_module>
  TypesConfig conf/mime.types

  AddType application/x-compress .Z
  AddType application/x-gzip .gz .tgz
</IfModule>

<IfModule ssl_module>
  SSLRandomSeed startup builtin
  SSLRandomSeed connect builtin
</IfModule>


Listen 127.0.0.1:8080
NameVirtualHost 127.0.0.1:8080
RewriteEngine On
#RewriteLog "/usr/local/apache2/logs/rewrite.log"
#RewriteLogLevel 10

LoadModule passenger_module /usr/local/lib/ruby/gems/1.8/gems/passenger-2.0.6/ext/apache2/mod_passenger.so
PassengerRoot /usr/local/lib/ruby/gems/1.8/gems/passenger-2.0.6
PassengerRuby /usr/local/bin/ruby

<VirtualHost 127.0.0.1:8080>
    ServerAdmin webmaster@YOURDOMAIN.com
    DocumentRoot "/var/www/apps/YOURAPP/current/public"
    ServerName YOURDOMAIN.com
    ServerAlias www.YOURDOMAIN.com
    ErrorLog "logs/YOURDOMAIN.com-error_log"
    CustomLog "logs/YOURDOMAIN.com-access_log" common

    <Directory "/var/www/apps/YOURAPP/current/public">
       Options FollowSymLinks
       AllowOverride None
       Order allow,deny
       Allow from all
    </Directory>
</VirtualHost>
# END Apache configuration