Typical nginx configuration

gistfile1.sh

worker_processes  2;  # Usually number of processors

error_log  logs/error.log;

events {
    worker_connections  2024;
}


http {
    passenger_root /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5;
    passenger_ruby /usr/local/bin/ruby;
    passenger_max_pool_size 5;     # Optional, should be configured in context of your environment


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

    client_max_body_size 100m;

    sendfile        on;

    tcp_nopush on;

    gzip on;
    gzip_min_length  1100;
    gzip_comp_level 8;                    # compression level 1..9
    gzip_http_version 1.0;
    gzip_proxied any;
    gzip_types       text/plain text/css application/x-javascript text/xml application/xml application/xml+rss text/javascript;
    gzip_buffers 16 8k;
    gzip_disable "MSIE [1-6]\.";          # IE6 fix

    keepalive_timeout  500;               # depends on your need

    server {                              # This is optional, use this if you have   
                                          # config.action_controller.asset_host = "cdn%d.#{SITE_DOMAIN}"
      listen 80;

      expires max;

      add_header Cache-Control public;
      add_header Vary Accept-Encoding;

      server_name cdn0.domain.com cdn1.domain.com cdn2.domain.com cdn3.domain.com;

      root /opt/applications/app_name/current/public;
    }

    server {
        listen 80;
        server_name domain.com *.domain.com;

        if ($host = 'domain.com') {                         # If you preffer www instead of plain domain
    	  rewrite  ^/(.*)$  http://www.domain.com/$1  permanent;
        }

        root /opt/applications/app_name/current/public;
        access_log /opt/applications/app_name/current/log/access.log;
        error_log /opt/applications/app_name/current/log/error.log;

        ssi on;

        proxy_read_timeout 500;
	
    	if ($host ~* "^([^www][a-zA-Z]+)\.domain\.com$") {         # redirect to special path for subdomains
	        rewrite ^/$ /messages/users/ last;
    	}	

        location / {
          default_type text/html;
 	  proxy_set_header X-Real-IP $remote_addr;                 # Ip behind proxy

          if (-f $request_filename) { 
              expires max;
              break;
          }   
	  
         if ($request_method = POST) {
            passenger_enabled on;
            break;
          }

          # Supports for maintenance.html 
    	  try_files /maintenance.html $uri $uri/index.html $uri.html @modrails; 

        }

        location @large_upload {
     	  passenger_enabled on;
        }

        location /data/public_files {
          root /opt/applications/site_name/current/public;
        }

        location @modrails {
          passenger_enabled on;
        }

        error_page 500 502 503 504 /50x.html;

        location = /50x.html {
          root html;
        }
    }   

}