nginx conf exmaple

upstream manager {
  # fail_timeout=0 means we always retry an upstream even if it failed
  # to return a good HTTP response (in case the Unicorn master nukes a
  # single worker for timing out).

  server unix:/opt/x.com/manager/current/tmp/sockets/unicorn.sock fail_timeout=0;
}

server {
  listen 80;
  server_name www.x.com.com _ default;
  keepalive_timeout 5;
  error_log /var/log/nginx/manager.log debug;
  root /opt/x.com/wordpress/current;

  set_real_ip_from xxx.xxx.xxx.xxx;

  location = /favicon.ico { access_log off; log_not_found off; }

  location /rails {
    internal;
    root /opt/x.com/manager/current/public;

    # Remove the '/rails' part from the url the look in here.
    rewrite ^/rails(.*)$ $1 break;

    # Only expose ipan data to the ipan, not anyone else
    location ~ /ipan_data$ {
      allow xxx.xxx.xxx.xxx;
      deny all;
    }

    # Don't let hits to public/migrate actually be served 'externally'
    location = /rails/migrate.html {
      internal; 
    }

    try_files $uri /migrate.html @rails;
  }

  # Static files from the rails app.
  if (-f /opt/x.com/manager/current/public$uri ) {
    rewrite ^ /rails$uri last;
  }

  # Urls starting with these are served from the rails app.
  location /users { rewrite ^ /rails$uri last; }
  location /products { rewrite ^ /rails$uri last; }
  location /sales { rewrite ^ /rails$uri last; }
  location /login { rewrite ^ /rails$uri last; }
  location /logout { rewrite ^ /rails$uri last; }

  # Else try wordpress (including it's static files)
  index index.php;
  try_files $uri /wordpress$uri$is_args$args;

  location @rails {
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;
    proxy_redirect off;

    proxy_pass http://manager;
  }

  location ~^(/wordpress)(/.*)$ {
    set $path $2;
    internal;

    root /opt/x.com/wordpress/shared/wordpress/;
    # This is for static files. The $1 is becaus 'the "alias" directive must
    # use captures inside location given by regular expression'
    #alias /opt/x.com/wordpress/shared/$1/;

    try_files $path $path/ /wordpress/index.php?q=$path&$args;

    location ~ (\.php)$ {
      # And this is so php doesn't see the wordpress dir
      rewrite ^/wordpress(.*)$ $1 break;
      root /opt/x.com/wordpress/shared/wordpress/;

      include /etc/nginx/fastcgi_params;

      fastcgi_index index.php;
      fastcgi_pass unix:/tmp/php-fastcgi.sock;
      fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    }
  }

}