Hey guys, Yesterday I did an interesting server configuration. Actually we had a rails app hosted on server which is using passenger(a.k.a mod_rails). This application can be access by going to http://domain.com . Also we had a wordpress running which could be access by going to http://blog.domain.com.

But, for SEO sake I had to change configuration so that wordpress can be access by http://domain.com/blog instead of http://blog.domain.com/

The problem was if I configure wordpress for http://domain.com/blog and go to this url, the request was handled by rails app because of domain.com virtualhost.

So what I did? I changed apache virtualhost configuration for http://blog.domain.com and http://domain.com as:

<virtualHost *>
    ServerName blog.domain.com

    DocumentRoot /var/www/html/wordpress/
    <directory "/var/www/html/wordpress/">
      Options FollowSymLinks
      AllowOverride None
      Order allow,deny
      Allow from all
   </directory>
 </virtualHost>

<virtualHost *>
    ServerName domain.com
    ServerAlias www.domain.com
    DocumentRoot /var/www/html/domain/current/public
    <directory "/var/www/html/domain/current">
      Options FollowSymLinks
      AllowOverride None
      Order allow,deny
      Allow from all
    </directory>

  RailsAllowModRewrite  on
  RewriteRule ^/blog/?(.*)$ http://blog.domain.com/$1 [P,NC,L]

 </virtualHost>

Also I created a symbolic link to wordpress installation directory under rails public folder(ln -s /var/www/html/wordpress /var/www/html/railsapp/public/blog).

Now remember to change your wordpress address and blog address options to http://domain.com/blog under settings tab of wp-admin section.(Thanks Amit for pointing this out)

I restarted apache and it worked fine. Wordpress was running at http://domain.com/blog and rails app was as http://domain.com/.

Update: If you want to change your wordpress permalink structure in account of SEO please change “AllowOverride None” to “AllowOverride All” as shown in image below.