For Keystone to work, the shell.php must always be accessible using the same path. To enforce this, either use Apache's Alias directive or use a symbolic link.

Consider we have Web server which runs www.domain and you want Keystone to run on virtual host tkl.domain. The relevant Apache 1.3.X config will look like this:

# If you want to use name-based virtual hosts you need to define at
# least one IP address (and port number) for them.
#
NameVirtualHost 1.2.3.4

# Our primary domain
<virtualHost 1.2.3.4>
  ServerName www.domain
</VirtualHost>

# Our Keystone domain
<virtualHost 1.2.3.4>
  ServerAdmin tklmanager@domain
  DocumentRoot /home/tkl/html
  ServerName tkl.domain
  ServerAlias tkl
  ErrorLog /home/tkl/logs/error.log
  CustomLog /home/tkl/logs/access.log common
  Alias /tklite/ /var/www/tklite/
</VirtualHost>