To set up a ProxyPass in Apache is generally pretty straightforward.
To proxy requests on serverA for / to port 8080 on serverB, you need a simple proxy like the example below:
ProxyPass / http://serverb.example.com:8080/
ProxyPassReverse / serverb.example.com:8080/
An example VirtualHost config is below:
<VirtualHost *:80>
ServerName servera.example.com
ProxyRequests Off
ProxyPreserveHost On
<Proxy *>
Order deny,allow
Allow from all
</Proxy>
ProxyPass / http://serverb.example.com:8080/
ProxyPassReverse / http://serverb.example.com:8080/
<Location />
Order allow,deny
Allow from all
</Location>
</VirtualHost>
