Web Server Load Balancing

mod_proxy

We can easily distribute different duties to backend servers by configuring a mod_proxy front end. Consider the following:

Request For Maps To

/cgi-bin/ http://cgiserver.example.com/cgi-bin/

/images/ http://imageserver.example.com/images/

/apps/ http://appserver.example.com/apps/

Configure Apache with the following:

ProxyPass /cgi-bin/ http://cgiserver.example.com/cgi-bin/
ProxyPassReverse  /cgi-bin/ http://cgiserver.example.com/cgi-bin/
ProxyPass /images/ http://imageserver.example.com/images/
ProxyPassReverse  /images/ http://imageserver.example.com/images/
ProxyPass /apps/ http://appserver.example.com/apps/
ProxyPassReverse  /apps/ http://appserver.example.com/apps/

Slide 9 of 27

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