When using mod_proxy to load balance between members of a mongrel or thin cluster it’s important not to pass requests through for static content. A basic virtual site can be configured like this:
<VirtualHost *:80> ServerName myapp.mydomain.com DocumentRoot /opt/myapp/public <Proxy balancer://thinservers> BalancerMember http://127.0.0.1:3000 BalancerMember http://127.0.0.1:3001 BalancerMember http://127.0.0.1:3002 </Proxy> ProxyPreserveHost On ProxyPass /images ! ProxyPass /stylesheets ! ProxyPass /javascripts ! ProxyPass / balancer://thinservers/ ProxyPassReverse / balancer://thinservers/ <Proxy *> Order deny,allow Allow from all </Proxy> ErrorLog /var/log/apache2/error.log LogLevel warn CustomLog /var/log/apache2/access.log combined </VirtualHost>