# vim /usr/local/apache2/conf/httpd.conf
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
LoadModule proxy_http_module modules/mod_proxy_http.so
ProxyRequests Off
<Proxy balancer://clusterphpinfo>
BalancerMember http://10.0.2.203:80 loadfactor=1
BalancerMember http://10.0.2.204:80 loadfactor=1
</Proxy>
ProxyPass / balancer://clusterphpinfo