HAProxy isn't designed to serve thousands of different virtual hosts. If you have a handful of different domains, that's fine, you can use some ACLs on the HTTP

HAProxy isn't designed to serve thousands of different virtual hosts. If you have a handful of different domains, that's fine, you can use some ACLs on the HTTP "Host:" header to differentiate them; if you have thousands of apps, and need an easy way to reconfigure dynamically, Hipache is more appropriate.