hc7 webserver and haproxy

hi, we use to build our webserver and dbserver with a redundant failover  solution based on haproxy and san storage. we'd like to know if it is possible to build it also for the webservers running with hc ( 7 or 8). would licenses have issues because of the two different ip's? of course, if it needs two same license for the same www role  is not this the problem.