An hosting provider needs to centralize all site’s configurations (Apache virtualhost) on database to automatize site and creation from a Web panel (a way could be to parse apache configs and reload the process, but u need sudo or a suid process to do this), and there is not a native apache virtualhost module based on LDAP or SQL backends.
We started using mod_vhost_ldap without success because it lacks of flexibility… moreover mod_vhost_ldap doesn’t support Alias and Redirect parameters.
Working with mod_vhost_ldap we discovered that apacheSuexecUID and apacheSuexecGID expects numeric IDs, in our environment UID/GID changes between servers and between user bases.
Mod_vhost_ldap_ng is born to better integrate LDAP and functionalities from mod_alias and mod_suexec.