
Currently, I am running OTRS 2.4 and 3.0 on the same box.
The concepts should apply, more or less, to virtual hosts.
Also, Postgresql is able to be used if you want to install from source.
stuff to add to the vhost directives. You may wish to use variables or
mod_macro http://www.cri.ensmp.fr/~coelho/mod_macro/
# --
# added for OTRS (http://otrs.org/)
# $Id: apache2-httpd-new.include.conf,v 1.5 2008/11/10 11:08:55 ub Exp $
# --
# agent, admin and customer frontend
ScriptAlias /otrs/ "/path/to/customer1/otrs/bin/cgi-bin/"
Alias /otrs-web/ "/path/to/customer1/otrs/var/httpd/htdocs/"
# if mod_perl is used
<IfModule mod_perl.c>
# load all otrs modules
Perlrequire /path/to/customer1/otrs/scripts/apache2-perl-startup.pl
# Apache::Reload - Reload Perl Modules when Changed on Disk
PerlModule Apache2::Reload
PerlInitHandler Apache2::Reload
PerlModule Apache2::RequestRec
# set mod_perl2 options