every day more ispconfig3 surprised I was unaware that you could create virtual machines with Ispconfig3 OpenVz I found this tutorial. https://www.howtoforge.com/installing-openvz-plus-management-of-vms-through-ispconfig-3-debian-6.0 is it compatible with nginx? Debian wheezy?
You can not run a openvz server on a webserver as the linux filesystem quota will not work when you install the openvz kernel. So you would loose the ability to limit the webspace that a website can use when you install the openvz kernel. Therefor the openvz setup has to be on a separate node and not on the web server.