Good day, I can´t find more information from this. We can create a multiple OpenVZ containers in ISPConfig? And multiple ISPConfig installations in containers?
The classic OpenVZ kernel, which was supported by ISPConfig OpenVZ module, is not under development anymore. So you can not run any current Linux distribution with it, e.g. the last debian version which worked with classic OpenVZ Kernel was 8 or 9 when I remember correctly. So trying to use it in ISPConfig is not useful anymore today.