CentOS how to specify subdomain from another server?

Question

linux

Good time of the day!
You need to add a subdomain that will actually be located on another server.
i.e .:
site.com // ip1
sub.site.com // ip2

VirtualHost *:80
ServerName sub.site.com
ServerAlias ​​site.com
DocumentRoot ip2
/VirtualHost

Next do

sudo apachectl restart

But it says to me that the relative path is wrong. What is the right and easiest way to do what I want?
I am not well versed in Linux, but I urgently need to solve a problem on CentOS. Tell.

Answer 1

in the domain control panel