NFS over VPN

Hi, recently at the place where i work a collegue came up with an idea to use nfs over vpn to sync our webservers. i have not done much work with either, and i have two questions about it. first, is this a practical solution? and second, im a bit stumped about resources on the subject (i do have nfs documentation, but not much of vpn resources, and nothing on how to combine the two). sorry is this question might seem trivial/stupid, any help/opinion is greatly appreciated : )