"Virtualising" the rest of the Internet before moving the virtual machine to the physical machine?

[Philip Rhoades]

People,

I am building an upgraded server by using a new physical hard disk 
(/dev/sdb and leaving the current drive [/dev/sda] untouched) and using 
qemu-kvm to virtualise the server using the virtual version of the whole 
hard disk (/dev/vda).  This allows me to do most of the upgrade from 
Fedora 14-64 to Fedora 16-64 in the virtual mode before rebooting on the 
new disk and going live with the new server.  This is very convenient 
and will save a lot of down time for the server but there are some 
limitations.  I host a number of different domains and their web sites 
and there are Ruby on Rails upgrade issues to sort out going from F14 o 
F16 but in the virtual mode I can't check if the Apache VirtualHosts are 
working or not - so I was wondering if there is some way - maybe using a 
dodgy virtual DNS setup or something - that will allow the virtual 
machine to "see" the rest of the "virtual" Internet so I can test
browse 
to each of the different domains' web sites and sort out problems 
instead of having to do it after taking the new hard disk live.

I am probably not explaining this very well - do people see what I am 
getting at?

Thanks,

Phil.
-- 
Philip Rhoades

GPO Box 3411
Sydney NSW	2001
Australia
E-mail:  phil(a)pricom.com.au