Is it a good idea to virtualise your Server 2008 AD with Kvm?

I am in the process of setting up a Server 2008 R2 AD \ DC and someone suggested i use a linux based OS with KVM to virtualise the entire system. In my humble opinion, why would i want to virtualise payware with opensource software. Is this even a good idea? I also want to deploy an Exchange server in the newly created domain. Any advice would be appreciated.

The reason i want to run a virtualised os FROM my Server 2008 r2 machin e, is i want to run a CentOs firewall.
The-It-ProAsked:
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PatricckCommented:
Depends on how much users you got, and what roles are running on your win server.
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The-It-ProAuthor Commented:
60 users, AD, DHCP,DNS, Exchange 2010.
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martfunksCommented:
Hi dude,
i don't see the reason to do this.
If you have an 2008 R2 Windows server and you want to have it in a virtual enviroment,
1. set up Windows Server R2 to your physical machine,
2. set up Hyper-V role,
3. create a virtual machine,
4. install again Windows 2008 R2,
5. set up AD DS

For all this you must have ONE licence for Windows 2008 R2, NOT two.

For this scenario you have the oportunity to create as many as you want virtual machines.
1. Exchange
2. Additional Domain Controller
3. etc, etc

Now if you want to have more secure virtual layer to run your virtual machines, instead to install Windows 2008 R2, install Windows 2008 R2 Core Edition. (Not GUI, more secure, Hyper-V Role).
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martfunksCommented:
i don't see the reason to virtualise a software with another software, ¿nce you can do with the same.
It is more homogenized enviroment.

Now the CentOS Firewall you can run it from a new virtual machine with linux OS.
You can create as many as you want virtual machines, carefull RAM, CPU, Storage.

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