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Re: [Xen-users] running a hypervisor inside a domU guest?

To: David Grundy <dagrundy@xxxxxxxxx>
Subject: Re: [Xen-users] running a hypervisor inside a domU guest?
From: Alexander Schreiber <als@xxxxxxxxxxxxxxx>
Date: Sat, 9 Oct 2010 16:35:08 +0200
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On Fri, Oct 01, 2010 at 04:58:45PM -0700, David Grundy wrote:
> Hello All:
> I am not sure if the question I am asking makes sense but I am trying to set
> up a testbed for provisioning customized vms and the only machines that I
> have root access to are vms.  What I am wondering... is there any way to
> have a domU running as a dom0 so that any vm creating and destroy can be
> done inside of a vm.  I tried to naively install xen and xen-libs with yum
> and my vm came back up after a reboot, but I can't seem to get xend running
> on it.  I have tried to search for examples of this but have come up empty.
> Is this even possible?

What can be done is running Xen PVM inside Xen HVM. For that, you set up
a domain with Xen HVM, running a suitable Linux distro. Then, inside
that HVM domain, you can install Xen and create PVM domains. I tested
that for fun & giggles with IIRC Xen 3.1 and it does work. Be warned,
however, that the PVM domains will probably be very slow.

Kind regards,
"Opportunity is missed by most people because it is dressed in overalls and
 looks like work."                                      -- Thomas A. Edison

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