Re: [Xen-devel] [User Question] KVM and VirtualBox in Xen Dom0

["Fajar A. Nugraha" <list@xxxxxxxxx>]

On Thu, Sep 20, 2012 at 2:44 PM, Lukas Laukamp <lukas@xxxxxxxxxx> wrote:

> And would it be possible to
> implement something that KVM and VirtualBox work in a Xen Dom0?

> Is this a
> task for the Xen development or something for the Linux kernel,, KVM or
> VirtualBox?

Since it looks like you're a user and not a developer, I'd actually
suggest you rethink your requirements and find ways to implement it
using available solutions.

For example, you said you want to "create a VM Host for deploying VM
templates which are compatible to the most solutions". If the
templates are Linux, it's much easier to create one template that
suits all. Some things to watch out for:
- disk driver. Ubuntu loads most disk driver by default, but for other
distros (e.g. Centos) you might need to force drivers (xen front block
driver, virtio, etc) to be included in initrd by modifying
/etc/modprobe.conf or similar regardles which driver is currently
active
- disk naming. Use LABEL or UUID whenever possible
- filesystem for /boot. To be safe, use a separate /boot partition,
and use ext2/ext3, since some versions of pygrub do not support ext4.

If you follow that, you should be able to use the same image on
virtualbox, vmware, xen PV (with vfb enabled) or HVM. If you need more
help creating this template, xen-users will be a more appropriate
place to ask.

Another option, if your machine is dedicated for this purpose, is to
run native linux with kvm and virtualbox installed (you can have them
both installed, just not used at the same time), and install xen
inside a VM. That way you can still test everything except xen HVM.

-- 
Fajar

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