Re: [libvirt] RE: [Qemu-devel] [ANNOUNCE] virt-mem tools version 0.2.8 released

Daniel P. Berrange
2008-08-07T10:47:39Z

On Thu, Aug 07, 2008 at 07:40:58PM +0900, Jun Koi wrote:
> On Thu, Aug 7, 2008 at 7:20 PM, Alexey Eremenko
> <alexey.eremenko@qumranet.com> wrote:
> >
> > This seems to be great !
> > I think it is similar to OpenVZ concept of controlling VMs from Host, right
> > ?
> >
> > How it works, if it is not installed in guest ?
>
> Basically he does that by inspecting the VM's memory. Something like
> the "instrospection" mechanism.

Yes they peek at the live guest kernel memory image to extract the data.

> One of the problem is that these tools work via libvirt, so on a VM is
> not managed by libvirt, these tools no longer work.

That's not a problem - that's a reason to use libvirt :-) It allows the
same tools to work whether using Xen, QEMU, KVM or any other full machine
virtualization suported by libvirt, rather than being tied to one particular
hypervisor. Not to mention ability to run them remotely, with authentication
and encryption, etc

Daniel
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