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Re: [libvirt] [PATCH 0/7] Introduce API for dumping domain IP addresses



On Fri, Jun 08, 2012 at 11:13:53AM +0200, Michal Privoznik wrote:
> On 08.06.2012 11:02, Alex Jia wrote:
> > On 06/08/2012 04:04 PM, Michal Privoznik wrote:
> >> This feature has been requested for a very long time. However,
> > I'm very glad to see this patch :-)
> >> we had to wait for guest agent to obtain reliable results as
> > Yeah, it's a good way to get guest IP by GA, the disadvantage is we have
> > to depend on
> > GA installation the guest, sometimes, it probably is a trouble thing,
> > for example, I use
> > virt-v2v to convert a existing ESX VM into libvirt then the ESX VM
> > impossible had GA
> > installation ago, if I want to automate to finish all of stuff, but I
> > don't know VM IP address,
> > so I can't automatically install GA in the converted VM, it may be a
> > special case for you.
> > 
> > However, 'tcpdump' or 'nmap' can do the same thing without GA
> > installation in the guest,
> > maybe, we may have optional solution for how to get guest IP, of course,
> > it's just my idea.
> 
> I do agree. But a guest can be evil and send spoofed packets, or just
> run another guest inside which makes it hard to recognize which guest an

Can't the guest agent lie about the machine's interfaces too?
Cheers,
 -- Guido

> IP belongs to. But I think this can be implemented anyway - but must
> make sure users know abut certain unreliability of such method.
> 
> Michal
> 
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