Re: [Xen-users] Live Migration Config

[Anthony Liguori <aliguori@xxxxxxxxxx>]

Mark Williamson wrote:

> > I am a professional C/Unix coder. Can I help provide this functionality? It
> > seems fairly trivial.
> >    
> Something using SSL certificates would probably do what you want.  There are 
> probably other ways to do this stuff, too.  Patches to provide this 
> functionality would be very welcome, although I guess we'd prefer them to be 
> against Xen 3.0.
>  
Python doesn't have a native SSL server socket :-(  We'll have to write 
our own OpenSSL python bindings most likely.
SSL is also sort of overkill and will have non-neglible overhead.  You 
really just want integrity verification.  The only concern then is 
having the domain's memory being readable over the network.  That's not 
acceptable for certain workloads (anything containing private data) but 
acceptable for the majority (for instance, a static webserver without 
any sort of password database).
You certainly need the option of encrypting the migration traffic though 
for those workloads where privacy matters.
Authentication is the trickier part of this all.  Especially since there 
will be a strong desire to tie into larger-scale authentication 
infrastructures.
Proxying everything over an SSH connection is probably the best long 
term solution.  However, I've not been able to figure out how to disable 
privacy in ssh :-/
Have I mentioned this is a hard problem? ;-)

Regards,

Anthony Liguori

> HTH,
> Mark
>
>  
>
> > On 10/27/05, Mark Williamson <mark.williamson@xxxxxxxxxxxx> wrote:
> >    
> >
> > > > How does one configure the live migration facility? Is there a
> > > > configuration file to allow a foreign dom0 to migrate a domU to the
> > > >        
> > > local
> > >
> > >      
> > >
> > > > dom0? Or can any dom0 migrate a domU to any other dom0?
> > > >        
> > > It's pretty much free for all as far as dom0s are concerned ;-) Basically
> > > if
> > > one dom0 can reach another over a network, it can migrate stuff there!
> > > Right
> > > now, it's more or less expected that an organisation's dom0s are isolated
> > > on
> > > a vlan (or separate ethernet).
> > >
> > > Cheers,
> > > Mark
> > >      
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>  

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