Re: [Xen-users] XenU installs

["Daniel P. Berrange" <berrange@xxxxxxxxxx>]

On Tue, Jun 05, 2007 at 10:22:46PM +0100, Nico Kadel-Garcia wrote:
> Daniel P. Berrange wrote:
> >On Tue, Jun 05, 2007 at 06:38:34PM +0100, Mark Williamson wrote:
> >  
> >>It'd be kinda nice if there were a standardised spec for "how to boot an 
> >>ISO in a paravirt VM".  This would require some kind of agreement between 
> >>the distributors to do things in a uniform way, but it would move us 
> >>closer to a "just works" type setup - surely a good thing.  It seems 
> >>relatively unfortunate for the install procedure for each paravirt guest 
> >>to be slightly different so that the user or tools has to understand 
> >>those differences.
> >>    
> >
> >Paravirt-ops may (eventually) help here because removing the need for a
> >small xen kernel. Our goal in Fedora is to continue working to make 
> >paravirt
> >boot & install process be more closely aligned to fullyvirt & baremetal. 
> >This is why we do Fedora guest installs by booting anaconda (+ optional
> >kickstart) instead of chroot installs, and why we default to using pygrub
> >and keeping kernels inside the guest image, etc. All the tools already
> >expect things to work in this way with bare metal & fullvirt, so having
> >paravirt be different is just complicating things. PXE boot of paravirt
> >is another thing we'd like to have too...
> >  
> Is there any chance of integrating support for doing virt-manager 
> installs on top of an *existing* domain, making sure it's shut down, 
> then allowing the network boot to do upgrade or rescue procedures on it?

I've never really thought about that. In theory it could be doable, not
sure how hairy an actual implementation would get though. A better approach
may be just allowing more flexiblity in reconfiguring existing guest
hardware in the UI. eg, allowing you to add a CDROM device to an existing
guest & then changing the default BIOS boot device. We're sort of half
way towards being able todo the latter at the moment.

Dan.
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