Re: [Xen-users] how can you boot an existing linux domU off the cdrom on sles11 dom0?

["Nick Couchman" <Nick.Couchman@xxxxxxxxx>]

> 
> Nick, 
> 
> Thanks for the response. Always appreciate your help. 
> 
> I don't think the first part will work because I need the scsi pci card
> attached for the domU when it boots. So doing it as a new installation
> won't work, unless I can somehow add that PCI device. 

Ah, I see.

> 
> The second part might work if I add the init=/bin/bash and also add
> pci=['0e:04.0','0e:04.1'] to the config. Then xm create it. So it would
> be:
> 
> xm delete domU
> modify config file for extra parameter and pci line
> xm create domU
> hopefully get to a bash prompt and have enough info to do what is needed
> xm destroy domU
> xm delete domU
> modify config again and remove "extra" parameter
> xm create domU
> 
> That cover it?

Yes, that should cover it.

> 
> Side note question. How come Citrix XenServer can do this so easily? I
> tested XenServer a couple months again, and through their XenCenter
> management package it was as easy as selecting a cd iso for the cdrom
> device, and the domU would boot. Now that I think about it, maybe that
> was only an Windows HVM domU. Maybe a linux PV would have the same
> issue...
> 

I wouldn't be surprised if XenServer makes this easier for PV domUs - 
vm-install makes it relatively easy, but, for whatever reason, virt-manager 
doesn't really make it easy to tell an existing domU to boot from CD.  The code 
is there to make it happen, just not in the correct place.

-Nick



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