Re: [Xen-users] how to upgrade a linux guest OS under Xen

[mslemko <mslemko@xxxxxxxxxxxx>]

Mark Williamson wrote:
> > I'm having trouble upgrading a guest OS, and want to know what steps I
> > should take to do that.
> >
> > specifically I'm trying to upgrade a trixbox 2.3.x install to 2.4 (both
> > are CentOS 5).
> >
> > this is my situation:
> > - I'm using XenSource 3.0. I've burned a trixbox install CD and have it
> > in the CD drive (/dev/hda).
> > - I have the same ISO mounted on another machine and served as a http
> > source for the installation (just in case that is easier).
> > - I've selected the /dev/hda to be passed on to the guest, but it seems
> > that it doesn't boot the guest OS with the CD.
> >     
> Is it a paravirt guest?  Paravirt guests can't boot off CD-ROMs.  If it's an 
> HVM guest, you need to make sure the CD drive is enabled as the first boot 
> device (for Open Source Xen you usually put boot="d" in the config file, d is 
> the drive letter representing the CD-ROM)
>   
it is a paravirt guest... so upgrading via CD looks bleak.
> > - I can mount /dev/hda (the CD) in the guest.
> >
> > Is there something I need to set to allow the guest to boot off that CD,
> > or is there another way to upgrade.
> >     
> Especially if you're using a PV guest, it may be worth investigating whether 
> it's possible to just upgrade using yum, rather than the upgrade CD.
> Cheers,
> Mark
>
>   
I will give "yum upgrade" a try - here's hoping!

Thanks for the information esp. on pv guests - that will save me a bunch 
of time looking for a non-existent solution.
-Mark

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