[libvirt] fully virtualized xen guest question

[Christoph Höger]

Am Freitag, den 01.08.2008, 10:23 +0100 schrieb Daniel P. Berrange:
> On Thu, Jul 31, 2008 at 11:31:39PM +0200, Christoph H?ger wrote:
> > I am running XEN on an debian etch. For clustering purposes I wanted to
> > boot fedora as virtual machine. 
> > 
> > That works (except for nfs mounts) fine using the paravortualization
> > features.
> > 
> > But fully virtulalized guests do not even boot, I do not get any
> > sensefull error message, my config file looks like:
> > 
> > <domain type='xen'>
> > <name>werewolf</name>
> > 
> > <os>
> >         <type>hvm</type>
> >         <loader>/usr/lib/xen-3.0.3-1/boot/hvmloader</loader>
> > 
> > <kernel>/data/virtual/kernel/kvm1/vmlinuz-2.6.18-6-amd64</kernel>
> > 
> > <initrd>/data/virtual/kernel/kvm1/initrd.img-2.6.18-6-amd64</initrd>
> >         <cmdline>root=/dev/hda1</cmdline>
> 
> Booting fullyvirtualized guests off a kernel+initrd is a very new
> feature in Xen. Your <loader> path suggests you are using Xen 3.0.3
> which is no where near new enough to support this. You need to boot
> of CDROM or hardisk instead.
> 
> > <domain type='xen'>
> > <name>werewolf</name>
> > 
> > <os>
> >         <type>hvm</type>
> >         <loader>/usr/lib/xen-3.0.3-1/boot/hvmloader</loader>
> > 
> > <kernel>/data/virtual/kernel/kvm1/vmlinuz-2.6.18-6-amd64</kernel>
> > 
> > <initrd>/data/virtual/kernel/kvm1/initrd.img-2.6.18-6-amd64</initrd>
> >         <cmdline>root=/dev/hda1</cmdline>
> > </os>
> >   <memory>524M</memory>
> >   <vcpu>1</vcpu>
> >   <devices>
> >         <emulator>/usr/bin/kvm</emulator>
> 
> Urm, you're trying to use KVM with Xen which just won't work. You
> need to point to Xen's version of QEMU /usr/lib/xen/bin/qemu-dm
> or whereever Debian puts it.
> 
> > all I get when tryin virsh create is:
> > 
> > xend_post: error from xen daemon: (xend.err "Error creating domain: (0,
> > 'Error')")
> 
> This looks like a fairly old Xen which didn't know how to give proper
> error messages. You'll have to check /var/log/xen/ for more details,
> but it'll certainly be the kernel/initrd stuff that's broken, and the
> device emulator too.
> 
> Daniel

Hmm,

that's bad. Is there a way to run a kernel > 2.6.18 as DomU under an
2.6.18 Dom0 paravirtualized? 
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