[libvirt] Problem with fullyvirtualized guest direct kernel boot

[Max Martynov]

On Wed, Nov 5, 2008 at 9:34 PM, Daniel P. Berrange <berrange at redhat.com> wrote:
>
> On Wed, Nov 05, 2008 at 09:28:16PM +0300, Max Martynov wrote:
> > Hi All,
> >
> > I am trying to use fullyvirtualized guest direct kernel boot, but all I see
> > is the following error:
> > libvir: Xen Daemon error : POST operation failed: (xend.err 'Error creating
> > domain: (2, \'Invalid kernel\', "elf_xen_note_check: ERROR: Not a Xen-ELF
> > image: No ELF notes or \'__xen_guest\' section found.\\n")')
> >
> > Kernel, initrd and root file system are extracted from working Fedora 9 disk
> > image without any additional tinkering. Guest Fedora is clean and was
> > installed from scratch. When I use this whole disk image with
> > fullyvirtualized guest BIOS boot with, everything works fine. I also tried
> > paravirtualized guest bootloader with another linux kernel and it also works
> > fine. Xen version is 3.2.1-rc1-pre. Host OS is Ubuntu Hardy.
>
> That Xen is too probably old - you need 3.3.x or newer. The Xen 3.2 in
> Fedora has a backport of this functionality, and I doubt the Ubuntu xen
> has copied that.

Thanks, I will try to do that. However, the sample for
fullyvirtualized guest direct kernel boot uses Fedora.
>
>
> > Here is the libvirt config for direct kernel boot:
> > <domain type='xen' id='18'>
> >     <name>test1</name>
> >     <uuid>4dea22b31d52d8f32516782e98ab3fa0</uuid>
> >     <os>
> >         <type>linux</type>
>
> This tag is telling Xen todo a paravirt guest, but you say you want
> a fullvirt one, so replace this with
>
>        <type>hvm</type>
Yes, this was just a typo, because I tried several variants. It was
hvm when I tested it.
>
> >         <loader>/usr/lib/xen/boot/hvmloader</loader>
> >         <kernel>/tmp/vmlinuz-2.6.25-14.fc9.i686</kernel>
> >         <initrd>/tmp/initrd-2.6.25-14.fc9.i686.img</initrd>
> >         <root>/dev/sda1</root>
> >         <cmdline>ro</cmdline>
> >     </os>
> >     <memory>524288</memory>
> >     <vcpu>1</vcpu>
> >     <devices>
> >         <emulator>/usr/lib/xen/bin/qemu-dm</emulator>
> >         <disk type='file'>
> >             <driver name="tap" type="aio"/>
> >             <source file='/tmp/f9_disassembled/root.img'/>
> >             <target dev='sda1'/>
> >         </disk>
> >         <disk type='file'>
> >             <driver name="tap" type="aio"/>
> >             <source file='/tmp/swap'/>
> >             <target dev='sda3'/>
> >         </disk>
> >         <interface type='bridge'>
> >             <source bridge='eth0'/>
> >             <mac address='00:16:3e:5d:c7:9e'/>
> >             <script path='/etc/xen/scripts/vif-bridge'/>
> >         </interface>
> >         <graphics type='vnc' port='5904'/>
> >     </devices>
> > </domain>
> >
> >
>
> Daniel
> --
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