Xen users - Dec 2012 - Problems with p2v / HVM not booting

Hi,

I need to do some p2v migration of a very old SuSE server.
Unfortunately, the kernel of that machine doesn''t support running as
xen
domU, so I need to put the machine into a HVM domU.

Using help from this list, I managed to access the individual HVM guest
disk''s partitions from the dom0 using kpartx. What I did:

* create a LV /dev/vg_guest/worker1_disk
* create two partisions on top of /dev/vg_guest/worker1_disk, using
  fdisk, setting the bootable flag on the first partition
* using kpartx to access the individual partitions, I ran mkfs.ext3 on
  the first partition and mkswap on the second partition.
* I rsync''ed the contents of the physical server''s filesystem
to the
  first partition

When I now try to boot the HVM machine, I can connect via VNC, however
the system doesn''t boot properly: On the VNC screen, I can see
"Booting
from hard disk ...", and nothing happens. "xm top" on the dom0
shows
100% CPU and 34% RAM usage for the domU. I''m somewhat at a loss here
...

Any help is greatly appreciated =)

Cheers, Andreas.


PS: When I "plug in" a Ubuntu live CDROM into the domU''s
config, I can
boot the system. However I noticed that the two partitions show up as
/dev/xvda[12], even though I specified "hda" in the domU''s
config:

   kernel = "/usr/lib/xen-4.0/boot/hvmloader"
   builder=''hvm''
   vcpus=3
   memory = 8192
   shadow_memory = 8
   name        = ''hvmtest''
   vif = [''type=ioemu,bridge=xenbr0'']
   acpi = 1
   apic = 1
   disk        = [ ''phy:/dev/vg_guest/worker1_disk,hda,w'',

''file:/home/hilboll/ubuntu-12.04.1-server-amd64.iso,ioemu:hdc:cdrom,r'',
]
   device_model = ''/usr/lib64/xen/bin/qemu-dm''
   boot="c"  # boot on floppy (a), hard disk (c) or CD-ROM (d)
   sdl=0
   vnc=1
   vncdisplay=1
   vfb = [''type=vnc'']

Hi Andreas,

did you install bootloader during domU system installation?

Jan

On 12/28/2012 01:00 PM, Andreas Hilboll wrote:
> Hi,
>
> I need to do some p2v migration of a very old SuSE server.
> Unfortunately, the kernel of that machine doesn''t support running
as xen
> domU, so I need to put the machine into a HVM domU.
>
> Using help from this list, I managed to access the individual HVM guest
> disk''s partitions from the dom0 using kpartx. What I did:
>
> * create a LV /dev/vg_guest/worker1_disk
> * create two partisions on top of /dev/vg_guest/worker1_disk, using
>    fdisk, setting the bootable flag on the first partition
> * using kpartx to access the individual partitions, I ran mkfs.ext3 on
>    the first partition and mkswap on the second partition.
> * I rsync''ed the contents of the physical server''s
filesystem to the
>    first partition
>
> When I now try to boot the HVM machine, I can connect via VNC, however
> the system doesn''t boot properly: On the VNC screen, I can see
"Booting
> from hard disk ...", and nothing happens. "xm top" on the
dom0 shows
> 100% CPU and 34% RAM usage for the domU. I''m somewhat at a loss
here ...
>
> Any help is greatly appreciated =)
>
> Cheers, Andreas.
>
>
> PS: When I "plug in" a Ubuntu live CDROM into the domU''s
config, I can
> boot the system. However I noticed that the two partitions show up as
> /dev/xvda[12], even though I specified "hda" in the
domU''s config:
>
>     kernel = "/usr/lib/xen-4.0/boot/hvmloader"
>     builder=''hvm''
>     vcpus=3
>     memory = 8192
>     shadow_memory = 8
>     name        = ''hvmtest''
>     vif = [''type=ioemu,bridge=xenbr0'']
>     acpi = 1
>     apic = 1
>     disk        = [
''phy:/dev/vg_guest/worker1_disk,hda,w'',
>
>
''file:/home/hilboll/ubuntu-12.04.1-server-amd64.iso,ioemu:hdc:cdrom,r'',
]
>     device_model = ''/usr/lib64/xen/bin/qemu-dm''
>     boot="c"  # boot on floppy (a), hard disk (c) or CD-ROM (d)
>     sdl=0
>     vnc=1
>     vncdisplay=1
>     vfb = [''type=vnc'']
>
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xen.org
> http://lists.xen.org/xen-users



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> did you install bootloader during domU system installation?
Jan, thanks, that was indeed it! I was lucky to be able to find a
OpenSuSE 10.3 installation ISO with which I could install the base
system into my HVM domU, which does indeed boot correctly now =) As a
next step, I''ll rsync the physical server''s filesystem into
the freshly
installed HVM guest (I''ll be sure to make a backup of that one first
;),
and I expect everything to go smoothly.

Thanks again. Cheers,
Andreas.