[CentOS-virt] Migrating from KVM to XEN - kernel panic

Christopher Hunt dharmachris at gmail.com
Mon Nov 9 18:55:48 UTC 2009

     Thanks very much for the tip.  That did give me some additional

Scanning and configuring dmraid supported devices
Scanning logical volumes
  Reading all physical volumes.  This may take a while...
Activating logical volumes
  Volume group "virt01vg00" not found
Creating root device.
Mounting root filesystem.
mount: could not find filesystem '/dev/root'
Setting up other filesystems.
Setting up new root fs
setuproot: moving /dev failed: No such file or directory
no fstab.sys, mounting internal defaults
setuproot: error mounting /proc: No such file or directory
setuproot: error mounting /sys: No such file or directory
Switching to new root and running init.
unmounting old /dev
unmounting old /proc
unmounting old /sys
switchroot: mount failed: No such file or directory
Kernel panic - not syncing: Attempted to kill init!

This brings me back to suspecting the problem is in the different file
structures.  I'm still trying to wrap my head around the other replies in
this thread.

On Sat, Nov 7, 2009 at 2:24 PM, Pasi Kärkkäinen <pasik at iki.fi> wrote:

> On Fri, Nov 06, 2009 at 11:49:41AM -0800, Christopher Hunt wrote:
> >    First let me say that I'm not a sysadmin, but am simply wearing that
> hat
> >    this week so please excuse my ignorance.  I need to temporarily move
> some
> >    virtual servers from a CentOS-KVM platform to a CentOS-XEN platform
> while
> >    I do some upgrades to the CentOS box.  I've created a local LV, and
> used
> >    DD and SCP to transfer the block device from the VKM machine to the
> >    machine.  For quite a while I struggled with the "Error: (2, 'Invalid
> >    kernel', 'xc_dom_parse_elf_kernel: ELF image has no shstrtab\n')"
> error
> >    but thanks to Nick Couchman from
> >    [1]
> http://lists.xensource.com/archives/html/xen-users/2008-03/msg00603.html,
> >    I've passed that.  Now I'm stuck with a kernel panic situation.
> >    Unfortunately the kernel panic error doesn't appear using "xm console"
> and
> >    flashes so quickly through "virt-viewer" that I can't get any details.
> >
> Stop the guest and edit /etc/xen/<guest> cfgfile.
> Remove (or comment out) the vfb line, and then restart the guest.
> Now you get the full console output to "xm console".
> -- Pasi
> _______________________________________________
> CentOS-virt mailing list
> CentOS-virt at centos.org
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