[Xen-users] help recovering vms

[Mark Foster <mark@xxxxxxxxx>]

I could use some help trying to recover VMs on a system that used to run 
xen-3.0.0 under sarge. The host (Domain0) bit the dust, so I rebuilt it 
using SUSE Linux 10.1 which has xen-3.0.2-2 packages. xend is running 
and I can do xm list, xm info and so on.
It still sees the LVM volume groups that the VM data resides on. My VMs 
are sitting on /dev/vg20/vol01, /dev/vg20/vol03 ....
Because I lost the configs (doh!) I am creating /etc/xen/unknown from 
memory and running
xm create -c unknown
Here is what I get...
Loading xenblk                                
Registering block device major 8
Loading reiserfs               
Waiting for device /dev/sdb1 to appear:  ok
rootfs: major=8 minor=17 devn=2065
Mounting root /dev/sdb1
mount: unknown filesystem type 'ext3'
umount: /dev: device is busy
umount: /dev: device is busy
Kernel panic - not syncing: Attempted to kill init!

I have tried to modprobe ext3 from the Domain0 and also tried using the 
kernel/initrd from the VM by copying them into /boot/kernels/ 
(vmlinuz-2.6.9-22.0.1.EL and initrd-2.6.9-22.0.1.EL.img). The result is 
the same.
What now? I suppose I could create new volumes using reiserfs and rsync 
the data across, but I'd rather use them as is.
Thanks!

Here are the relevant lines from the "unknown" vm config.
kernel = "/boot/vmlinuz-xenpae"
ramdisk = "/boot/initrd-xenpae"
bootentry="/boot/kernels/vmlinuz-2.6.9-22.0.1.EL,/boot/kernels/initrd-2.6.9-22.0.1.EL.img"
memory = 64
name = "unknown"
vif = [ '' ]
disk = [ 'phy:/dev/vg20/vol01,sdb1,w','phy:/dev/vg20/vol02,sdb2,w' ]
dhcp="dhcp"
root = "/dev/sdb1 ro"

--
Some days it's just not worth chewing through the restraints...
Mark D. Foster, CISSP <mark@xxxxxxxxx>  http://mark.foster.cc/



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