[Xen-users] Migrating domU : image file based to LVM partition

[Nuno Loureiro Ferreira <nunolf@xxxxxxxxx>]

Hey *

I've some SL47 PV domU's running on CentOS5.3 running  Xen version 
3.1.2-128.1.6.el5, created with virt-install.
These domU's are image file based, with only one partition inside (/). 
They are already configured for my purposes and its time to dump these 
domU's to partitions (LVM partitions already in place) for performance 
reasons.
And, I'm having problems doing it.

1 - How do I dump the content of a domU to a LVM partition?
    Did the following:
    kpartx -va domu.img
    mount /dev/mapper/loop0p1 /mnt/loop
    mount /dev/vg0/domu  /mnt/domu
    cp -ax  /mnt/loop /mnt/domu
    umount /mnt/domu; umount /mnt/loop;
    kpartx -vd domu.img

A quick look inside /mnt/domu ... and all the original contents of the 
.img disk file seems to be there.
Is there a more direct way of doing such procedure?

2 - After step 1) I edited the xen config file (see below) as well as 
the /etc/fstab and /boot/grub/menu.lst accordingly.
But get the following error:

xm create bdii-enmr.xen -c
        Using config file "./bdii-enmr.xen".
        No handlers could be found for logger "xend"
        Error: Disk isn't accessible
        Usage: xm create <ConfigFile> [options] [vars]
        [... snip ...]



name = "domu"
maxmem = 512
memory = 512
vcpus = 1
bootloader = "/usr/bin/pygrub"
on_poweroff = "destroy"
on_reboot = "restart"
on_crash = "restart"
vfb = [  ]
# Previously :
#disk = [ "tap:aio:/data/enmr/domU/bdii/bdii-enmr.img,xvda,w",
#         "phy:vg0/domu.bdii_enmr.swap,/dev/xvda2,w"
#       ]
#
# Currently :
disk = [ "phys:vg0/domu.main,xvda1,w",
           "phy:vg0/domu.swap,xvda2,w"
         ]
vif = [ "mac=00:16:3E:0F:51:53,bridge=xenbr0" ]


A couple of months ago I had some domu's LVM based created by 
virt-install. And I was not having problems booting up the VM's
Cheers,
N.

P.S.Did the test, because I'm not receiving my own e-mails.
Went to the xen-users mailing list membership configuration, and all 
seems ok.

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