Xenmigrate.py export and import example

NOTICE: Xenmigrate does not currently support NFS stored VMs.  This example is for Logical Volume stored VMs.

If you've used the migrate program to export to a raw file (don't confuse an "export" using the xenmigrate program with an "export" from Xen Center), you'll then need to use the import function of the program to turn that raw file into a logical volume that open source xen can then use as its disk.  Here's a run through of an export and import on my system...

First we export from the source machine.  Adjust the export and virtual name location accordingly.  In my case, I mounted an NFS share under /mnt and have a virtual with a name-label of "nessus01":

[root@xen01 xentool]# python xenmigrate.py -x /mnt/nessus01 nessus01
xenmigrate 0.6.2 -- 2009.01.05

vm name-label     : nessus01
vm uuid           : 75177e74-92de-1efc-be47-d7047ad62b69
vm disk uuid      : e236d60f-ad35-4887-ad0a-c187d8093a07
vm disk partid    : xvda
vm disk uuid      : dae12c56-6702-4e56-bb15-530aa43d1019
vm disk partid    : xvdd
export dev       : /dev/VG_XenStorage-8aa40725-3429-83d5-a560-e5c18dd19efe/LV-e236d60f-ad35-4887-ad0a-c187d8093a07
to raw file      : /root/mnt/nessus01_xvda_8.00

Activating Volume:
    Using logical volume(s) on command line
    Activating logical volume "LV-e236d60f-ad35-4887-ad0a-c187d8093a07"
    Found volume group "VG_XenStorage-8aa40725-3429-83d5-a560-e5c18dd19efe"
    Creating VG_XenStorage--8aa40725--3429--83d5--a560--e5c18dd19efe-LV--e236d60f--ad35--4887--ad0a--c187d8093a07
    Loading VG_XenStorage--8aa40725--3429--83d5--a560--e5c18dd19efe-LV--e236d60f--ad35--4887--ad0a--c187d8093a07 table
    Resuming VG_XenStorage--8aa40725--3429--83d5--a560--e5c18dd19efe-LV--e236d60f--ad35--4887--ad0a--c187d8093a07 (252:18)

RW notification every: 1.0GB
Exporting: 1.0GBrw 2.0GBrw 3.0GBrw 4.0GBrw 5.0GBrw 6.0GBrw 7.0GBrw 8.0GBrw
Successful export

Deactivating Volume:
    Using logical volume(s) on command line
    Deactivating logical volume "LV-e236d60f-ad35-4887-ad0a-c187d8093a07"
    Found volume group "VG_XenStorage-8aa40725-3429-83d5-a560-e5c18dd19efe"
    Removing VG_XenStorage--8aa40725--3429--83d5--a560--e5c18dd19efe-LV--e236d60f--ad35--4887--ad0a--c187d8093a07 (252:18)
    Found volume group "VG_XenStorage-8aa40725-3429-83d5-a560-e5c18dd19efe"
You many need to restart your VM:
xe vm-startup -u root uuid=75177e74-92de-1efc-be47-d7047ad62b69

Then we import on the destination open source xen machine.  Change the mnt locaiton and the Volume Group accordingly.  In my case I had a ./mnt mounted to my NFS share and a Volume Group named VolGroup00.  You need to be using LVM storage on open source Xen (the recommended way) for this to work:

[root@xen04 xentool]# python xenmigrate.py -i mnt/nessus01_xvda_8.00 VolGroup00
xenmigrate 0.6.2 -- 2009.01.05

import raw file   : mnt/nessus01_xvda_8.00
to lv             : nessus01
in vg             : VolGroup00
lv size           : 8.00GB
xen config partid : xvda

Creating Logical Volume:
    Setting logging type to disk
    Finding volume group "VolGroup00"
    Archiving volume group "VolGroup00" metadata (seqno 1511).
    Creating logical volume nessus01
    Creating volume group backup "/etc/lvm/backup/VolGroup00" (seqno 1512).
    Found volume group "VolGroup00"
    Creating VolGroup00-nessus01
    Loading VolGroup00-nessus01 table
    Resuming VolGroup00-nessus01 (253:18)
    Clearing start of logical volume "nessus01"
    Creating volume group backup "/etc/lvm/backup/VolGroup00" (seqno 1512).

RW notification every: 1.0GB
Importing: 1.0GBrw 2.0GBrw 3.0GBrw 4.0GBrw 5.0GBrw 6.0GBrw 7.0GBrw 8.0GBrw
Successful import

Then you need to add the appropriate information to your virtual's configuration file:

disk       = ['phy:/dev/VolGroup00/nessus01,xvda,w']
root = '/dev/xvda1 ro'