Hi Miles,
This util simply creates a VM and doesn't incorporate any PVM kernels
into your VM.
So basically use it to only create HVMs and then if needed like I
have, convert the HVM to a PVM.
I actually prefer having control over the HVM to PVM process.
Not sure if I'm using the terminology correctly but;
HVM - hardware virtual machine.
PVM - para virtual machine.
- Brian
On Feb 16, 2009, at 6:23 PM, Miles Fidelman wrote:
Brian,
Whoa... that's cool. Unfortunately, I'm not sure my target machine
is going to support the VT extensions. Why the requirement?
Thanks,
Miles
Brian Krusic wrote:
Hi,
Well, a slightly less elegant solution but one I've done several
times is to boot the machine you want to turn into a VM using this
CD;
http://et.redhat.com/~rjones/virt-p2v/
But the caveat is that you must first have a Xen dom0 on a machine
supporting Intel VT or AMD V extensions. That machine must have
SSH open as well.
Summary of what happens;
1 - Boot the p2v CD.
2 - Answer several self guided questions.
3 - An image of the entire disk is created over the net via SSH on
your VT/V enabled dom0.
The down side is that the domU image file is the same size as the
entire source disk. What I've done since is to create a new HVM
domU where not all the image is allocated (a sparse file) and then
kpartx/lomount/mount the original HVM and new HVM and then dump |
restore from the original HVM to the new HVM.
This may seem a little Polish to some of you, but hey, I am 1/4
Polak :)
- Brian
On Feb 16, 2009, at 2:15 PM, Thomas Halinka wrote:
Hi Miles,
Am Montag, den 16.02.2009, 16:47 -0500 schrieb Miles Fidelman:
Hi,
I have an old server, running Debian Sarge. I'm getting ready to
migrate to a new machine - more horsepower, newer version of
Debian, etc.
Good plan ;-)
As an interim step to migrating all of my production stuff, it sure
would be nice to generate a snapshot of the current system, turn
it into
an image file, and get it running on the new box, as a VM.
Any suggestions as to procedures and tools for imaging an
existing system?
First boot up your old-system into rescue-mode (use knoppix, grml,
whatever) to get a consitent system....
Steps in dom0:
#################
create an empty image file on dom0
dd if=/dev/zero of=/path/to/images/sarge-disk bs=1M count=5000
---> creates a 5GB-Disk
Format it
mkfs.ext3 /path/to/images/sarge-disk
Mount it
mount -o loop /path/to/images/sarge-disk /mnt
Copy your data into it
rsync -avzH --numeric-ids -e ssh root@old-system:/* /mnt/
umount && create domu.cfg
umount /mnt && cd /etc/xen && cp $extisting-domu.cfg sarge.cfg
vim sarge.cfg
Thanks much,
Miles Fidelman
hth,
Thomas
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