Create a new virtual machine on your storage. After this, boot some Linux distribution in your new virtual machine (I like SysrescueCD). Enable your ssh server, change the root password and so and back to your old virtual server and type:
# dd if=/dev/sda | ssh root@(new_vm) "(dd of=/dev/sda)"
Type the root password, shutdown the old VM and reboot your new vm.
(PS: You don't need to shutdown the old vm to this proccess).
I do this everytime, I don't like copy the HD files using cp, tar or rsync because it try to copy the /proc, /dev and a lot virtual devices. Using dd it copies just the HD bits, the boot sector, etc.
2010/6/24 C.J. Adams-Collier cjac@colliertech.org
I often use rsync -a for remote systems or cp -a for local systems. I've also used dd. You can have dd output to stdout, pipe it to ssh and have ssh output to dd on the other end.
You can also connect to a SAN device on the source and dd from the local block device to the SAN device.
Lots of ways to do it ;)
Cheers,
C.J.
On Thu, 2010-06-24 at 10:52 -0400, Kelvin Edmison wrote:
On 24/06/10 7:17 AM, "Poh Yong Hwang" yongsan@gmail.com wrote:
I have a server running CentOS 5.5 with KVM capabilities. I need to
migrate
all the VMs to another server with the exact same hardware specs. The
problem
is it is running on individual harddisks, not shared storage. What is
the best
way to migrate to minimise downtime?
I've had good success using dd and nc (netcat) to copy the contents of a disk or disk image from one machine to another, and verifying the copy
was
successful with a md5sum or sha1sum of both the original and copied disk.
Kelvin
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