[CentOS-virt] (KVM) How can I migrate VM in a non shared storage environment?

C.J. Adams-Collier cjac at colliertech.org
Mon Jun 28 12:27:46 EDT 2010


If you do it often, you might consider listening for ssh connections on
a separate port and using tc to keep things from getting out of hand:

http://linux.die.net/man/8/tc

Cheers,

C.J.

On Mon, 2010-06-28 at 09:17 -0700, Christopher Hunt wrote:
> +1 for dd + nc over ssh if necessary.
> 
> 	This process can and probably will saturate your ethernet interface, so 
> depending upon the amount of traffic the box pushes on the public 
> interface the size of the partition and other factors, sometimes i add a 
> crossover cable between unused interfaces on the 2 boxes and run the 
> process over that interface, so it doesn't impact the running vms.
> 
> Cheers
> -Chris
> 
> On 6/24/2010 9:00 AM, centos-virt-request at centos.org wrote:
> 
> > Message: 3
> > Date: Thu, 24 Jun 2010 10:52:57 -0400
> > From: Kelvin Edmison<kelvin at kindsight.net>
> > Subject: Re: [CentOS-virt] (KVM) How can I migrate VM in a non shared
> > 	storage environment?
> > To: Discussion about the virtualization on CentOS
> > 	<centos-virt at centos.org>
> > Message-ID:<C848E989.30D95%kelvin at kindsight.net>
> > Content-Type: text/plain;	charset="US-ASCII"
> >
> >
> >
> >
> > On 24/06/10 7:17 AM, "Poh Yong Hwang"<yongsan at 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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> >
> > End of CentOS-virt Digest, Vol 34, Issue 13
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