+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@centos.org wrote:
Message: 3 Date: Thu, 24 Jun 2010 10:52:57 -0400 From: Kelvin Edmisonkelvin@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@centos.org Message-ID:C848E989.30D95%kelvin@kindsight.net Content-Type: text/plain; charset="US-ASCII"
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
CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
End of CentOS-virt Digest, Vol 34, Issue 13
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:
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@centos.org wrote:
Message: 3 Date: Thu, 24 Jun 2010 10:52:57 -0400 From: Kelvin Edmisonkelvin@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@centos.org Message-ID:C848E989.30D95%kelvin@kindsight.net Content-Type: text/plain; charset="US-ASCII"
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
CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
End of CentOS-virt Digest, Vol 34, Issue 13
CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Hi All,
Thanks for all your suggestion. Just a check, if i have a full backup on the server but due to the different specs of the hardware so i am unable to do a bare metal restore, can i just dump all the folders under /var/lib/libvirt which also includes the images folder? Will it work that way?
Here is the folders in libvirt:
[root@pop-kvm-web libvirt]# ls boot images iptables network qemu
Thanks!
yongsan
On Tue, Jun 29, 2010 at 12:27 AM, C.J. Adams-Collier cjac@colliertech.orgwrote:
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:
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 ethernetinterface, 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@centos.org wrote:
Message: 3 Date: Thu, 24 Jun 2010 10:52:57 -0400 From: Kelvin Edmisonkelvin@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@centos.org Message-ID:<C848E989.30D95%kelvin@kindsight.netC848E989.30D95%25kelvin@kindsight.net
Content-Type: text/plain; charset="US-ASCII"
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
CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
End of CentOS-virt Digest, Vol 34, Issue 13
CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
-
C.J. Adams-Collier -
Christopher Hunt -
Poh Yong Hwang