similar to: Using virsh blockcopy -- what's it supposed to accomplish?

On Thu, Jan 08, 2015 at 01:44:58PM -0600, Gary R Hook wrote: > On 12/24/14 4:42 AM, Kashyap Chamarthy wrote: > >On Tue, Dec 23, 2014 at 12:38:57PM -0600, Gary R Hook wrote: > > > >[. . .] > > > >In my case, the block device is a QCOW2 disk image file. If I boot > >without using the disk image file which has the operating system, the > >domain will fail

On 01/08/2015 12:44 PM, Gary R Hook wrote: > I've learned how to use the blockcopy command to create a local copy in > a simple disk file: > > virsh dumpxml my_domain > my_domain.xml > virsh undefine my_domain > virsh blockcopy --domain my_domain vda $PWD/dsk.copy.qcow2 --wait > --verbose --finish > virsh define my_domain.xml > > and the resulting copy in

On 12/24/14 4:42 AM, Kashyap Chamarthy wrote: > On Tue, Dec 23, 2014 at 12:38:57PM -0600, Gary R Hook wrote: > > [. . .] > > In my case, the block device is a QCOW2 disk image file. If I boot > without using the disk image file which has the operating system, the > domain will fail to boot, no? > > I see you're playing with NBD disks. I'll admit, I haven't

On 1/8/15 2:21 PM, Kashyap Chamarthy wrote: >> qemu-img create -f qcow2 /tmp/dsk.test.qcow2 > > A typo? You also need to provide a size here: > > $ qemu-img create -f qcow2 /tmp/dsk.test.qcow2 1G Yes, my mistake. The size is set to the potential size of the source disk, which in this case is 20G. > For the rest, I'm afraid I still didn't manage time to test

On Mon, Dec 22, 2014 at 03:50:58PM -0700, Eric Blake wrote: > On 12/22/2014 03:27 PM, Gary R Hook wrote: > > I am experimenting with the blockcopy command, and after figuring out > > how to integrate qemu-nbd, nbd-client and > > dumpxml/undefine/blockcopy/define/et. al. I have one remaining question: > > > > What's the point? > > Among other uses, live

Thank you Eric, On 2014-02-05 17:23, Eric Blake wrote: > Yes, live storage migration is possible; although at the moment, qemu is > lacking a way to restart the operation if it fails midstream, so libvirt > only allows the operation if you are willing to temporarily make your > guest transient. What does this mean? Will I loose anything if - for example - there is not enough space on

Hi, Is it possible to "pivot" to a new image without doing blockcopy or blockpull? I know how to use snapshots and blockpull to create a new image and pivot to using it live, but what I would like to do is to have a VM switch from using imageA.qcow2 to image2.qcow2 while running. I don't see why this wouldn't be possible since some of the existing libvirt tools can do this when

I have lvm based (thin pool) storage on local disks. I need to move vps from one vg on one disk to another. Does it possible to migrate to localhost with blockcopy migration to another vg? I'm understand that i can move lv from one vg to another, but i don't need that. -- Vasiliy Tolstov, e-mail: v.tolstov@selfip.ru jabber: vase@selfip.ru

On Thu, Jun 11, 2020 at 05:45:46PM +0200, Paul van der Vlis wrote: > Hello, > > I am looking for a way to migrate a VM live to another location. > > The qcow2 images are now on /data , but I want to move some of them to a > volume mounted on /data2 what's faster. > > Is this possible without downtime? Yes, you don't need to use live migration for this even. The

On 12/23/2014 05:24 PM, Gary R Hook wrote: > I read that article. > > Now shut down the domain (post-pivot) which is using the new disk file, > and start it up, without using a block device. This is the part that no > one seems to write about, nor do I see that in your example. But thank > you very much for your help and your articles; very much appreciated. What do you mean by

Hello, I have two servers where I can push VMs from one to the other by issuing the command virsh migrate --live --persistent --copy-storage-all --verbose \ test6 qemu+ssh://kvmhost2/system on kvmhost1. I can get the VM back by issuing the equivalent command on kvmhost2: virsh migrate --live --persistent --copy-storage-all --verbose \ test6 qemu+ssh://kvmhost1/system virsh

Hi Eric, Thanks for the info. I see the value in this, but it isn't quite what I was looking for. Basically what I want to do is to switch between snapshots quickly. For instance, I am currently working on designing a HA SQL implementation with failover. So right now I have 5 VM's running postgresql as a replication group. I am trying a lot of different things and often have to take a

Am 10.06.13 10:40, schrieb Kashyap Chamarthy: > On 06/10/2013 01:20 PM, Thomas Stein wrote: >> Am 10.06.13 09:07, schrieb Kashyap Chamarthy: >>> On 06/09/2013 02:46 PM, Thomas Stein wrote: >>>> Hello. >>>> >>>> I just tried the following: >>>> >>>> virsh dumpxml --security-info gentoo-template > gentoo-template.xml

Versions -------- (Libvirt locally built from a recent git commit -ec7b922): $ rpm -q libvirt-daemon-kvm qemu-system-x86 libvirt-daemon-kvm-1.2.6-1.fc20.x86_64 qemu-system-x86-2.0.0-1.fc21.x86_64 Test ---- [All images are qcow2 files.] We have this simple chain: base <- snap1 Let's quickly examine the contents of 'base' and 'snap1' images:

I am searching for directions for using live block migration to copy running vm's to a different storage pool. Example: VM1 running on Host1, the image(s) for VM1 are stored in /var/lib/libvirt/images. I'd like to copy the disk image(s) that VM1 is using to /nfs/images. Without stopping/pausing/powering down the VM. Do you have any examples or documentation of how to accomplish this

Hello. I just tried the following: virsh dumpxml --security-info gentoo-template > gentoo-template.xml virsh snapshot-create gentoo-template virsh undefine gentoo-template virsh blockcopy gentoo-template vda /opt/virt-backup-blockcopy/gentoo-template/gentoo-template.qcow2 --wait --verbose --finish virsh define gentoo-template.xml virsh snapshot-delete gentoo-template --current But if i

Am 10.06.13 09:07, schrieb Kashyap Chamarthy: > On 06/09/2013 02:46 PM, Thomas Stein wrote: >> Hello. >> >> I just tried the following: >> >> virsh dumpxml --security-info gentoo-template > gentoo-template.xml >> virsh snapshot-create gentoo-template >> virsh undefine gentoo-template > > Wait - is that really the command you used after

Hello guys! We want to move some guests' disk images to different locations (within the same machine, locally), but we do not want to turn off the guests. Can we do that while the guest is running, like live migration? I did not find any related documentation or posts about it. Let's say the guest has a disk at /ssd/image.raw We want to move that to /hdd/image.raw Is there any way to

> Your quoting is horrible. You used the same prefix for your original > content as for my reply (">> >" in both cases). I'm not sure what > mailer you are using, but it is making conversation difficult. OK, let's see if this is better. Turned out my email app wasn't doing text wrap and quoting prefix default was bizarre....my apologies. > > >

Hello, I recently compiled libvirt 1.0.1 and qemu 1.3.0 on Ubuntu 12.04. I have performed live snapshots on VMs using "virsh snapshot-create-as" and then later re-merge the images together using "virsh blockpull". I am wondering how I can do a couple of other operations on the images while the VM is running. For example, VM1 is running from the snap3 image, with the following