Dear all, i am a little lost, i tried quite a few things with the snapshots, so far with python scripts I can iterate through the existing machines, take one, make a snapshot and all this. However, there are 2 problems I can not get around: 1. even when on 3.5.1 I can not delete a snapshot on a running VM, if I understood that correctly this relies on the Live Merge Feature where the code is available in vdsm already but it needs a certain libvirt version !?!? So question here is, can I delete a snapshot or not ? can I use only the rest API not python (excuse me I am not a developer) 2. when I attach a snapshot to another virtual machine, how do I do the backup then ? Does anybody have this already ? The environment is running on CentOS 7 (hypervisors), Centos 6 (hosted engine), the ovirt is on version 3.5.1, also we use gluster as a storage backend where the gluster servers are managed within the hosted engine in a separate cluster exporting the storage only. Regards Soeren -----Original Message----- From: users-bounces@ovirt.org [mailto:users-bounces@ovirt.org] On Behalf Of Adam Litke Sent: Tuesday, January 6, 2015 5:04 PM To: Nir Soffer Cc: Thomas Keppler (PEBA); users@ovirt.org Subject: Re: [ovirt-users] Backup solution using the API On 15/12/14 04:31 -0500, Nir Soffer wrote:
----- Original Message -----
From: "Blaster" <Blaster@556nato.com> To: "Thomas Keppler (PEBA)" <thomas.keppler@kit.edu>, users@ovirt.org Sent: Wednesday, December 10, 2014 8:06:58 PM Subject: Re: [ovirt-users] Backup solution using the API
On 11/27/2014 9:12 AM, Keppler, Thomas (PEBA) wrote:
Now, before I go into any more hassle, has somebody else of you done a live-backup solution for oVirt? Are there any recommendations? Thanks for any help provided!
I've been looking for a similar scheme for the last year. It was not (really) possible in the past as there wasn't any way to destroy a snapshot w/o shutting down the VM. Is this still the case, or are snap shots fully implemented now?
Basically, I'd like to: Tell VM to flush it's buffers suspend VM take snap shot of boot virtual disk resume VM
You don't need to suspend the vm, qemu can create live snapshot. When the snapshot is done, you don't care about future io, it will simply not included in the backup.
backup the virtual boot disk from the Hypervisor using standard commands (tar, cp, whatever)
You can by attaching the snapshot to another vm
destroy the snapshot
You can in ovirt 3.5.1 - we do not depend any more on future libvirt features. Adam, can you confirm?
Yes, on 3.5.1 you'll be able to destroy the snapshot without impacting the running VM.
This would at least give some BMR capabilities of your VMs.
Ideally, I'd also like to be able to create a snapshot from within the VM, do
You can do this "within" the vm by using the engine REST API. But this can be fragile - for example, if the vm pauses, your backup tool within the vm will never complete :-)
a yum update, see if I like it or not, if I do, then destroy the snap shot.
Possible in 3.5.1 using REST API
If I don't, I want to promote the snapshot and boot from that, then destroy the "original".
Same
Nir
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