[ovirt-users] Backup solution using the API

[Adam Litke]

On 15/12/14 04:31 -0500, Nir Soffer wrote:
>----- Original Message -----
>> From: "Blaster" <Blaster at 556nato.com>
>> To: "Thomas Keppler (PEBA)" <thomas.keppler at kit.edu>, users at 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

-- 
Adam Litke