[ovirt-users] Backup solution using the API

[Liron Aravot]

----- Original Message -----
> From: "Soeren Malchow" <soeren.malchow at mcon.net>
> To: "Adam Litke" <alitke at redhat.com>, "Nir Soffer" <nsoffer at redhat.com>
> Cc: "Thomas Keppler (PEBA)" <thomas.keppler at kit.edu>, users at ovirt.org
> Sent: Wednesday, February 11, 2015 7:30:48 PM
> Subject: Re: [ovirt-users] Backup solution using the API
> 
> 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 ?
Hi Soeren,
you can find detailed example for Backup/Restore flows here -
http://www.ovirt.org/Features/Backup-Restore_API_Integration

thanks,
laravot.
> 
> 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 at ovirt.org [mailto:users-bounces at ovirt.org] On Behalf Of
> Adam Litke
> Sent: Tuesday, January 6, 2015 5:04 PM
> To: Nir Soffer
> Cc: Thomas Keppler (PEBA); users at 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 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
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