Re: [ovirt-users] Backup solution using the API

From: "Soeren Malchow" <soeren.malchow(a)mcon.net&gt; To: "Adam Litke" <alitke(a)redhat.com&gt;, "Nir Soffer" <nsoffer(a)redhat.com&gt; Cc: "Thomas Keppler (PEBA)" <thomas.keppler(a)kit.edu&gt;, users(a)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 ?

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(a)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(a)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(a)556nato.com&gt; >> To: "Thomas Keppler (PEBA)" <thomas.keppler(a)kit.edu&gt;, users(a)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 _______________________________________________ Users mailing list Users(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/users _______________________________________________ Users mailing list Users(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/users