2:04 p.m.
I've been using oVirtBackup in the past few years and also I've done more
restores from this backup than I'd have liked. All restores were
successful. I'm pretty happy with this script:
https://github.com/wefixit-AT/oVirtBackup
Well documented, easy to install and configure.
In summary the script uses the API to take a snapshot, convert it to a VM,
export the VM, remove the snapshot. It also removes old backups, checks for
free storage space, and so on.
It's basically set and forget.
I just wrote my own little bash wrapper that will grab the output of the
script and email it to me.
Hope this helps,
-- Peter
On Mon, May 13, 2019 at 8:12 AM Jayme <jaymef(a)gmail.com> wrote:
I know that a robust API is provided for performing VM backup
functions,
but it seems crazy to me that oVirt has not implemented a simple method to
backup VM to a storage domain such as an NFS export domain. Is this
functionality being left out for a reason (perhaps not wanting to step on
toes of 3rd party software vendors providing backup solutions for
oVirt/RHEV)?
On Mon, May 13, 2019 at 11:21 AM Gianluca Cecchi <
gianluca.cecchi(a)gmail.com> wrote:
> On Mon, May 13, 2019 at 3:47 PM Derek Atkins <derek(a)ihtfp.com> wrote:
>
>> Strahil <hunter86_bg(a)yahoo.com> writes:
>>
>> > Another option is to create a snapshot, backup the snapahot and merge
>> > the disks (delete the snapshot actually).
>> > Sadly that option doesn't work with Databases, as you might inyerrupt
>> > a transaction and leave the DB in inconsistent state.
>>
>> Yet another reason to do it from inside the VM.
>>
>
> Actually doable, depending on DB architecture and if some
> "logging/archiviing" supported/enabled on database.
> See here related threads where I was involved:
>
>
https://lists.ovirt.org/archives/list/users@ovirt.org/message/LJFQOLIWU22...
> and here:
>
>
https://lists.ovirt.org/archives/list/users@ovirt.org/thread/J65N7E2PY3KW...
>
> When you install qemu-guest-agent (in my case
> version 0.12.1.2-2.506.el6_10.1) you also get an example for MySQL in
> /usr/share/qemu-kvm/qemu-ga/fsfreeze-hook.d/mysql-flush.sh.sample
> and eventually updated code (actually I see it is dated 2013...) here:
>
>
https://github.com/guillon/qemu-plugins/blob/master/scripts/qemu-guest-ag...
>
> In case of PostgreSQL you would need to have WAL enabled and do an
> Exclusive Low Level Backup, because the pre-snapshot and post-snapshot
> could not be inside the same RDBMS session connection:
>
> https://www.postgresql.org/docs/10/continuous-archiving.html#BACKUP-BASE-...
>
> so the freeze option of your freeze-hook script would contain a call to a
> connection that runs
> SELECT pg_start_backup('label', true);
> to minimize time to do checkpoint
>
> and the thaw option would contain
> SELECT pg_stop_backup();
>
> This needs also that archives during the elapsed of backup (and the last
> generaed when stopping backup) are copied in some way externally in respect
> of the VM OS for complete recoverability, if you don't already have it for
> your standard archiving policy.
>
> And thoroughly test the whole workflow, both backups and restores,
> especially when upgrading your software layers, oVirt, VM OS, PostgreSQL....
>
> HIH,
> Gianluca
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