[ovirt-users] ovirt-agent: is it possible to run specific actions when taking snapshots?

[Yaniv Dary]

We use libvirt VIR_DOMAIN_SNAPSHOT_CREATE_QUIESCE flag, which uses guest agent to quiesce all mounted file systems within the domain.
The qemu guest agent implements fsfreeze/fsthaw commands, which do the quiescing.



On 05/12/2015 02:56 PM, Ernest Beinrohr wrote:
> It would be nice, if ovirt snapshots were more safe. When a VM has the 
> ovirt-agent installed, ovirt could tell the agent to run site-speficic 
> actions. What I have in mind is:
>
> linux vms:
> - sync
> - echo 3 > /proc/sys/vm/drop_caches
> - zerofill empty space (this takes long but saves precious backup space)
>
> databases:
> - prepare databases for snapshot (flush,write-lock)
> - send snapshot-complete and unlock
>
>
> -- 
> Ernest Beinrohr, AXON PRO
> Ing <http://www.beinrohr.sk/ing.php>, RHCE 
> <http://www.beinrohr.sk/rhce.php>, RHCVA 
> <http://www.beinrohr.sk/rhce.php>, LPIC 
> <http://www.beinrohr.sk/lpic.php>, VCA <http://www.beinrohr.sk/vca.php>,
> +421-2-62410360 +421-903-482603
>
>
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-- 
Yaniv Dary
Technical Product Manager
Red Hat Israel Ltd.
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