[one-users] Backup and Restore

[Carlo Daffara]

There are many solutions; apart from using kvm snapshots (and later image rebuild to have a single clone) we prefer the use of a filesystem that allows for atomic snapshots (like BTRFS) or
a distributed filesystem with the same properties (like Ceph). You snapshot the entire datastore or the single file you want, and then reimport it within opennebula.
Take care of one thing: if you are using cache=writeback in KVM (or the equivalent in xen or vmware) you are risking inconsistencies, unless you stop the VM, as there are probably outstanding writes that needs to be committed to disk that will not appear in the snapshot at all.
Carlo Daffara

----- Messaggio originale -----
Da: "Soeren Malchow" <soeren.malchow at mcon.net>
A: users at lists.opennebula.org
Inviato: Giovedì, 31 ottobre 2013 7:41:35
Oggetto: [one-users] Backup and Restore



Dear all, 



i already searched the documentation and the mailing list, but did not come up with an answer. 



I would like to know how to backup virtual machines in OpenNebula WITHOUT shutting the down, or if there is a solution at all. 



We have an existing backup system that should be reused, exposure of the virtual machines images files or something like that should be sufficient. 



Can anybody point me into the right direction ? 



Regards 

Soeren 

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