On 20 Sep 2013, at 15:31, Thomas Stein <himbeere(a)meine-oma.de&gt; wrote: Hello. Is someone performing incremental backups via libvirt for qemu/kvm machines? I'm still having a hard time to find a nice procedure. I mean is it possible to make a full backup of an image on monday a do the next days of the week incremental backups? Another way could be mount the image and rsync its contents. Does that makes sense? Also i read in qemu changelog: --- Support for a new block device background job. Started by drive-backup, it will backup a disk's content to a new file. Unlike drive-mirror, the new file will include the source disk's content at the time the backup job was started. Atomic backup of multiple disks is supported using the "transaction" QMP command. --- Is this supported by libvirt? thanks and best regards thomas _______________________________________________ libvirt-users mailing list libvirt-users(a)redhat.com https://www.redhat.com/mailman/listinfo/libvirt-users

hn LibVirtKvm-scripts # ./fi-backup.sh -b /opt/virt-backup-local/ -d serve.lordcritical [DEB] qemu-img version '1.6.0' is supported [DEB] KVM version '1.6.0,' is supported [DEB] Snapshot for domain 'serve.lordcritical' requested [DEB] Using timestamp '20130920-151742' [DEB] Snapshotting block devices for 'serve.lordcritical' using suffix 'bimg-20130920-151742' [VER] Snapshot for block devices of 'serve.lordcritical' successful [ERR] Error getting backing file for '/var/lib/libvirt/images/serve.lordcritical.bimg-20130920-151742'.

At the moment i try: https://bitbucket.org/guilhemfr/virt-back

On 2013-09-20 16:05, Davide Guerri wrote: > Hi >> hn LibVirtKvm-scripts # ./fi-backup.sh -b /opt/virt-backup-local/ -d serve.lordcritical >> [DEB] qemu-img version '1.6.0' is supported >> [DEB] KVM version '1.6.0,' is supported >> [DEB] Snapshot for domain 'serve.lordcritical' requested >> [DEB] Using timestamp '20130920-151742' >> [DEB] Snapshotting block devices for 'serve.lordcritical' using suffix 'bimg-20130920-151742' >> [VER] Snapshot for block devices of 'serve.lordcritical' successful >> [ERR] Error getting backing file for '/var/lib/libvirt/images/serve.lordcritical.bimg-20130920-151742'. > Will you please send me the output of the following? > qemu-img info /var/lib/libvirt/images/serve.lordcritical.bimg-20130920-151742 Looks okay actually. hn LibVirtKvm-scripts # ./fi-backup.sh -b /opt/virt-backup-blockcopy/ serve.lordcritical [ERR] Error getting backing file for '/var/lib/libvirt/images/serve.lordcritical.bimg-20130920-170511'. hn LibVirtKvm-scripts # qemu-img info /var/lib/libvirt/images/serve.lordcritical.bimg-20130920-170511 image: /var/lib/libvirt/images/serve.lordcritical.bimg-20130920-170511 file format: qcow2 virtual size: 40G (42949672960 bytes) disk size: 196K cluster_size: 65536 backing file: /var/lib/libvirt/images/serve.lordcritical.bimg-20130920-170121 backing file format: qcow2 hn LibVirtKvm-scripts # cheers t. > Thanks! >> At the moment i try: >> https://bitbucket.org/guilhemfr/virt-back > Seems very interesting and promising. I will try it! > Cheers, > D. _______________________________________________ libvirt-users mailing list libvirt-users(a)redhat.com https://www.redhat.com/mailman/listinfo/libvirt-users

** Hi Davide, Hi Thomas, I'm using this script which leverages external snapshots and blockpull: https://github.com/dguerri/LibVirtKvm-scripts It's very simple and on ubuntu requires some tweaks on apparmour configuration. Would it be hard to adapt this script for LVM-backed VMs? []s, Fernando Lozano _______________________________________________ libvirt-users mailing list libvirt-users(a)redhat.com https://www.redhat.com/mailman/listinfo/libvirt-users

Hello. Is someone performing incremental backups via libvirt for qemu/kvm machines? I'm still having a hard time to find a nice procedure. I mean is it possible to make a full backup of an image on monday a do the next days of the week incremental backups?

Another way could be mount the image and rsync its contents. Does that makes sense? Also i read in qemu changelog: --- Support for a new block device background job. Started by drive-backup, it will backup a disk's content to a new file. Unlike drive-mirror, the new file will include the source disk's content at the time the backup job was started. Atomic backup of multiple disks is supported using the "transaction" QMP command. --- Is this supported by libvirt? thanks and best regards thomas _______________________________________________ libvirt-users mailing list libvirt-users(a)redhat.com https://www.redhat.com/mailman/listinfo/libvirt-users

Am 23.09.13 16:00, schrieb Daniel Berteaud: > Le vendredi 20 septembre 2013 à 15:31 +0200, Thomas Stein a écrit : >> Hello. >> >> Is someone performing incremental backups via libvirt for qemu/kvm >> machines? I'm still having a hard time to >> find a nice procedure. I mean is it possible to make a full backup of an >> image on monday a do the next days of the week >> incremental backups? > > You can take a look at this script: > http://gitweb.firewall-services.com/?p=virt-backup;a=blob_plain;f=virt-ba... Hello Daniel. Thank you but unfortunately i don't have a LVM setup.

cheers t. > I'm using it on several servers. You can either take a full backup (raw > dd of your LV), or incremential backups. Incrementials are done this > way: > > - pause the VM > - take an LVM snapshot of each of its disk > - resume the VM > - use chunkfs to mount the LVM snapshots as if it was a lot of small > files > - now you can rsync the fuse mount point using rsync, and only modified > blocks will be transfered. If you use something like BackupPC or > rsnapshot, it'll also only store on disk the modified blocks > > > Regards, Daniel >> >> Another way could be mount the image and rsync its contents. Does that >> makes sense? >> >> Also i read in qemu changelog: >> >> --- >> Support for a new block device background job. Started by drive-backup, >> it will backup a disk's content to a new file. Unlike drive-mirror, the >> new file will include the source disk's content at the time the backup >> job was started. Atomic backup of multiple disks is supported using the >> "transaction" QMP command. >> --- >> >> Is this supported by libvirt? >> >> thanks and best regards >> thomas >> >> _______________________________________________ >> libvirt-users mailing list >> libvirt-users(a)redhat.com >> https://www.redhat.com/mailman/listinfo/libvirt-users > _______________________________________________ libvirt-users mailing list libvirt-users(a)redhat.com https://www.redhat.com/mailman/listinfo/libvirt-users