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maakuth/backup.sh

Created August 20, 2013 07:18
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Neat way to getting consistent backups of stuff by utilizing LVM snapshots. In my setup /backuptarget is an USB hard drive, but it could be sshfs, smb or nfs share just as well.
Raw
backup.sh
#!/bin/sh
. /etc/environment
lvcreate -l90%FREE -s -n rootsnap /dev/host/root
#XFS specific: Mounting ignoring uuid because the original volume has same uuid
mount -o ro,nouuid /dev/host/rootsnap /mnt/rootsnap
mount /backuptarget
#Purge history
rdiff-backup --remove-older-than 1Y /backuptarget/stuff
#Actual backup
rdiff-backup --exclude /mnt/rootsnap/stuff/NotInNeedOfBackingUp /mnt/rootsnap/stuff /backuptarget/stuff
umount /backuptarget
umount /mnt/rootsnap
lvremove -f /dev/host/rootsnap
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