backup-script

BTRFS backup script in Python

An easy automated snapshotting and send/receive backups with BTRFS filesystems

This command works in complement with the snapshotter-script. It should be run like this example of every four hours:

sudo crontab -u root -e m h dom mon dow command 1 * * * * /usr/bin/backup-script.py --snapshot

• */4 * * * /usr/bin/backup-script.py --snapshot --backup

Both backup host and backup drive should have mount options -noatime,compress. This script assumes that:

• /media exists
• /media/btrfs has been mounted with the command sudo mount -o subvolid=0 /dev/sdN /media/btrfs.
• backup drive has "toplevel", "home" and "arch" top-level directories

This script generates the following the following disk layout:

media/

  btrfs/ (holds catalogue of snapshots)
    @home/
    @arch/
    @toplevel/
    home/
      home.20140415/
      home.20140416/
      ...
    arch/
      arch.20140415/
      arch.20140416/
      ...
    toplevel/
      toplevel.20140415/
      toplevel.20140416/
      ...

    backup/ (points to backup device.  Backups get stored here.)
      home/
        home.20140415/
        home.20140416/
        ...
      arch/
        arch.20140415/
        arch.20140416/
        ...
      toplevel/
        toplevel.20140415/
        toplevel.20140416/
        ...