btrfs-snp

Create BTRFS snapshots, manually or from cron.

Usage

# btrfs-snp
Usage: btrfs-snp <dir> (<tag>) (<limit>) (<seconds>) (<destdir>)

  dir     │ create snapshot of <dir>
  tag     │ name the snapshot <tag>_<timestamp>
  limit   │ keep <limit> snapshots with this tag. 0 to disable
  seconds │ don't create snapshots before <seconds> have passed from last with this tag. 0 to disable
  destdir │ store snapshot in <destdir>, path absolute or relative to <dir>

Examples

Manual

Snapshot of home

# btrfs-snp /home

Tagged snapshot of root

# btrfs-snp / preupgrade

Tagged snapshot of root, but keep maximum 10

# btrfs-snp / preupgrade 10

Cron

Hourly snapshot for one day, daily for one week, weekly for one month, and monthly for one year.

# cat > /etc/cron.hourly/btrfs-snp <<EOF
#!/bin/bash
/usr/local/sbin/$BIN /home hourly  24 3600
/usr/local/sbin/$BIN /home daily    7 86400
/usr/local/sbin/$BIN /home weekly   4 604800
/usr/local/sbin/$BIN /     weekly   4 604800
/usr/local/sbin/$BIN /home monthly 12 2592000
EOF
chmod +x /etc/cron.hourly/btrfs-snp

Inspired by btrfs-snap by Birger Monsen

More at ownyourbits.com