btrfs_snap

Create, remove and list your snapshots. Works with crontab.

What is does tl;dr

The script btrfs_snap.sh is given parameters to create hourly|daily|weekly|monthly|yearly snapshots.
Location of the snaps are set in string base_dir="/home/.snapshots/" in the script.
There are 2 target directories to snap; the data share /home/DATA (Users shared files) and PCs /home/BACKUP/PCs
These can be easily changed to suit you.

Usage

Usage: /usr/local/sbin/btrfs_snap.sh function location                                                                       
You must specify what to snapshot and where it will go.                                                                  
functions: server|PC|clear|list|errors
location: hourly|daily|weekly|monthly|yearly
clear does not need another param, it removes old snaps

Example:
/usr/local/sbin/btrfs_snap.sh PC daily         will initate a snapshot on /home/BACKUP/PCs/ labelled daily
/usr/local/sbin/btrfs_snap.sh server weekly    will initate a snapshot on the server /etc/ and /home/DATA/
/usr/local/sbin/btrfs_snap.sh list monthly     will show all monthly snapshots.
/usr/local/sbin/btrfs_snap.sh errors           list all disk drives error counts

Clear

btrfs_snap.sh clear
will remove all old snaps. Retention times are defined in the clear_snaps () function in the script.

PC snaps

This snaps the copy of PC data files.
PC data files is an rsync of the users PCs.

Monitoring

The script will update a file status_file="/usr/local/backup/status/btrfs" for Nagios monitoring.
Disable is not needed (line 160).
It will also use logger to inject the result of snaps into the logs.

crontab

#  Server snapshots
#  Hourly
0 8,10,12,14,16,18,20 * * * /usr/local/backup/btrfs_snap.sh server hourly
#  Daily
30 23 * * * /usr/local/backup/btrfs_snap.sh server daily
31 23 * * * /usr/local/backup/btrfs_snap.sh PC daily
#  Weekly
35 23 * * 7 /usr/local/backup/btrfs_snap.sh server weekly
36 23 * * 7 /usr/local/backup/btrfs_snap.sh PC weekly
37 23 * * 7 /usr/local/backup/btrfs_snap.sh clear
38 23 * * 7 btrfs scrub start /home/  # advisable weekly volume scrub
#  Monthly
40 23 1 * * /usr/local/backup/btrfs_snap.sh server monthly
41 23 1 * * /usr/local/backup/btrfs_snap.sh PC monthly
#  Yearly
40 23 31 12 * /usr/local/backup/btrfs_snap.sh server yearly
41 23 31 12 * /usr/local/backup/btrfs_snap.sh PC yearly