mksnapback

mksnapback is an RC script for FreeBSD. During system boot, it'll snapshot a given filesystem if a snapshot hasn't been taken for a configurable amount of time. When the system shuts down, the script will delete any snapshots that are older than a certain time.

Installation

1. Download mksnapback
2. Move it to /usr/local/etc/rc.d
3. Make it executable
4. Add mksnapback_enable="YES" to /etc/rc.conf.

You may add the following variables to /etc/rc.conf:

• mksnapback_directory denotes the directory where snapshots are placed (and implicitly the filesystem to snapshot). Snapshots are named like YYYYMMDD, thus if mksnapback_directory is set to /backup/.snap, you will get snapshots like /backup/.snap/20150604 and so on
• mksnapback_delete_after defaults to 1 month. Snapshots older than this will be deleted during system shutdown (refer to date(1) for valid time expressions)
• mksnapback_create_after defaults to 1 week. A new snapshot will be taken during system boot if no one has been created for this period of time.