An alternative implementation of the zfs-auto-snapshot service for Linux that is compatible with ZFS on Linux.
My fork removes the automatic installation of cron entries that do things the user may not desire. This fork only installs the script and leaves manual crontab/systemd-timer configuration up to the user.
This program is a posixly correct bourne shell script. It depends only on the zfs utilities, and can run in the dash shell.
git clone https://github.com/ajhaydock/zfs-auto-snapshot.git
cd zfs-auto-snapshot
sudo make install
I recommend scheduling this using systemd timers.
You can find some example .timer files in the timers/ directory of this repo. They will be installed when you run make install.
You can enable the timers as follows:
sudo systemctl daemon-reload
sudo systemctl start zfs-auto-hourly.timer && sudo systemctl enable zfs-auto-hourly.timer
sudo systemctl start zfs-auto-daily.timer && sudo systemctl enable zfs-auto-daily.timer
sudo systemctl start zfs-auto-weekly.timer && sudo systemctl enable zfs-auto-weekly.timer
If you wish to edit the timers, you will find them in the /etc/systemd/system/ directory.
By default, the script will snapshot all pools automatically, unless they have the com.sun:auto-snapshot property set to false.
To check the status of this property for all of your pools and datasets, run the following command:
sudo zfs get com.sun:auto-snapshot
If you see an output like the following, then snapshots are enabled on this pool:
NAME PROPERTY VALUE SOURCE
archive com.sun:auto-snapshot - -
To disable snapshots on this pool, issue the following command:
sudo zfs set com.sun:auto-snapshot=false archive
We can check with zfs get again, and this time our output should look like the following. If we see this, we know that snapshots have been disabled on this pool:
NAME PROPERTY VALUE SOURCE
archive com.sun:auto-snapshot false local
To disable snapshots on a single dataset, the command is very similar:
sudo zfs set com.sun:auto-snapshot=false archive/dataset