zfs-rclone

This script is designed to be dumped into /etc/cron.hourly. It uses rclone to backup ZFS datasets with a specific property on a periodic basis.

Prerequisites

• Rclone configured with your desired remote for root (or whatever user you care to run this as).
• Sufficiently modern ZFS that supports user properties
• Modern bash

Configuration

To configure backups for a ZFS dataset, run

zfs set backups:b2:schedule=daily my/dataset/name

Other supported schedule options are hourly, daily, weekly, and monthly.

All other config is handled via vars set at the top of the script:

Variable	Help
PROCESSED_PROPERTY_NAME	ZFS property with timestmap of last successful sync
SCHEDULE_PROPERTY_NAME	ZFS property to read for schedule
RCLONE_OPTIONS	These flags are passed to rclone
RCLONE_REMOTE	Name of already configured remote in rclone
RCLONE_STRATEGY	One of sync, copy, or move; see rclone docs
ZFS_TYPE	One of filesystem, snap, vol, or all
ZPOOL_NAME	Name of the base zpool to find datasets in

Multiple remotes or zpools

If you require backing up to multiple rclone remotes, or from multiple zpools, you can run multiple instances of the script. So long as SCHEDULE_PROPERTY_NAME and PROCESSED_PROPERTY_NAME are distinct for instances running on a zpool, there should be no conflict.

Or, I'd happily welcome a PR to improve this :)