ZFS Scripts

Scripts to help automate creation, replication and cleanup of zfs snapshots between two systems running ZFS. This should work on Linux, Solaris and FreeBSD.

Scripts

• check_zfs_snapshots.sh

  Nagios check for checking the age of the newest snapshot on one or more zfs filesystems

• cleansnap.sh

  Clean up snapshots

• syncall.sh

  Execute synchronization (replication) on all filesystems that require it

• sync.sh

  Synchronise (replicate) using send + receive over ssh

• sendwithpigz.sh

  Helper script for send.sh - will use pigz and mbuffer to compress/speed up transfer if remotecmd is explicitly set to use this script

• snap.sh

  Create ZFS snapshot for given filesystem

• snapandsync.sh

  Creates ZFS snapshots for a given filesystem, then proceeds to replicate it using sync.sh

Installation

Place the scripts where you want, for example in /usr/local/sbin

Prerequisites (FreeBSD)

• sysutils/coreutils
• shells/bash
• sysutils/pv

Optional: pigz and mbuffer

If mbuffer is installed it will use a 1G buffer to speed up the transfer

pigz allows for parallelizing gzip

Configuration

A couple of custom ZFS properties need to be defined for the script(s) to work.

• dlx.dk.sync:remotecmd
• dlx.dk.sync:remotefs

For example

# zfs set dlx.dk.sync:remotecmd="ssh user@host /sbin/zfs" local/fs
# zfs set dlx.dk.sync:remotefs="remote/fs" local/fs