ZFS snapshot on client

client
1

During installation of the URbackup client on Linux, it asks if the user wants to setup a snapshot feature using LVM or BTRFS (if the corresponding FS is detected).

Seeing as how on the client side, this is only used to create a temporary snapshot to ensure a consistent file state during backups, would it be possible to also implement this for clients that use ZFS?

2

Yeah, one can probably adapt the script btrfs_create_filesystem_snapshot pretty easily.

3

For anyone who wants it, here is my amateurish script for zfs client snapshots adapted from the btrfs scripts, feel free to improve it!

zfs_create_filesystem_snapshot

#!/bin/bash

set -e

SNAP_ID=$1
SNAP_MOUNTPOINT="$2"
SNAP_NAME="$3"
SNAP_ORIG_PATH="$4"


TYPE=$(df -T -P | egrep " ${SNAP_MOUNTPOINT}\$" | head -n 1 | tr -s " " | cut -d" " -f2)



if [[ $TYPE == "zfs" ]]
then
        ZPOOL=`zpool list -H -o name`
        ZVOL=`df -P | egrep " ${SNAP_MOUNTPOINT}\$" | cut -d" " -f1`
        zfs snapshot ${ZVOL}@${SNAP_ID}
else
        echo "Cannot create snapshot of file system with type $TYPE"
        exit 1
fi

echo "SNAPSHOT=${SNAP_MOUNTPOINT}/.zfs/snapshot/${SNAP_ID}"

exit 0

zfs_remove_file_system_snapshot

#!/bin/bash

set -e

SNAP_ID=$1
SNAP_MOUNTPOINT="$2"
SNAP_NAME="$3"
SNAP_DEST="$4"
SNAP_ORIG_PATH="$5"





TYPE=$(df -T -P | egrep " ${SNAP_MOUNTPOINT}\$" | tr -s " " | cut -d" " -f2)

        ZVOL=`cd $SNAP_MOUNTPOINT/ ; df -T -P | egrep " ${SNAP_MOUNTPOINT}\$" | cut -d" " -f1`
        ZVOL=`zfs list -t snapshot | egrep "${SNAP_ID}" | cut -d" " -f1`
        zfs destroy $ZVOL




exit 0
2 Likes
4

Fixed a bug in the removal script and changed a few things.
Works ok on my end.

5

Good day!
How can these scripts be adapted to the freebsd client? Tried including using bash, but fails…

6

Helpful, Working fine.

7

Hello,

I made these scripts and put them in /usr/local/share/urbackup
Also I edited snapshot.cfg with the paths to these scripts

When I run a file backup, I receive this error:

Errores
	
15/06/22 18:51
	Creating snapshot of "/RAID1/urbackup" failed
Errores
	
15/06/22 18:51
	sh: 1: /usr/local/share/urbackup/zfs_create_filesystem_snapshot: not found
Errores
	
15/06/22 18:51
	Creating snapshot of "urbackupdb" failed.

What could be the problem?
Thanks

It would be nice to include these scripts in default urbackup client install.

8

Sorry, It is solved.
It seems that works fine!