sporkus

Exposing zfs snapshot to windows previous version using samba vfs_shadow_copy2

This was much trickier than I had originally anticipated and have spent a few hours testing.

The config from samba wiki absolutely works, but it wasn't ranked higher in search engine and it's not general enough. https://github.com/zfsonlinux/zfs-auto-snapshot/wiki/Samba

Tested on ubuntu 22.04LTS, samba 4.15.9 and windows 11.

TLDR

Mikesco3

Usage

1. On system that should be backed up

create a user called zfsbackup

useradd zfsbackup --create-home --system
mkdir -p /home/zfsbackup/{.ssh,.local/bin}
chown zfsbackup:zfsbackup /home/zfsbackup --recursive

add a restricted list of commands allowed by this user

csarn

Usage

on system that should be backed up

• put "restrict_commands.sh" in /usr/local/bin and make it executable
• install ts, lzop and optionally mbuffer

useradd zfsbackup --create-home --system
mkdir /home/zfsbackup/.ssh
zfs allow -u zfsbackup send,hold tank/dataset
echo 'restrict,command="restrict_commands.sh" ssh-ed25519 ...' > /home/zfsbackup/.ssh/authorized_keys