Scripts to install Debian 12 or Ubuntu 22 LTS with ZFS root on Hetzner servers (virtual and dedicated).
WARNING: all data on the disk will be destroyed.

• Login into Hetzner cloud server console.
• Choose "rescue" menu.
• Click "enable rescue and power cycle", add SSH key to the rescue console, set it OS to linux64, then press mount rescue and power cycle" button.
• connect via SSH to rescue console, and run the script from this repo.

Debian 12 minimal setup with SSH server

wget -qO- https://raw.githubusercontent.com/hw-rjuzak/zfs-hetzner-vm/master/hetzner-debian12-zfs-setup.sh | bash -

Ubuntu 22 LTS minimal setup with SSH server

wget -qO- https://raw.githubusercontent.com/hw-rjuzak/zfs-hetzner-vm/master/hetzner-ubuntu22-zfs-setup.sh | bash -

Answer script questions about desired hostname and ZFS ARC cache size.

To cope with network failures its higly recommended to run the commands above inside screen console, type man screen for more info. Example of screen utility usage:

export LC_ALL=en_US.UTF-8 && screen -S zfs

To detach from screen console, hit Ctrl-d then a To reattach, type screen -r zfs

Upon succesfull run, the script will reboot system, and you will be able to login into it, using the same SSH key you have used within rescue console

Please note that the drives you intend to format can not be in use, you can execute mdadm --stop --scan before running the script to halt default software raid operations.