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debian-stretch-zfs-root

Installs Debian GNU/Linux 9 Stretch to a native ZFS root filesystem using a Debian Stretch Live CD. The resulting system is a fully updateable debian system with no quirks or workarounds.

Usage

  1. Boot Stretch Live CD ('standard' edition)
  2. Login (user: user, password: live) and become root
  3. Setup network and export http_proxy environment variable (if needed)
  4. Run this script
  5. User interface: Select disks and RAID level
  6. Let the installer do the work
  7. User interface: install grub to all disks participating in the array
  8. User interface: enter root password and select timezone
  9. Reboot

Fixes included

  • grub (v2.02, included in Debian 9), especially grub-probe, does not support all ZFS features and subsequently refuses to install. This script disables feature@hole_birth and feature@embedded_data (and you must not enable those features after installation).
  • Some mountpoints, notably /var, need to be mounted via fstab as the ZFS mount script runs too late during boot.
  • The EFI System Partition (ESP) is a single point of failure on one disk, this is arguably a mis-design in the UEFI specification. This script installs an ESP partition to every RAID disk, accompanied with a corresponding EFI boot menu.

Bugs

  • During installation you might encounter some SPL package errors (Please make sure the kmod spl devel package is installed) which can be ignored safely.
  • grub-install mysteriously fails for disk numbers >= 4 (grub-install: error: cannot find a GRUB drive for /dev/disk/by-id/...).

Credits