ZFSRoot installation over a dm-crypt volume for Arch Linux (UEFI)

Arch-ZFSRoot-on-dm-crypt-UEFI

# arch uefi dm-crypt zfsroot install (archiso)
# modified to work with current repos as of 2016-06-16 and with hints from
# comments by larskotthoff

# uses only one boot partition for EFI and initramfs


# partition disk
# start at 1MB (sector 2048)
512Mib EFI
Rest ZFS

(parted) mklabel gpt
(parted) mkpart ESP fat32 1MiB 513MiB
(parted) set 1 boot on
(parted) mkpart primary ext2 513MiB 99%

#setup encrypted partition
cryptsetup luksFormat  /dev/disk/by-uuid/<uid>
cryptsetup luksOpen /dev/disk/by-uuid/<uid> cryptroot

# set architecture to x86_64
# and
# add unofficial archzfs repo
# edit /etc/pacman.conf
Architecture = x86_64

[archzfs]
Server = http://archzfs.com/$repo/$arch

# add keys for archzfs repo
pacman-key -r 0ee7a126
pacman-key --lsign-key 0ee7a126

# edit /etc/pacman.d/mirrorlist to get only your nearest mirrors

# setup networking
# for wifi:
wifi-menu

# set nameserver
# edit /etc/resolve.conf
nameserver <ip>

# update package index
pacman -Syy

# install archzfs
# default: all
pacman -S archzfs-archiso-linux

modprobe zfs

# zfs setup
touch /etc/zfs/zpool.cache

#setup ZFS (ashift for modern drives, ssd)
# -o ashift=12 when using a 4k device
zpool create -o cachefile=/etc/zfs/zpool.cache -m none -R /mnt zroot /dev/mapper/cryptroot

zfs create -o mountpoint=none -o compression=lz4 zroot/ROOT

#rootfs 
# DONT'T CREATE extra /usr on arch, see here:
#  - http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken/
#  - https://wiki.archlinux.org/index.php/Mkinitcpio
zfs create -o mountpoint=/ zroot/ROOT/default
zfs create -o mountpoint=/opt zroot/opt

#homedirs
zfs create -o mountpoint=/home zroot/home
zfs create -o mountpoint=/root zroot/home/root

zpool set bootfs=zroot zroot

# export and reimport pool, so you don't need to force next import
zpool export zroot
zpool import -R /mnt zroot

# mount boot partition
mkdir /mnt/boot
mount /dev/disk/by-uuid/<uid> /mnt/boot

# install base system
pacstrap -i /mnt base base-devel

# create fstab
genfstab -U -p /mnt | grep boot >> /mnt/etc/fstab

# chroot into installation
arch-chroot /mnt /bin/bash

# set locale
# edit /etc/locale.gen
en_US.UTF-8 UTF-8
# or
en_IE.UTF-8 UTF-8

# generate locale
locale-gen

# set default language
echo LANG=en_US.UTF-8 > /etc/locale.conf
# or
echo LANG=en_IE.UTF-8 > /etc/locale.conf

# set timezone
ln -s /usr/share/zoneinfo/Europe/Vienna /etc/localtime

# set hardware clock
hwclock --systohc --utc

# install ntp
pacman -S ntp

# add country pools to conf
# nano /etc/ntp.conf

# sync time
ntpd -q

# save to hardware clock
hwclock -w

# set keymap and font
loadkeys us
setfont Lat2-Terminus16

# save keymap and font
# edit /etc/vconsole.conf
KEYMAP=us
FONT=Lat2-Terminus16

# set architecture to x86_64
# and
# add unofficial archzfs repo
# edit /etc/pacman.conf
Architecture = x86_64

[archzfs]
Server = http://archzfs.com/$repo/$arch

# add keys for archzfs repo
pacman-key -r 0ee7a126
pacman-key --lsign-key 0ee7a126

# edit /etc/pacman.d/mirrorlist

# update package database
pacman -Syy
pacman -Su --ignore filesystem,bash
pacman -S bash
pacman -Su

# install other needed packages
pacman -S gnupg vim zfs-linux, tmux, rsync

# enable zfs automount
systemctl enable zfs.target

# add hooks for initramfs
# edit /etc/mkinitcpio.conf
#
# HOOKS=... keyboard before encrypt before zfs before filesystems. No fsck.
HOOKS="base udev autodetect modconf block keyboard encrypt zfs filesystems"

# make initramfs
mkinitcpio -p linux

# set root password
passwd

# set hostname
echo <name> > /etc/hostname


# EFISTUB refind
#

# install refind
pacman -S refind-efi

# create refind directories
mkdir -p /boot/EFI/refind/{drivers,icons}

# copy default files
cp /usr/share/refind/refind_<arch>.efi /boot/EFI/refind/
cp /usr/share/refind/refind.conf-sample /boot/EFI/refind/refind.conf
cp /usr/share/refind/drivers/* /boot/EFI/refind/drivers/
cp /usr/share/refind/icons/* /boot/EFI/refind/icons/
cp /usr/share/refind/config/refind_linux.conf-sample /boot/refind_linux.conf

# edit /boot/refind_linux.conf
"Boot with defaults" "cryptdevice=/dev/disk/by-uuid/<uuid>:cryptoroot zfs=zroot/ROOT/default rw"

# add refind to efi
modprobe efivars
efibootmgr -c -d /dev/disk/by-id/<id> -p <efi_partition_nr> -l /EFI/refind/refind_<arch>.efi -L "rEFInd"
# if a no space error appears, tryo to delete dump files in /sys/firmware/efi/efivars

# install any software, for wifi: iw, wpa_supplicant, dialog

# exit chroot

# copy zpool.cache to chroot
# cp /etc/zfs/zpool.cache /mnt/etc/zfs/

# umount /boot and /boot/efi
umount /mnt/boot/efi
umount /mnt/boot

# export zfs
zpool export zroot

# reboot

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