Minimal instructions for installing arch linux on an UEFI NVMe system with full system encryption using dm-crypt and luks

arch-linux-install

# Install ARCH Linux with encrypted file-system and UEFI
# The official installation guide (https://wiki.archlinux.org/index.php/Installation_Guide) contains a more verbose description.

# Download the archiso image from https://www.archlinux.org/
# Copy to a usb-drive
dd if=archlinux.img of=/dev/sdX bs=16M && sync # on linux

# Boot from the usb. If the usb fails to boot, make sure that secure boot is disabled in the BIOS configuration.

# Set swiss-french keymap
loadkeys fr_CH-latin1

# This assumes a wifi only system...
wifi-menu

# Create partitions
cgdisk /dev/nvme0n1
1 512MB EFI partition # Hex code ef00
2 100% size partiton # (to be encrypted) Hex code 8300

# Create EFI partition
mkfs.vfat -F32 /dev/nvme0n1p1

# Setup the encryption of the system with 256 bit effective size
cryptsetup --type luks2 -c aes-xts-plain64 --key-size 512 --hash sha512 --iter-time 3000 -y --use-random luksFormat /dev/nvme0n1p2
cryptsetup luksOpen /dev/nvme0n1p2 luks

# Create encrypted partitions
# This creates one partions for root, modify if /home or other partitions should be on separate partitions
pvcreate /dev/mapper/luks
vgcreate vg0 /dev/mapper/luks
lvcreate --size 16G vg0 --name swap
lvcreate -l +100%FREE vg0 --name root

# Create filesystems on encrypted partitions
mkfs.ext4 /dev/mapper/vg0-root
mkswap /dev/mapper/vg0-swap

# Mount the new system 
mount /dev/mapper/vg0-root /mnt # /mnt is the installed system
swapon /dev/mapper/vg0-swap # Not needed but a good thing to test
mkdir /mnt/boot
mount /dev/nvme0n1p1 /mnt/boot

# Install the system also includes stuff needed for starting wifi when first booting into the newly installed system
# Unless vim and zsh are desired these can be removed from the command. Dialog is needed by wifi-menu.
pacstrap /mnt base linux linux-firmware lvm2 zsh vim git sudo efibootmgr dialog wpa_supplicant

#install man pages : pacman -S man

# 'install' fstab
genfstab -pU /mnt >> /mnt/etc/fstab
# Make /tmp a ramdisk (add the following line to /mnt/etc/fstab)
tmpfs	/tmp	tmpfs	defaults,noatime,mode=1777	0	0
# Change relatime on all non-boot partitions to noatime (reduces wear if using an SSD)

# Enter the new system
arch-chroot /mnt /bin/bash

# Setup system clock
ln -s /usr/share/zoneinfo/Europe/Zurich /etc/localtime
hwclock --systohc --utc

# Set the hostname
echo MYHOSTNAME > /etc/hostname

# Generate locale
#Uncomment wanted locales in /etc/locale.gen
vim /etc/locale.gen
locale-gen
localectl set-locale LANG=en_US.UTF-8

#To avoid problems with gnome-terminal set locale system wide
#Do NOT set LC_ALL=C. It overrides all the locale vars and messes up special characters
#Pay attention to the UTF-8. Capital letters !
echo LANG=en_US.UTF-8 >> /etc/locale.conf
echo LC_ALL= >> /etc/locale.conf


# Set password for root
passwd

# Add real user remove -s flag if you don't whish to use zsh
# useradd -m -g users -G wheel,storage,power -s /bin/zsh MYUSERNAME
# passwd MYUSERNAME

# Configure mkinitcpio with modules needed for the initrd image
vim /etc/mkinitcpio.conf
# Add 'ext4' to MODULES
# Add 'encrypt' and 'lvm2' to HOOKS before filesystems
# Add 'resume' after 'lvm2' (also has to be after 'udev')

# Regenerate initrd image
mkinitcpio -p linux

# Setup systembootd (Lighter than Grub)
bootctl --path=/boot install

# Create loader.conf
echo 'default arch' >> /boot/loader/loader.conf
echo 'timeout 5' >> /boot/loader/loader.conf

# Create arch.conf (or XYZ.conf for default XYZ in loader.conf)
vim /boot/loader/entries/arch.conf

# Add the following content to arch.conf
# <UUID> is the the one of the raw encrypted device (/dev/nvme0n1p2). It can be found with the 'blkid' command
title Arch Linux
linux /vmlinuz-linux
initrd /initramfs-linux.img
options cryptdevice=UUID=<UUID>:vg0 root=/dev/mapper/vg0-root resume=/dev/mapper/vg0-swap rw intel_pstate=no_hwp

# Exit new system and go into the cd shell
exit

# Unmount all partitions
umount -R /mnt
swapoff -a

# Reboot into the new system, don't forget to remove the cd/usb
reboot

Thanks, great work.
I ran into a problem though. When booting, I see running early hook [udev] then lvm2 then running hook [encrypt] and the the system waits 10 seconds for my root partition, then running hook [resume] and then another 10 seconds for the swap before saying that hibernation device (swap) is not found, then the root device is not found and it drops me in a recovery shell.
I thought it would ask for my password and decrypt the partition before starting looking for lvm volumes. Any idea?
Edit: into that recovery shell, if I do cryptsetup luksOpen /dev/nvme0n1p2 and enter my password then I can boot.

UUID was messed up! I fixed it and now it properly asks for password and boots fine.

stuck on using GRUB with a NVMe SSD, trying and see if this gist works

Awesome! Worked for me. Lenovo A475 AMD

The Grub bootloader supports LVM on LUKS on NVMe in the latest versions of ArchLinux, so that systemd-boot is no longer required. This also enables support for encrypted boot partitions and Secure Boot. I posted condensed instructions here: https://gist.github.com/gmpreussner/2965fd1b388113a0b33b32a4641a2221

A more detailed tutorial can be found here: https://headcrash.industries/reference/fully-encrypted-archlinux-with-secure-boot-on-yoga-920/

thanks for the hint @gmpreussner !

Great contribution, thank you very much!