Tomster/Arch-Setup-Script
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Setting up Arch Linux with BTRFS, snapshots and full disk encryption including /boot (UEFI only).
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README.md

Introduction

This is my fork of easy-arch, a script made in order to boostrap a basic Arch Linux environment with snapshots and encryption by using a fully automated process.

How does it work?

  1. Download an Arch Linux ISO from here
  2. Flash the ISO onto an USB Flash Drive.
  3. Boot the live environment.
  4. Connect to the internet.
  5. git clone https://github.com/tommytran732/Arch-Setup-Script/edit/main/README.md
  6. cd Arch-Setup-Script
  7. chmod u+x ./install.sh && ./install.sh

Changes to the original project

  1. Enabled AppArmor
  2. Removed swap partition (I will add zram auto config later)
  3. Replaced Snapper with Timeshift (snapper rollback only works nicely with openSUSE's layout and openSUSE's GRUB. Since the current layout works better with Timeshift and we don't have any GRUB package with SUSE's patches on the AUR, I opt in for Timeshift instead.
  4. The entire /var, not /var/log is in its own subvolume. There are more things that should not be included and restore with the main system, such as docker containers and virtual machines.
  5. No @snapshot subvolume, since we are setting this up to use with Timeshift.
  6. Default umask to 077
  7. Firewalld is enabled by default
  8. Improved kernel settings for better security

Partitions layout

Partition Number Label Size Mountpoint Filesystem
1 ESP 300 MiB /boot/efi FAT32
2 cryptroot Rest of the disk / Encrypted BTRFS (LUKS1)

The partitions layout is pretty straightforward, it's inspired by this section of the Arch Wiki. As you can see there's just a couple of partitions:

  1. A FAT32, 512MiB sized, mounted at /boot/efi for the ESP.
  2. A LUKS encrypted container, which takes the rest of the disk space, mounted at / for the rootfs.
  3. /boot is encrypted.

BTRFS subvolumes layout

Subvolume Number Subvolume Name Mountpoint
1 @ /
2 @boot /boot
3 @home /home
4 @var /var

The BTRFS subvolumes layout follows the traditional and suggested layout used by Snapper, you can find it here. Here's a brief explanation of the BTRFS layout I chose:

  1. @ mounted as /.
  2. @boot mounted as /boot.
  3. @home mounted as /home.
  4. @var mounted as /var.