Arch installer

install-arch.sh

#!/bin/bash

DRIVE=/dev/xvda
MOUNT_OPTS=defaults,x-mount.mkdir,compress=lzo,ssd,noatime

# Set up partitions
sgdisk --clear \
  --new=1:0:+512MiB --typecode=1:ef00 --change-name=1:EFI \
  --new=2:0:0 --typecode=2:8300 --change-name=2:system \
  $DRIVE
  
# Wait until labels are available
sleep 5

mkfs.fat -F32 -n EFI /dev/disk/by-partlabel/EFI
mkfs.btrfs --force --label system /dev/disk/by-partlabel/system

# Set up subvolumes
mount -t btrfs LABEL=system /mnt
btrfs subvolume create /mnt/root
btrfs subvolume create /mnt/home
btrfs subvolume create /mnt/snapshots
umount -R /mnt

# Mount
mount -t btrfs -o subvol=root,$MOUNT_OPTS LABEL=system /mnt
mount -t btrfs -o subvol=home,$MOUNT_OPTS LABEL=system /mnt/home
mount -t btrfs -o subvol=snapshots,$MOUNT_OPTS LABEL=system /mnt/.snapshots
mkdir /mnt/boot
mount LABEL=EFI /mnt/boot

# Install
pacstrap /mnt base linux linux-firmware vim
genfstab -L -p /mnt >> /mnt/etc/fstab

# Generate locale
arch-chroot /mnt <<EOF
echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen
locale-gen
EOF

# Run systemd-firstboot
systemd-firstboot \
  --welcome=no \
  --force \
  --root=/mnt \
  --locale=en_US.UTF-8 \
  --timezone=Europe/Oslo \
  --prompt-hostname \
  --prompt-root-password
  
# Enable ntp
arch-chroot /mnt <<EOF
timedatectl set-ntp true
EOF

# Set up bootloader
arch-chroot /mnt <<EOF
bootctl install
EOF

cat <<EOF > /mnt/boot/loader/loader.conf
default arch.conf
EOF

cat <<EOF > /mnt/boot/loader/entries/arch.conf
title Arch Linux
linux /vmlinuz-linux
initrd  /initramfs-linux.img
options root="LABEL=system" rootflags=subvol=root
EOF

# Set up networking
arch-chroot /mnt <<EOF
systemctl enable systemd-networkd
systemctl enable systemd-resolved
EOF

rm /mnt/etc/resolve.conf
ln -sf /run/systemd/resolve/stub-resolv.conf /mnt/etc/resolv.conf

cat <<EOF > /mnt/etc/systemd/network/wired.network
[Match]
Name=eth0

[Network]
DHCP=yes
EOF

# Cleanup
umount -R /mnt