gistfile1.txt

    
#!/bin/sh

set -e

# --- Configuration ---
# !! IMPORTANT !!: Verify and change this to your target disk.
DISK='/dev/nvme0n1'

# EFI partition size. 1G is generous and safe.
EFI_PART_SIZE='1G'

# ZFS pool name
ZPOOL_NAME='apool'

# ZFS compression algorithm
ZFS_COMPRESSION='zstd-19'

# --- End of Configuration ---

# --- Check for ZFS modules ---
if ! lsmod | grep -q zfs; then
    echo "ZFS modules not loaded. Please ensure you are running the extended version of the Alpine ISO."
    exit 1
fi

# --- Partition the disk ---
echo "--> Partitioning the disk: ${DISK}"
sgdisk --zap-all ${DISK}
sgdisk -n 1:0:+${EFI_PART_SIZE} -t 1:ef00 ${DISK}
sgdisk -n 2:0:0 -t 2:bf00 ${DISK}

# --- Create filesystems ---
echo "--> Creating filesystems"
mkfs.vfat -F32 ${DISK}p1

# --- Create and encrypt the ZFS pool ---
echo "--> Creating encrypted ZFS pool: ${ZPOOL_NAME}"
zpool create \
    -o ashift=12 \
    -o autotrim=on \
    -O acltype=posixacl \
    -O xattr=sa \
    -O dnodesize=auto \
    -O normalization=formD \
    -O relatime=on \
    -O compression=${ZFS_COMPRESSION} \
    -O encryption=aes-256-gcm \
    -O keyformat=passphrase \
    -O keylocation=prompt \
    -R /mnt \
    ${ZPOOL_NAME} ${DISK}p2

# --- Create ZFS datasets ---
echo "--> Creating ZFS datasets"
zfs create -o canmount=off -o mountpoint=none ${ZPOOL_NAME}/ROOT
zfs create -o canmount=noauto -o mountpoint=/ ${ZPOOL_NAME}/ROOT/default
zfs mount ${ZPOOL_NAME}/ROOT/default

zfs create -o canmount=off -o mountpoint=none ${ZPOOL_NAME}/DATA
zfs create ${ZPOOL_NAME}/DATA/home
zfs create -o mountpoint=/var ${ZPOOL_NAME}/DATA/var
zfs create -o mountpoint=/root ${ZPOOL_NAME}/DATA/home/root

# --- Mount the boot partition ---
echo "--> Mounting boot partition"
mkdir -p /mnt/boot
mount ${DISK}p1 /mnt/boot

# --- Install Alpine Linux ---
echo "--> Installing Alpine Linux"
setup-disk -m sys /mnt

# --- Finalizing installation ---
echo "--> Finalizing installation"

# Copy ZFS pool cache
cp /etc/zfs/zpool.cache /mnt/etc/zfs/

# Add ZFS to initramfs
echo "zfs" >> /mnt/etc/mkinitfs/features.d/zfs.features

# Chroot into the new system to configure boot
chroot /mnt /bin/sh <<'EOF'
set -e

# Update initramfs
mkinitfs

# Install bootloader
apk add grub-efi
grub-install --target=x86_64-efi --efi-directory=/boot --bootloader-id=alpine --removable

# Generate grub config
grub-mkconfig -o /boot/grub/grub.cfg

EOF

# --- Unmount and reboot ---
echo "--> Installation complete. Unmounting filesystems."
umount -R /mnt

echo "--> You can now reboot the system."