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# Simple LVM-on-LUKS2 layout -- more or less emulates what one gets out
# of d-i with the "encrypted LVM" partioning method.
# create two new partitions for /boot and LUKS respectively (the first
# one is always used for BIOS/EFI and never exceeds sector 64*1024*2)
sfdisk --append /dev/vda <<-EOF
unit: sectors
start=$((64*1024*2)), size=$((128*1024*2)), type=${GUID_TYPE_Linux_FS}
start=$(((64+128)*1024*2)), type=${GUID_TYPE_LUKS}
EOF
udevadm settle
# initialize a new LUKS partition and open it
echo -n "topsecret" >/rootfs.key
cryptsetup luksFormat --batch-mode \
--key-file=/rootfs.key \
--type=luks2 \
--pbkdf=argon2id \
--pbkdf-force-iterations=4 \
--pbkdf-memory=32 \
-- /dev/vda3
cryptsetup luksOpen --key-file=/rootfs.key --allow-discards \
-- /dev/vda3 "vda3_crypt"
udevadm settle
lvm pvcreate /dev/mapper/vda3_crypt
lvm vgcreate "cryptvg" /dev/mapper/vda3_crypt
lvm lvcreate -Zn --size 1024m --name "swap" "cryptvg"
lvm lvcreate -Zn -l100%FREE --name "root" "cryptvg"
lvm vgchange -ay "cryptvg"
lvm vgmknodes
udevadm settle
mke2fs -Ft ext4 /dev/cryptvg/root
mount -t ext4 /dev/cryptvg/root "$ROOT"
mkdir "$ROOT/boot"
mke2fs -Ft ext2 -m0 /dev/vda2
mount -t ext2 /dev/vda2 "$ROOT/boot"
mkswap /dev/cryptvg/swap
swapon /dev/cryptvg/swap
# vim: set filetype=sh :
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