sh/bash/rescue-hetzner.sh

rescue_wipe_0_init_hetzner_8_8() {
	local device
	local devices=(
		'/dev/sda'
		'/dev/sdb'
	)
	local members
	local number
	local passphrase
	local unit='mib'
	# read passphrase
	passphrase="$(read_passphrase)"
	#
	lsblk
	echo -n 'WIPE' "${devices[@]}" '/?\ OR CANCEL /!\'
	read
	#
	number=0
	for device in "${devices[@]}"; do
		((number++))
		echo
		echo "#${number}: ${device}"
		#
		parted "${device}" \
			--script \
			mktable gpt
		#
		parted "${device}" \
			unit "${unit}" \
			mkpart "crypt-${number}" 33282 7630885
		#
		parted "${device}" \
			unit "${unit}" \
			mkpart "boot-${number}" 514 33282
		#
		parted "${device}" \
			unit "${unit}" \
			mkpart "esp-${number}" 2 514
		parted "${device}" \
			set 3 esp on
		#
		parted "${device}" \
			unit "${unit}" \
			mkpart "bios-${number}" 1 2
		parted "${device}" \
			set 4 bios_grub on
	done
	#
	number=0
	for device in "${devices[@]}"; do
		((number++))
		echo
		echo "#${number}: ${device}4"
		# wipe bios
		dd \
			if='/dev/zero' of="${device}4"
	done
	#
	number=0
	for device in "${devices[@]}"; do
		((number++))
		echo
		echo "#${number}: ${device}3"
		# format esp
		dd \
			if='/dev/zero' of="${device}3" bs='1M'
		mkfs.vfat \
			-F 32 \
			-S 4096 \
			-i "0000000${number}" \
			-n "esp-${number}" \
			"${device}3"
		# mount esp
		mkdir --parents "/media/esp/${number}"
		mount "${device}3" "/media/esp/${number}"
	done
	#
	number=0
	for device in "${devices[@]}"; do
		((number++))
		echo
		echo "#${number}: ${device}2"
		# wipe boot
		dd status='progress' \
			if='/dev/zero' of="${device}2" bs='1G' count=1
	done
	#
	members=()
	for device in "${devices[@]}"; do
		members+=("${device}2")
	done
	mdadm \
		--create '/dev/md/boot' \
		--level 0 \
		--metadata 1 \
		--name 'md:boot' \
		--raid-devices ${#devices[@]} \
		--uuid '00000000:00000000:00000000:00000002' \
		"${members[@]}"
	#
	mkfs.btrfs --force \
		--checksum 'sha256' \
		--label 'boot' \
		--uuid '00000000-0000-0000-0000-00000000000b' \
		'/dev/md/boot'
	# mount boot
	mkdir --parents '/media/boot'
	mount \
		--options 'autodefrag,compress-force=zstd' \
		'/dev/md/boot' '/media/boot'
	#
	number=0
	for device in "${devices[@]}"; do
		((number++))
		echo
		echo "#${number}: ${device}1"
		# wipe crypt head
		dd status='progress' \
			if='/dev/zero' of="${device}1" bs='1G' count=1
	done
	#
	members=()
	for device in "${devices[@]}"; do
		members+=("${device}1")
	done
	mdadm \
		--create '/dev/md/crypt' \
		--level 0 \
		--metadata 1 \
		--name 'md:crypt' \
		--raid-devices ${#devices[@]} \
		--uuid '00000000:00000000:00000000:00000001' \
		"${members[@]}"
	# encrypt
	echo "${passphrase}" |
		cryptsetup \
			--verbose \
			--batch-mode \
			--type 'luks2' \
			--pbkdf 'argon2id' \
			--cipher 'aes-xts-plain64' \
			--iter-time 8192 \
			--key-size 512 \
			--hash 'sha512' \
			--use-random \
			luksFormat \
			'/dev/md/crypt'
	# open
	echo "${passphrase}" |
		cryptsetup luksOpen '/dev/md/crypt' 'crypt'
	# passphrase
	unset passphrase
}

rescue_wipe_2_make_hetzner_8_8() {
	local passphrase
	# close
	cryptsetup luksClose 'crypt'
	# read passphrase
	passphrase="$(read_passphrase)"
	# encrypt
	echo "${passphrase}" |
		cryptsetup \
			--verbose \
			--batch-mode \
			--type 'luks2' \
			--pbkdf 'argon2id' \
			--cipher 'aes-xts-plain64' \
			--iter-time 8192 \
			--key-size 512 \
			--hash 'sha512' \
			--use-random \
			luksFormat \
			'/dev/md/crypt'
	# open
	echo "${passphrase}" |
		cryptsetup luksOpen '/dev/md/crypt' 'crypt'
	# passphrase
	unset passphrase
	# format crypt
	mkfs.btrfs --force \
		--checksum 'sha256' \
		--label 'crypt' \
		--uuid '00000000-0000-0000-0000-00000000000c' \
		'/dev/mapper/crypt'
	# mount crypt
	mkdir --parents '/media/crypt'
	mount \
		--options 'autodefrag,compress-force=zstd' \
		'/dev/mapper/crypt' '/media/crypt'
	# make swap file
	btrfs filesystem mkswapfile \
		--size '64g' \
		--uuid '00000000-0000-0000-0000-000000000005' \
		'/media/crypt/swap'
}