From 10db57cf85a99152e57b409dfae30505bc210d25 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Simon=20Sp=C3=B6hel?= <simon@spoehel.ch>
Date: Wed, 7 Apr 2021 08:27:25 +0200
Subject: Adding basic functionality to create VM images using debconf.

---
 share/build-scripts/qemu | 240 +++++++++++++++++++++++------------------------
 1 file changed, 118 insertions(+), 122 deletions(-)

(limited to 'share/build-scripts/qemu')

diff --git a/share/build-scripts/qemu b/share/build-scripts/qemu
index 28c5262..3bfa046 100755
--- a/share/build-scripts/qemu
+++ b/share/build-scripts/qemu
@@ -1,6 +1,7 @@
 #!/bin/sh
 
 # Copyright (C) 2014-2021 Daniel Baumann <daniel.baumann@open-infrastructure.net>
+#               2021 Simon Spöhel <simon.spoehel@open-infrastructure.net>
 #
 # SPDX-License-Identifier: GPL-3.0+
 #
@@ -35,7 +36,7 @@ Parameters ()
 	GETOPT_LONGOPTIONS="bind:,bind-ro:,script:,name:,preseed-file:"
 	GETOPT_OPTIONS="b:,s:,n:,p:"
 
-	PARAMETERS="$(getopt --longoptions ${GETOPT_LONGOPTIONS} --name=${SCRIPT} --options ${GETOPT_OPTIONS} --shell sh -- ${@})"
+	PARAMETERS="$(getopt --longoptions ${GETOPT_LONGOPTIONS} --name=${SCRIPT} --options ${GETOPT_OPTIONS} --shell sh -- "${@}")"
 
 	if [ "${?}" != "0" ]
 	then
@@ -127,137 +128,73 @@ then
 	exit 1
 fi
 
-Mount ()
+Create_Disk ()
 {
-	# Mounting rw bind mounts
-	if [ -n "${BIND}" ]
-	then
-		BINDS="$(echo ${BIND} | sed -e 's|;| |g')"
+	# FIXME image size as arg or preseed
+	IMG_SIZE=12000
+	#BOOT_METHOD="bios"
+	BOOT_METHOD="efi"
+
+	dd if=/dev/zero of="${MACHINES}/${NAME}.img" bs=1024k count=0 seek="${IMG_SIZE}"
+	parted "${MACHINES}/${NAME}.img" mklabel gpt
+
+
+	case "${BOOT_METHOD}" in
+		bios)
+			# FIXME number partitions and size scrip and everything
+			parted -a optimal "${MACHINES}/${NAME}.img" mkpart BIOS-BOOT 1MB 2MB
+			parted "${MACHINES}/${NAME}.img" set 1 bios_grub on
+			parted -a optimal "${MACHINES}/${NAME}.img" mkpart SYSTEM 2MB 100%
+			SYSTEM_PARTITION="p2"
+			;;
 
-		for ENTRY in ${BINDS}
-		do
-			SOURCE="$(echo ${ENTRY} | awk -F: '{ print $1 }')"
-			TARGET="$(echo ${ENTRY} | awk -F: '{ print $2 }')"
+		efi)
+			parted -a optimal "${MACHINES}/${NAME}.img" mkpart EFI fat32 1M 1000M
+			parted "${MACHINES}/${NAME}.img" set 1 esp on
+			parted -a optimal "${MACHINES}/${NAME}.img" mkpart SYSTEM 1000MB 100%
+			EFI_PARTITION="p1"
+			SYSTEM_PARTITION="p2"
+			;;
 
-			mkdir -p "${SOURCE}"
-			mkdir -p "${MACHINES}/${NAME}/${TARGET}"
+		*)
+			echo "Error, unrecognized BOOT_METHOD" >&2
+			exit 1
+	esac
 
-			mount -o bind "${SOURCE}" "${MACHINES}/${NAME}/${TARGET}"
-		done
-	fi
+	kpartx -av "${MACHINES}/${NAME}.img"
+	# FIXME loop number hardcoded
+	mkfs.ext4 "/dev/mapper/loop0${SYSTEM_PARTITION}"
 
-	# Mounting ro bind mounts
-	if [ -n "${BIND_RO}" ]
+	if [ ! -z "${EFI_PARTITION}" ]
 	then
-		BINDS_RO="$(echo ${BIND_RO} | sed -e 's|;| |g')"
-
-		for ENTRY in ${BINDS_RO}
-		do
-			SOURCE="$(echo ${ENTRY} | awk -F: '{ print $1 }')"
-			TARGET="$(echo ${ENTRY} | awk -F: '{ print $2 }')"
-
-			mkdir -p "${SOURCE}"
-			mkdir -p "${MACHINES}/${NAME}/${TARGET}"
-
-			mount -o rbind "${SOURCE}" "${MACHINES}/${NAME}/${TARGET}"
-		done
+		mkfs.vfat -F 32 "/dev/mapper/loop0${EFI_PARTITION}"
 	fi
 
-	# Mounting overlay mounts
-	if [ -n "${CNT_OVERLAY}" ]
-	then
-		CNT_OVERLAYS="$(echo ${CNT_OVERLAY} | sed -e 's|;| |g')"
-
-		COUNT="0"
-		for CNT_OVERLAY in ${CNT_OVERLAYS}
-		do
-			DIRECTORY_LOWER="$(echo ${CNT_OVERLAY} | awk -F: '{ print $1 }')"
-			DIRECTORY_UPPER="$(echo ${CNT_OVERLAY} | awk -F: '{ print $2 }')"
-			DIRECTORY_WORK="$(echo ${CNT_OVERLAY} | awk -F: '{ print $3 }')"
-			DIRECTORY_MERGED="$(echo ${CNT_OVERLAY} | awk -F: '{ print $4 }')"
-
-			COUNT="$((${COUNT} + 1))"
-			CNT_OVERLAY_OPTION="$(echo ${CNT_OVERLAY_OPTIONS} | awk -F ';' "{ print \$${COUNT} }")"
-
-			for DIRECTORY in "${DIRECTORY_LOWER}" "${DIRECTORY_UPPER}" "${DIRECTORY_WORK}" "${DIRECTORY_MERGED}"
-			do
-				mkdir -p "${DIRECTORY}"
-			done
+	# FIXME swap, more discs
+}
 
-			if ! findmnt -n -o SOURCE "${DIRECTORY_MERGED}" | grep -qs '^overlay-'
-			then
-				if [ -n "${CNT_OVERLAY_OPTION}" ]
-				then
-					CNT_OVERLAY_OPTION="-o ${CNT_OVERLAY_OPTION}"
-				fi
+Mount_Disk ()
+{
+	# FIXME probably not necessary
+	mkdir -p "${MACHINES}/${NAME}"
 
-				mount -t overlay overlay-${NAME} ${CNT_OVERLAY_OPTION} -olowerdir="${DIRECTORY_LOWER}",upperdir="${DIRECTORY_UPPER}",workdir="${DIRECTORY_WORK}" "${DIRECTORY_MERGED}"
-			fi
-		done
-	fi
+	# FIXME partition number hardcoded
+	mount "/dev/mapper/loop0${SYSTEM_PARTITION}" "${MACHINES}/${NAME}"
 }
 
 Umount ()
 {
-	# Unmounting overlay mounts
-	if [ -n "${CNT_OVERLAY}" ]
-	then
-		CNT_OVERLAYS="$(echo ${CNT_OVERLAY} | sed -e 's|;| |g')"
-
-		for CNT_OVERLAY in ${CNT_OVERLAYS}
-		do
-			DIRECTORY_LOWER="$(echo ${CNT_OVERLAY} | awk -F: '{ print $1 }')"
-			DIRECTORY_UPPER="$(echo ${CNT_OVERLAY} | awk -F: '{ print $2 }')"
-			DIRECTORY_WORK="$(echo ${CNT_OVERLAY} | awk -F: '{ print $3 }')"
-			DIRECTORY_MERGED="$(echo ${CNT_OVERLAY} | awk -F: '{ print $4 }')"
-
-			umount -f "${DIRECTORY_MERGED}" > /dev/null 2>&1 || true
-
-			for DIRECTORY in "${DIRECTORY_LOWER}" "${DIRECTORY_UPPER}" "${DIRECTORY_WORK}" "${DIRECTORY_MERGED}"
-			do
-				rmdir --ignore-fail-on-non-empty --parents ${DIRECTORY} > /dev/null 2>&1 || true
-			done
-		done
-
-		# empty workdir otherwise there might happen stale file handles
-		if [ -d "${DIRECTORY_WORK}" ]
-		then
-			rm --preserve-root --one-file-system -rf "${DIRECTORY_WORK}"/*
-		fi
-	fi
-
-	# Unmounting ro bind mounts
-	if [ -n "${BIND_RO}" ]
-	then
-		# unmount in reverse order to allow nested bind mounts
-		BINDS_RO="$(echo ${BIND_RO} | sed -e 's|;| |g' | awk '{ for (i=NF; i>=1; i--) printf "%s ", $i; print ""}')"
-
-		for ENTRY in ${BINDS_RO}
-		do
-			TARGET="$(echo ${ENTRY} | awk -F: '{ print $2 }')"
-
-			umount -f "${MACHINES}/${NAME}/${TARGET}" > /dev/null 2>&1 || true
-		done
-	fi
-
-	# Unmounting rw bind mounts
-	if [ -n "${BIND}" ]
-	then
-		# unmount in reverse order to allow nested bind mounts
-		BINDS="$(echo ${BIND} | sed -e 's|;| |g' | awk '{ for (i=NF; i>=1; i--) printf "%s ", $i; print ""}')"
-
-		for ENTRY in ${BINDS}
-		do
-			TARGET="$(echo ${ENTRY} | awk -F: '{ print $2 }')"
-
-			umount -f "${MACHINES}/${NAME}/${TARGET}" > /dev/null 2>&1 || true
-		done
-	fi
-
 	# Unmounting pseudo-filesystems
 	umount -f "${DIRECTORY}/dev/pts" > /dev/null 2>&1 || true
 	umount -f "${DIRECTORY}/proc" > /dev/null 2>&1 || true
 	umount -f "${DIRECTORY}/sys" > /dev/null 2>&1 || true
+	umount -f "${DIRECTORY}/dev" > /dev/null 2>&1 || true
+	umount -f "${DIRECTORY}/boot/efi" > /dev/null 2>&1 || true
+
+	# Unmounting disk images
+	# FIXME unmount additinal images
+	umount -f "${DIRECTORY}" > /dev/null 2>&1 || true
+	kpartx -d "${MACHINES}/${NAME}.img"
 }
 
 Chroot ()
@@ -282,6 +219,14 @@ Upgrade_system ()
 	mount -o bind /proc "${DIRECTORY}/proc"
 	mount -o bind /sys "${DIRECTORY}/sys"
 
+	# also mount dev
+	mount -o bind /dev "${DIRECTORY}/dev"
+
+	if [ ! -z "${EFI_PARTITION}" ]
+	then
+		mkdir -p "${DIRECTORY}/boot/efi"
+		mount "/dev/mapper/loop0${EFI_PARTITION}" "${DIRECTORY}/boot/efi"
+	fi
 	# Disable dpkg syncing
 
 cat > "${DIRECTORY}/etc/dpkg/dpkg.cfg.d/${SOFTWARE}" << EOF
@@ -322,8 +267,11 @@ Cleanup_system ()
 
 	# Unmount pseudo-filesystems
 	umount -f "${DIRECTORY}/dev/pts" > /dev/null 2>&1 || true
+	# WARNING: dev/pts is still mounted!
 	umount -f "${DIRECTORY}/proc" > /dev/null 2>&1 || true
 	umount -f "${DIRECTORY}/sys" > /dev/null 2>&1 || true
+	umount -f "${DIRECTORY}/dev" > /dev/null 2>&1 || true
+	umount -f "${DIRECTORY}/boot/efi" > /dev/null 2>&1 || true
 }
 
 Debconf ()
@@ -372,7 +320,7 @@ Debootstrap ()
 	DIRECTORY="${1}"
 
 	EXCLUDE="ifupdown"
-	INCLUDE="dbus"
+	INCLUDE="dbus,linux-image-amd64,grub-pc"
 
 	# apt repositories
 	INCLUDE="${INCLUDE},gnupg"
@@ -466,10 +414,6 @@ Configure_system ()
 {
 	DIRECTORY="${1}"
 
-	# Overwrite resolv.conf from cache with hosts resolv.conf
-	rm -f "${DIRECTORY}/etc/resolv.conf"
-	cp /etc/resolv.conf "${DIRECTORY}/etc"
-
 	echo "${NAME}" > "${DIRECTORY}/etc/hostname"
 
 	# Configure apt
@@ -1108,15 +1052,67 @@ fi
 Upgrade_system "${CACHE}/${DISTRIBUTION}_${ARCHITECTURE}" || echo "W: If upgrading the system failed, try removing the cache for your distribution in /var/cache/${PROGRAM}"
 Cleanup_system "${CACHE}/${DISTRIBUTION}_${ARCHITECTURE}"
 
+# FIXME workaround: /dev/pts in CACHE is still mounted without the following line
+umount -f "${DIRECTORY}/dev/pts" > /dev/null 2>&1 || true
+
 ## Specific parts
-mkdir -p "${MACHINES}"
-cp -a "${CACHE}/${DISTRIBUTION}_${ARCHITECTURE}" "${MACHINES}/${NAME}"
+Create_Disk
+Mount_Disk
 
-Mount
+# FIXME this is evil
+cp -a "${CACHE}/${DISTRIBUTION}_${ARCHITECTURE}/"* "${MACHINES}/${NAME}/"
 
 Configure_system "${MACHINES}/${NAME}"
 Configure_network "${MACHINES}/${NAME}"
 Configure_systemd_networkd "${MACHINES}/${NAME}"
+
+# configure grub
+cat > "${MACHINES}/${NAME}/tmp/device.map" << EOF
+(hd0) /dev/loop0
+(hd0,gpt1) /dev/mapper/loop0p1
+(hd0,gpt2) /dev/mapper/loop0p2
+EOF
+
+case "${BOOT_METHOD}" in
+	bios)
+		grub-install								\
+			--no-floppy							\
+			--grub-mkdevicemap="${MACHINES}/${NAME}/tmp/device.map"		\
+			--modules="biosdisk part_gpt ext2 configfile normal multiboot"	\
+			--root-directory="${MACHINES}/${NAME}"				\
+			/dev/loop0
+		;;
+
+	efi)
+		# FIXME
+		chroot "${MACHINES}/${NAME}" /bin/sh -c 'DEBIAN_FRONTEND=noninteractive; apt-get install grub-efi -y'
+		chroot "${MACHINES}/${NAME}" grub-install --efi-directory=/boot/efi --no-bootsector --target x86_64-efi --no-nvram --no-uefi-secure-boot --force-extra-removable
+		echo "pass"
+		;;
+
+	*)
+		echo "Error, unrecognized BOOT_METHOD" >&2
+		exit 1
+esac
+
+chroot "${MACHINES}/${NAME}" update-grub
+
+# Configure fstab
+
+# FIXME DIRECTORY
+cat > "${DIRECTORY}/etc/fstab" << EOF
+# /etc/fstab: static file system information.
+#
+# Use 'blkid' to print the universally unique identifier for a
+# device; this may be used with UUID= as a more robust way to name devices
+# that works even if disks are added and removed. See fstab(5).
+#
+# <file system> <mount point>   <type>  <options>       <dump>  <pass>
+
+UUID=$(lsblk --fs --noheadings --output UUID /dev/mapper/loop0${SYSTEM_PARTITION}) /               ext4    errors=remount-ro 0       1
+EOF
+
+
 Cleanup_system "${MACHINES}/${NAME}"
 
 Commands "${MACHINES}/${NAME}"
-- 
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