basic cnt build for vms (debconf only)

5 files changed, 485 insertions, 6 deletions

diff --git a/share/build-scripts/debconf b/share/build-scripts/debconf
index 900242d..8307695 100755
--- a/share/build-scripts/debconf
+++ b/share/build-scripts/debconf
@@ -31,11 +31,12 @@ CACHE="/var/cache/${PROGRAM}/build-$(basename ${SCRIPT})"
 CONFIG="/etc/${SOFTWARE}/config"
 HOOKS="/etc/${SOFTWARE}/hooks"
 MACHINES="/var/lib/machines"
+VMS="/srv/container/vms"
 
 Parameters ()
 {
-	GETOPT_LONGOPTIONS="bind:,bind-ro:,script:,name:,preseed-file:"
-	GETOPT_OPTIONS="b:,s:,n:,p:"
+	GETOPT_LONGOPTIONS="bind:,bind-ro:,boot-method:,script:,name:,preseed-file:,vm"
+	GETOPT_OPTIONS="b:,s:,n:,p:,v:"
 
 	PARAMETERS="$(getopt --longoptions ${GETOPT_LONGOPTIONS} --name=${SCRIPT} --options ${GETOPT_OPTIONS} --shell sh -- ${@})"
 
@@ -60,6 +61,11 @@ Parameters ()
 				shift 2
 				;;
 
+			--boot-method)
+				BOOT_METHOD="${2}"
+				shift 2
+				;;
+
 			--cnt.auto)
 				# ignore
 				shift 2
@@ -85,6 +91,11 @@ Parameters ()
 				shift 2
 				;;
 
+			--vm)
+				VM="TRUE"
+				shift 1
+				;;
+
 			--)
 				shift 1
 				break
@@ -100,7 +111,7 @@ Parameters ()
 
 Usage ()
 {
-	echo "Usage: container build -n|--name NAME -s|--script ${SCRIPT} -- [-p|--preseed-file FILE]" >&2
+	echo "Usage: container build -n|--name NAME -s|--script ${SCRIPT} [--boot-method systemd-nswawn|qemu] -- [-p|--preseed-file FILE]" >&2
 	exit 1
 }
 
@@ -251,9 +262,20 @@ Umount ()
 	fi
 
 	# Unmounting pseudo-filesystems
+	# FIXME this should not be necessary
+	umount -f "${DIRECTORY}/dev" > /dev/null 2>&1 || true
 	umount -f "${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
+
+	# Unmounting disk images
+	if [ "${BOOT_METHOD}" = "qemu" ]
+	then
+		umount -f "${DIRECTORY}/boot/efi" > /dev/null 2>&1 || true
+		umount -f "${DIRECTORY}" > /dev/null 2>&1 || true
+		rmdir "${MACHINES}/${NAME}"
+		kpartx -d "${VMS}/${NAME}/root.img"
+	fi
 }
 
 Chroot ()
@@ -368,7 +390,8 @@ Bootstrap ()
 	DIRECTORY="${1}"
 
 	EXCLUDE="ifupdown"
-	INCLUDE="dbus"
+	#FIXME amd64 hardcoded
+	INCLUDE="dbus,linux-image-amd64,grub-efi-amd64"
 
 	# apt repositories
 	INCLUDE="${INCLUDE},gnupg"
@@ -1101,6 +1124,60 @@ EOF
 	done
 }
 
+Configure_vm ()
+{
+	DIRECTORY="${1}"
+
+	# FIXME duplicate definition
+	EFI_PARTITION="p1"
+	SYSTEM_PARTITION="p2"
+	EFI_UUID="$(lsblk --output UUID --noheadings /dev/mapper/loop0${EFI_PARTITION})"
+	ROOT_UUID="$(lsblk --output UUID --noheadings /dev/mapper/loop0${SYSTEM_PARTITION})"
+	echo "UUID=${ROOT_UUID} / ext4 discard,noatime,errors=remount-ro 0 1" >> ${DIRECTORY}/etc/fstab
+	echo "UUID=${EFI_UUID} /boot/efi vfat umask=0077 0 1" >> ${DIRECTORY}/etc/fstab
+
+	mkdir -p ${DIRECTORY}/boot/efi/EFI/progress-linux
+	cp ${DIRECTORY}/usr/lib/grub/x86_64-efi/monolithic/grubx64.efi ${DIRECTORY}/boot/efi/EFI/progress-linux/
+
+cat > ${DIRECTORY}/boot/efi/EFI/progress-linux/grub.cfg << EOF
+search.fs_uuid ${ROOT_UUID} root
+set prefix=(\$root)'/boot/grub'
+configfile \$prefix/grub.cfg
+EOF
+
+cat >> ${DIRECTORY}/etc/initramfs-tools/modules << EOF
+
+# enable virtio
+virtio_pci
+virtio_blk
+virtio_net
+EOF
+
+	Chroot ${DIRECTORY} update-initramfs -u
+
+	mount -o bind /dev ${DIRECTORY}/dev
+	Chroot ${DIRECTORY} update-grub
+
+	# FIXME workaround for grub not being installed as EFI/boot/bootx86.efi
+	mkdir "${DIRECTORY}/boot/efi/EFI/boot"
+	echo 'fs0:\EFI\progress-linux\grubx64.efi' > "${DIRECTORY}/boot/efi/EFI/boot/startup.nsh"
+
+	sed -i \
+		-e "s|@BOOT_METHOD@|${BOOT_METHOD}|g" \
+		-e "s|@CPU@|${CPU}|g" \
+		-e "s|@MEMORY@|${MEMORY}|g" \
+		-e "s|@DISPLAY@|${DISPLAY}|g" \
+		-e "s|@SERIAL@|${SERIAL}|g" \
+		-e "s|@MONITOR@|${MONITOR}|g" \
+		-e "s|@FIRMWARE@|${FIRMWARE}|g" \
+		-e "s|@DRIVE@|${DRIVE}|g" \
+		-e "s|@NETDEV@|${NETDEV}|g" \
+		-e "s|@QEMU_RAW@|${QEMU_RAW}|g" \
+	"${CONFIG}/${NAME}.conf"
+
+}
+
+
 Commands ()
 {
 	DIRECTORY="${1}"
@@ -1117,6 +1194,7 @@ Commands ()
 		-e "s|^bind=.*|bind=${BIND}|g" \
 		-e "s|^bind-ro=.*|bind-ro=${BIND_RO}|g" \
 		-e "s|^network-veth-extra=.*|network-veth-extra=${HOST_INTERFACE_NAME}:eno1|g" \
+		-e "s|@PRIMARY_TAP@|${HOST_INTERFACE_NAME}|g" \
 	"${CONFIG}/${NAME}.conf"
 
 	if [ "${NETWORK_NUMBER}" -ge 2 ]
@@ -1179,6 +1257,67 @@ Commands ()
 	esac
 }
 
+Create_vm_disk ()
+{
+	mkdir -p "${VMS}/${NAME}"
+
+	# FIXME drive-image file size as arg or preseed
+	DRIVE_SIZE=12000
+
+	# FIXME image name
+	dd if=/dev/zero of="${VMS}/${NAME}/root.img" bs=1024k count=0 seek="${DRIVE_SIZE}"
+	parted "${VMS}/${NAME}/root.img" mklabel gpt
+
+
+	# FIXME only for root image
+	case "${FIRMWARE}" in
+		legacy)
+			# FIXME number partitions and size scrip and everything
+			parted -a optimal "${VMS}/${NAME}/root.img" mkpart BIOS-BOOT 1MB 2MB
+			parted "${VMS}/${NAME}/root.img" set 1 bios_grub on
+			parted -a optimal "${VMS}/${NAME}/root.img" mkpart SYSTEM 2MB 100%
+			SYSTEM_PARTITION="p2"
+			;;
+
+		efi)
+			parted -a optimal "${VMS}/${NAME}/root.img" mkpart EFI fat32 1M 1000M
+			parted "${VMS}/${NAME}/root.img" set 1 esp on
+			parted -a optimal "${VMS}/${NAME}/root.img" mkpart SYSTEM 1000MB 100%
+			EFI_PARTITION="p1"
+			SYSTEM_PARTITION="p2"
+
+			# efi bios
+			cp /usr/share/qemu/OVMF.fd "${VMS}/${NAME}/firmware.fd"
+			;;
+
+		*)
+			echo "Error, unrecognized firware." >&2
+			exit 1
+	esac
+
+	kpartx -av "${VMS}/${NAME}/root.img"
+	# FIXME loop number hardcoded
+	mkfs.ext4 "/dev/mapper/loop0${SYSTEM_PARTITION}"
+
+	if [ ! -z "${EFI_PARTITION}" ]
+	then
+		mkfs.vfat -F 32 "/dev/mapper/loop0${EFI_PARTITION}"
+	fi
+
+	# FIXME swap, more discs
+}
+
+Mount_vm_disk ()
+{
+	# FIXME probably not necessary
+	mkdir -p "${MACHINES}/${NAME}"
+
+	# FIXME partition number hardcoded
+	mount "/dev/mapper/loop0${SYSTEM_PARTITION}" "${MACHINES}/${NAME}"
+	mkdir -p "${MACHINES}/${NAME}/boot/efi"
+	mount "/dev/mapper/loop0${EFI_PARTITION}" "${MACHINES}/${NAME}/boot/efi"
+}
+
 # Trap function
 trap 'Umount' EXIT HUP INT QUIT TERM
 
@@ -1218,6 +1357,13 @@ else
 	INSTALLER="image"
 fi
 
+case "${BOOT_METHOD}" in
+	qemu)
+		Create_vm_disk
+		Mount_vm_disk
+		;;
+esac
+
 case "${INSTALLER}" in
 	bootstrap)
 		## Dependencies
@@ -1246,8 +1392,11 @@ case "${INSTALLER}" in
 		Cleanup_system "${CACHE}/${DISTRIBUTION}_${ARCHITECTURE}"
 
 		## Specific parts
-		mkdir -p "${MACHINES}"
-		cp -a "${CACHE}/${DISTRIBUTION}_${ARCHITECTURE}" "${MACHINES}/${NAME}"
+
+		# FIXME is there a better way to do this?
+		mkdir -p "${MACHINES}/${NAME}"
+		cp -a "${CACHE}/${DISTRIBUTION}_${ARCHITECTURE}/"* "${MACHINES}/${NAME}/"
+
 		;;
 
 	image)
@@ -1300,6 +1449,15 @@ Mount
 Configure_system "${MACHINES}/${NAME}"
 Configure_network "${MACHINES}/${NAME}"
 Configure_systemd_networkd "${MACHINES}/${NAME}"
+
+case "${BOOT_METHOD}" in
+	qemu)
+		echo DEBUG: Configure_vm start
+		Configure_vm "${MACHINES}/${NAME}"
+		echo DEBUG: Configure_vm end
+		;;
+esac
+
 Cleanup_system "${MACHINES}/${NAME}"
 
 Commands "${MACHINES}/${NAME}"
diff --git a/share/build-scripts/debconf.d/0003-debconf b/share/build-scripts/debconf.d/0003-debconf
index e12e25e..76da4c2 100755
--- a/share/build-scripts/debconf.d/0003-debconf
+++ b/share/build-scripts/debconf.d/0003-debconf
@@ -1340,6 +1340,195 @@ Internal_options ()
 	echo "CNT_OVERLAY_OPTIONS=\"${CNT_OVERLAY_OPTIONS}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
 }
 
+Cpu ()
+{
+	db_get container/cpu
+	CPU="${RET}" # select
+
+	if [ -z "${CPU}" ]
+	then
+		CPU="${RET}" # string (w/o empty)
+
+		case "${CPU}" in
+			debconf)
+				CPU="host"
+				;;
+		esac
+	fi
+
+	echo "CPU=\"${CPU}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
+	export CPU
+}
+
+Memory ()
+{
+	db_get container/memory
+	MEMORY="${RET}" # select
+
+	if [ -z "${MEMORY}" ]
+	then
+		MEMORY="${RET}" # string (w/o empty)
+
+		case "${MEMORY}" in
+			debconf)
+				MEMORY="2G"
+				;;
+		esac
+	fi
+
+	echo "MEMORY=\"${MEMORY}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
+	export MEMORY
+}
+
+Display ()
+{
+	db_get container/display
+	DISPLAY="${RET}" # select
+
+	if [ -z "${DISPLAY}" ]
+	then
+		DISPLAY="${RET}" # string (w/o empty)
+
+		case "${DISPLAY}" in
+			debconf)
+				DISPLAY="2G"
+				;;
+		esac
+	fi
+
+	echo "DISPLAY=\"${DISPLAY}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
+	export DISPLAY
+}
+
+Serial ()
+{
+	db_get container/serial
+	SERIAL="${RET}" # select
+
+	if [ -z "${SERIAL}" ]
+	then
+		SERIAL="${RET}" # string (w/o empty)
+
+		case "${SERIAL}" in
+			debconf)
+				SERIAL="host"
+				;;
+		esac
+	fi
+
+	echo "SERIAL=\"${SERIAL}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
+	export SERIAL
+}
+
+Monitor ()
+{
+	db_get container/monitor
+	MONITOR="${RET}" # select
+
+	if [ -z "${MONITOR}" ]
+	then
+		MONITOR="${RET}" # string (w/o empty)
+
+		case "${MONITOR}" in
+			debconf)
+				MONITOR="host"
+				;;
+		esac
+	fi
+
+	echo "MONITOR=\"${MONITOR}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
+	export MONITOR
+}
+
+Firmware ()
+{
+	db_get container/firmware
+	FIRMWARE="${RET}" # select
+
+	if [ -z "${FIRMWARE}" ]
+	then
+		FIRMWARE="${RET}" # string (w/o empty)
+
+		case "${FIRMWARE}" in
+			debconf)
+				FIRMWARE="host"
+				;;
+		esac
+	fi
+
+	echo "FIRMWARE=\"${FIRMWARE}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
+	export FIRMWARE
+}
+
+Drive ()
+{
+	db_get container/drive
+	DRIVE="${RET}" # select
+
+	if [ -z "${DRIVE}" ]
+	then
+		DRIVE="${RET}" # string (w/o empty)
+
+		case "${DRIVE}" in
+			debconf)
+				DRIVE="host"
+				;;
+		esac
+	fi
+
+	echo "DRIVE=\"${DRIVE}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
+	export DRIVE
+}
+
+Netdev ()
+{
+	db_get container/netdev
+	NETDEV="${RET}" # string (w/ empty)
+
+	echo "NETDEV=\"${NETDEV}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
+	export NETDEV
+}
+
+Qemu_raw ()
+{
+	db_get container/qemu-raw
+	QEMU_RAW="${RET}" # select
+
+	if [ -z "${QEMU_RAW}" ]
+	then
+		QEMU_RAW="${RET}" # string (w/o empty)
+
+		case "${QEMU_RAW}" in
+			debconf)
+				QEMU_RAW="host"
+				;;
+		esac
+	fi
+
+	echo "QEMU_RAW=\"${QEMU_RAW}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
+	export QEMU_RAW
+}
+
+Boot_method ()
+{
+	db_get container/boot-method
+	BOOT_METHOD="${RET}" # select
+
+	if [ -z "${BOOT_METHOD}" ]
+	then
+		BOOT_METHOD="${RET}" # string (w/o empty)
+
+		case "${BOOT_METHOD}" in
+			debconf)
+				BOOT_METHOD="systemd-nspawn"
+				;;
+		esac
+	fi
+
+	echo "BOOT_METHOD=\"${BOOT_METHOD}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
+	export BOOT_METHOD
+}
+
 Mode
 Images
 
@@ -1368,4 +1557,24 @@ Root_password
 
 Internal_options
 
+Cpu
+
+Memory
+
+Display
+
+Serial
+
+Monitor
+
+Firmware
+
+Drive
+
+Netdev
+
+Qemu_raw
+
+Boot_method
+
 db_stop
diff --git a/share/build-scripts/debconf.d/0003-debconf.templates b/share/build-scripts/debconf.d/0003-debconf.templates
index 551033a..5d83df3 100644
--- a/share/build-scripts/debconf.d/0003-debconf.templates
+++ b/share/build-scripts/debconf.d/0003-debconf.templates
@@ -274,3 +274,85 @@ Description: Nameserver Resolver Options?
  See resolv.conf(5) for more information about the 'options' option.
  .
  This defaults to empty.
+
+Template: container/cpu
+Type: string
+Default:
+Description: Cpu
+ VM CPU should be emulated.
+ .
+ Use 'host' for kvm.
+ .
+ This defaults to empty.
+
+Template: container/memory
+Type: string
+Default:
+Description: Memory
+ Memory options for the VM.
+ .
+ This defaults to empty.
+
+Template: container/display
+Type: string
+Default:
+Description: Display
+ Display options for the VM.
+ .
+ This defaults to empty.
+
+Template: container/serial
+Type: string
+Default:
+Description: Serial
+ Serial options for the VM.
+ .
+ This defaults to empty.
+
+Template: container/monitor
+Type: string
+Default:
+Description: Monitor
+ Monitor options for the VM.
+ .
+ This defaults to empty.
+
+Template: container/firmware
+Type: string
+Default:
+Description: Firmware
+ Firmware options for the VM.
+ .
+ This defaults to empty.
+
+Template: container/drive
+Type: string
+Default:
+Description: Drive
+ Drive options for the VM.
+ .
+ This defaults to empty.
+
+Template: container/netdev
+Type: string
+Default:
+Description: Netdev
+ Netdev options for the VM.
+ .
+ This defaults to empty.
+
+Template: container/qemu-raw
+Type: string
+Default:
+Description: Qemu-raw
+ Raw options for the VM.
+ .
+ This defaults to empty.
+
+Template: container/boot-method
+Type: string
+Default:
+Description: Boot-method
+ Either 'efi' or 'legacy'.
+ .
+ This defaults to empty.
diff --git a/share/config/container.conf.in b/share/config/container.conf.in
index d3f9a48..9a0c9b2 100644
--- a/share/config/container.conf.in
+++ b/share/config/container.conf.in
@@ -10,6 +10,7 @@ cnt.start=@CNT_START@
 bind=@BIND@
 bind-ro=@BIND_RO@
 boot=@BOOT@
+boot-method=@BOOT_METHOD@
 capability=@CAPABILITY@
 directory=@DIRECTORY@
 drop-capability=@DROP_CAPABILITY@
@@ -28,3 +29,16 @@ CPUQuota=
 CPUShares=
 MemoryLimit=
 TasksMax=
+
+[vm]
+vm.memory=@MEMORY@
+vm.cpu=@CPU@
+vm.display=@DISPLAY@
+vm.serial=@SERIAL@
+vm.mon=@MONITOR@
+vm.firmware=@FIRMWARE@
+
+vm.drive=@DRIVE@
+vm.netdev=@NETDEV@
+
+vm.raw=@QEMU_RAW@
diff --git a/share/doc/vms.txt b/share/doc/vms.txt
new file mode 100644
index 0000000..453ce23
--- /dev/null
+++ b/share/doc/vms.txt
@@ -0,0 +1,16 @@
+Manage Virtual Machines (VMs)
+=============================
+
+Status:
+
+- only debconf is supported
+
+HOWTO:
+
+to generate a vm image, provide the --vm option:
+
+    cnt build -n test --vm
+
+dependencies:
+
+    apt install qemu-system ovmf