restructuring & bit of documentation ;)

dracut module now in 'dnbd3-qcow2-rootfs'. ALLLLL dracut related stuff goes in here!

2 files changed, 0 insertions, 348 deletions

diff --git a/testModule/scripts/prepare-disks b/testModule/scripts/prepare-disks
deleted file mode 100755
index 2e68dd9e..00000000
--- a/testModule/scripts/prepare-disks
+++ /dev/null
@@ -1,211 +0,0 @@
-#!/bin/bash
-###############################################################################
-# GLOBALS
-#
-
-# flag file containing pids of running instances for concurrency checks
-declare -rg OPENSLX_DISK_FLAG="/tmp/openslx.disk"
-# file that will contain the name of the device used for the /tmp partition
-# - label 'OPENSLX_TMP' in GPT / type '0x44' in MBR
-declare -rg OPENSLX_TMP_MARKER="/tmp/openslx.disk.tmp"
-# file that will contain the name of the device used for storing qcow2
-# - label 'OPENSLX_SYS' in GPT / type '0x46' in MBR
-declare -rg OPENSLX_SYS_MARKER="/tmp/openslx.disk.sys"
-# mount point for system partition
-declare -rg OPENSLX_SYS_MOUNT="/opt/openslx/system"
-
-#
-# END GLOBALS
-###############################################################################
-
-###############################################################################
-# FUNCTION DEFINITIONS
-#
-# helper to mount the OPENSLX_SYS partition to /opt/openslx/system
-# Usage: mount_sys_part <path_to_sys_partition>
-mount_sys_part() {
-	if [ ! -b "$1" ]; then
-		warn "($$) Refusing to mount '$1' as its not a block device!"
-		return 1
-	fi
-
-	local OPENSLX_SYS_DEVICE="$1"
-	mkdir -p ${OPENSLX_SYS_MOUNT}
-	if ! mount -t auto "${OPENSLX_SYS_DEVICE}" "${OPENSLX_SYS_MOUNT}"; then
-		warn "($$) Mounting '${OPENSLX_SYS_DEVICE}' to '${OPENSLX_SYS_MOUNT}' failed."
-		return 1
-	fi
-	return 0
-
-}
-#
-# generic helper to format the given partition with the given filesystem or
-# from the prefdefined list of xfs, ext4, ...
-# Usage: format_disk <dev> <fs>
-#  e.g.  format_disk /dev/sda1 xfs
-format_disk () {
-	local TARGET_DEVICE="$1"
-	local fslist="xfs ext4"
-	# if we have a second arguments, its the filesystem of choice
-	local fs
-	[ $# -ge 2 ] && fslist="$2"
-	for fs in $fslist ; do
-		unset found
-		local MKFS="$(busybox which mkfs.$fs)"
-		if [ -n $MKFS ]; then
-			found=yes
-			case "mkfs.$fs" in
-				mkfs.xfs)   fopt="-fq"  ;;
-				mkfs.ext4)  fopt="-Fq"  ;;
-			esac
-			info "($$) Formatting $TARGET_DEVICE as $fs"
-			return $(${MKFS} ${fopt} "${TARGET_DEVICE}")
-		fi
-		[ -n "$found" ] && break
-	done
-	# still here? then we didn't find a proper formatter...
-	warn "($$) Could not format $PART_DEV as $fs."
-	return 1
-}
-
-#
-# END FUNCTION DEFINITIONS
-###############################################################################
-
-###############################################################################
-# MAIN CODE
-#
-
-command -v warn >/dev/null || . /lib/dracut-lib.sh
-
-# let check the arguments
-if [ "$#" -ne 2 ]; then
-	warn "($$) '$0' need 2 arguments: '$0 [OPENSLX_SYS|OPENSLX_TMP] <dev_path>'"
-	exit 1
-fi
-# $1 sane?
-if [ "x$1" != "xOPENSLX_SYS" ] && [ "x$1" != "xOPENSLX_TMP" ]; then
-	warn "($$) First arg needs to be either 'OPENSLX_SYS' or 'OPENSLX_TMP', given: $1"
-	exit 1
-fi
-# $2 sane?
-if [ ! -b "/dev/$2" ]; then
-	warn "($$) Second arg appears not to be a block device!"
-	exit 1
-fi
-
-# ok all seems well, set the arguments
-PART_TYPE="$1"
-PART_DEV="/dev/$2"
-
-unset OPENSLX_TMP_DEVICE
-unset OPENSLX_SYS_DEVICE
-
-# lets check if we are already running
-INSTANCES="$(grep "$PART_TYPE" "$OPENSLX_DISK_FLAG" | busybox wc -l)"
-if [ "$INSTANCES" -ge 1 ]; then
-	# uhoh we are not alone! Need to check
-	# if the other instance actually did its job
-	warn "($$) '$0' already running for $PART_TYPE on $PART_DEV... checking state."
-	# here two/three cases depending on which PART_TYPE we are
-	# currently processing.
-	for timeout in 1 1 2; do
-		# always give the other instance time to finish
-		# but only check 3 times overall
-		sleep $timeout
-		case "$PART_TYPE" in
-			OPENSLX_TMP)
-				# was the tmp partition marker created with a device?
-				if [ ! -f "${OPENSLX_TMP_MARKER}" ]; then
-					info "($$) Invalid state: no marker for $PART_TYPE"
-					continue
-				fi
-				# it was, is it a valid block device?
-				OPENSLX_TMP_DEVICE="$(cat ${OPENSLX_TMP_MARKER})"
-				if [ -z $OPENSLX_TMP_DEVICE -o ! -b $OPENSLX_TMP_DEVICE ]; then
-					info "($$) Invalid state: no for device $OPENSLX_TMP_DEVICE"
-					continue
-				fi
-				# its detected, its a block device and as mounting is
-				# done later, we can not check for more at this point
-				info "($$) Valid state for $OPENSLX_TMP_DEVICE as $PART_TYPE"
-				exit 0
-				;;
-			OPENSLX_SYS)
-				# was the system partition marker created with a device?
-				if [ ! -f "${OPENSLX_SYS_MARKER}" ]; then
-					info "($$) Invalid state: no marker for $PART_TYPE"
-					continue
-				fi
-				# it was, is it a valid block device?
-				OPENSLX_SYS_DEVICE="$(cat ${OPENSLX_SYS_MARKER})"
-				if [ -z $OPENSLX_SYS_DEVICE -o ! -b $OPENSLX_SYS_DEVICE ]; then
-					info "($$) Invalid state: no for device $OPENSLX_SYS_DEVICE"
-					continue
-				fi
-				# its detected, its a block device, is it mounted?
-				if mount | grep -qE "^$OPENSLX_SYS_DEVICE\ on $OPENSLX_SYS_MOUNT"; then
-					info "($$) Valid state for $OPENSLX_SYS_DEVICE as $PART_TYPE"
-					exit 0
-				fi
-				# if its not mounted, we want to keep on, so no exit!
-				;;
-			*)
-				# weird case which should never happen
-				warn "($$) If you see this, then $0 was called with a bad PART_TYPE: $@"
-				continue
-				;;
-		esac
-	done
-	warn "($$) Timeout reached!"
-	warn "($$) '$PART_TYPE' was found but not device was associated to it!"
-fi
-
-# We write our pid to $OPENSLX_DISK_FLAG in order to make sure
-# we are the only instance of this script running.
-info "($$) Processing: $PART_TYPE -> $PART_DEV ($$)"
-echo "$PART_TYPE.$$" >> "$OPENSLX_DISK_FLAG"
-
-# if we are still here, then we can go on and process the partition
-if [ "$PART_TYPE" = "OPENSLX_TMP" ]; then
-	# always format /tmp partition
-	if ! format_disk "${PART_DEV}" xfs; then
-		# error while formatting, cleanup
-		warn "($$) Error formatting $PART_DEV ... removing $$"
-		sed -i "/^${PART_TYPE}\.$$/d" "${OPENSLX_DISK_FLAG}"
-		exit 1
-	fi
-	info "($$) Using '$PART_DEV' as '$PART_TYPE'"
-	# mark it for later: in pre-pivot we will check this file
-	# and mount it as $NEWROOT/tmp
-	echo "$PART_DEV" > "$OPENSLX_TMP_MARKER"
-	# remove our pid from OPENSLX_DISK_FLAG
-	sed -i "/^${PART_TYPE}\.$$/d" "${OPENSLX_DISK_FLAG}"
-	exit 0
-fi
-if [ "$PART_TYPE" = "OPENSLX_SYS" ]; then
-	# TODO make the formatting of the system partition configurable
-	if ! format_disk "${PART_DEV}" xfs; then
-		# error while formatting, cleanup
-		warn "($$) Error formatting $PART_DEV ... removing $$"
-		sed -i "/^${PART_TYPE}\.$$/d" "${OPENSLX_DISK_FLAG}"
-		exit 1
-	fi
-	# mark it
-	# mount it now, since qemu-nbd needs it asap!
-	if mount_sys_part "$PART_DEV"; then
-		# mount worked, mark it as done
-		info "($$) Using '$PART_DEV' as '$PART_TYPE'"
-		echo "$PART_DEV" > "$OPENSLX_SYS_MARKER"
-		sed -i "/^${PART_TYPE}\.$$/d" "${OPENSLX_DISK_FLAG}"
-		exit 0
-	else
-		warn "($$) 'mount_sys_part' failed in $0"
-		sed -i "/^${PART_TYPE}\.$$/d" "${OPENSLX_DISK_FLAG}"
-		exit 1
-	fi
-fi
-
-#
-# END MAIN CODE
-###############################################################################
diff --git a/testModule/scripts/setup-qcow2 b/testModule/scripts/setup-qcow2
deleted file mode 100755
index 70babc17..00000000
--- a/testModule/scripts/setup-qcow2
+++ /dev/null
@@ -1,137 +0,0 @@
-#!/usr/bin/bash
-
-# dracut-lib to use debugging functions
-command -v warn >/dev/null || . /lib/dracut-lib.sh
-command -v emergency_shell >/dev/null || . /lib/dracut-lib.sh
-
-###############################################################################
-# GLOBALS
-#
-# TODO make this configurable
-[ -f /opt/openslx/config ] && . /opt/openslx/config
-[ -z $SLX_DNBD3_SERVER ] && SLX_DNBD3_SERVER="132.230.4.1"
-[ -z $SLX_STAGE4 ] && SLX_STAGE4="stage4/joe/centos7"
-[ -z $SLX_STAGE4_RID ] && SLX_STAGE4_RID="4"
-declare -rg DNBD3_SERVER="$SLX_DNBD3_SERVER"
-declare -rg DNBD3_IMAGE="$SLX_STAGE4"
-declare -rg DNBD3_RID="$SLX_STAGE4_RID"
-declare -rg DNBD3_DEVICE="/dev/dnbd0"
-declare -rg QCOW_CONTAINER="/opt/openslx/system/system.qcow2"
-#
-# END GLOBALS
-###############################################################################
-
-###############################################################################
-# FUNCTION DEFINITIONS
-#
-# helper to do some sanity checks
-check_dnbd3() {
-	if [ ! command -v "dnbd3-client" >/dev/null ]; then
-		warn "No 'dnbd3-client' found. Was the initramfs built correctly?"
-		emergency_shell -n "Error in $0"
-		return 1
-	fi
-	return 0
-}
-
-# helper to connect to the dnbd3-server
-connect_dnbd3() {
-	# check if it already connected
-	local current_image_name="$(cat /sys/block/${DNBD3_DEVICE#/dev/}/net/image_name)"
-	[ "x${current_image_name}" != "x(null)" ] && return 0
-
-	# not connected yet, do it
-	if ! dnbd3-client -h "${DNBD3_SERVER}" \
-							-i "${DNBD3_IMAGE}" \
-							-r "${DNBD3_RID}" \
-							-d "${DNBD3_DEVICE}" ; then
-		warn "Failed to mount $DNBD3_IMAGE from $DNBD3_SERVER to $DNBD3_DEVICE"
-		emergency_shell -n "Error in $0"
-		return 1
-	fi
-	return 0
-}
-
-# helper to create the qcow2 container file using
-# DNBD3_DEVICE as the base of the filesystem
-# QCOW_CONTAINER as the writable file
-# (our future rootfs)
-create_qcow() {
-	# check if we already created the qcow2-container
-	[ -e "$QCOW_CONTAINER" ] && return 0
-
-	# check if we have our target directory, if not create it
-	[ ! -d "$(busybox dirname $QCOW_CONTAINER)" ] && \
-		mkdir -p "$(busybox dirname $QCOW_CONTAINER)"
-
-	# we did not, let's create it
-	if ! qemu-img create -f qcow2 -o \
-		backing_file="$DNBD3_DEVICE",backing_fmt=qcow2 "$QCOW_CONTAINER"; then
-		warn "Failed to create qcow2-Container from $DNBD3_DEVICE"
-		emergency_shell -n "Error in $0"
-		rm -f -- "$QCOW_CONTAINER"
-		return 1
-	fi
-	return 0
-}
-# helper to start qemu-nbd on localhost:2000
-# use our wrapper to set argv[0][0] to '@'
-# this keeps qemu-nbd running after switching root
-export_qcow() {
-	# check if we already have a qemu-nbd
-	if [ -e /tmp/qemu-nbd.pid ]; then
-			kill -0 $(cat /tmp/qemu-nbd.pid) && return 0
-	fi
-	# since we use the wrapper, we need a little more logic to see if it runs
-	/usr/bin/systemd-preserve-process-marker \
-		/usr/bin/qemu-nbd -t -p 2000 "$QCOW_CONTAINER" &
-	# the wrapper returns 255 if the qemu-nbd binary is missing
-	local qemu_nbd_pid="$!"
-	for i in 0.5 1 2; do
-		sleep $i
-		if ! kill -0 $qemu_nbd_pid; then
-			# not running
-			wait $qemu_nbd_pid
-			local ret_wrapper="$?"
-			if [ "${ret_wrapper}" -eq 127 ]; then
-				# wrapper was not found by bash
-				warn "No such file or directory: /usr/bin/systemd-preserve-process-marker"
-			elif [ "${ret_wrapper}" -eq 255 ]; then
-				# qemu-nbd was not found
-				warn "No such file or directory: /usr/bin/qemu-nbd"
-			fi
-			emergency_shell -n "Error in $0"
-			return 1
-		else
-			# all good, qemu-nbd is running, remember its pid
-			echo $qemu_nbd_pid > /tmp/qemu-nbd.pid
-			return 0
-		fi
-	done
-	# fallback
-	return 1
-}
-# helper to mount the qcow2-container per nbd
-connect_qcow() {
-	# try to mount the locally exported qcow2-container using nbd-client
-	if /usr/bin/systemd-preserve-process-marker \
-		nbd-client --persist 127.0.0.1 2000 /dev/nbd0; then
-		# it worked, lets set the symlink to /dev/root as dracut needs it
-		# later on to mount that device to the future root (/sysroot)
-		ln -sf /dev/nbd0 /dev/root
-		return 0
-	else
-		# this is pretty bad, dracut would spawn an emergency later on
-		# since there is no /dev/root to mount.
-		# For debugging purposes, we drop an emergency shell ourselves
-		# if the mount fails.
-		warn "Could not mount /dev/nbd0 from 127.0.0.1:2000."
-		emergency_shell -n "Error in $0"
-		return 1
-	fi
-}
-#
-# END FUNCTION DEFINITIONS
-###############################################################################
-
-# No main, use functions!