Merge branch 'master' of git.openslx.org:openslx-ng/systemd-init

18 files changed, 429 insertions, 91 deletions

diff --git a/testModule/hooks/cmdline/enable-sysrq.sh b/testModule/hooks/cmdline/enable-sysrq.sh
new file mode 100755
index 00000000..f779aa7a
--- /dev/null
+++ b/testModule/hooks/cmdline/enable-sysrq.sh
@@ -0,0 +1,2 @@
+# enables magic sysrq keys
+echo 1 > /proc/sys/kernel/sysrq
diff --git a/testModule/hooks/cmdline.sh b/testModule/hooks/cmdline/expand-kcl-ip.sh
index b1f06ea6..8be1c718 100755
--- a/testModule/hooks/cmdline.sh
+++ b/testModule/hooks/cmdline/expand-kcl-ip.sh
@@ -1,5 +1,3 @@
-echo 1 > /proc/sys/kernel/sysrq
-
 # fakes the cmdline to fix the ip parsing when using
 # syslinux's IPAPPEND 1 mask
 [ -d /fake ] || mkdir /fake
@@ -12,11 +10,11 @@ mount -t tmpfs tmpfs /fake
 sed 's/\(ip=\([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}:\([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}:\([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}:\([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}\)/\1:hiwi:eno1:none/' /proc/cmdline > /fake/cmdline
 
 # bind mount it. Can we trust mount return codes here?
-# if so, we should check what we get in $?
+# # if so, we should check what we get in $?
 mount -o bind /fake/cmdline /proc/cmdline
 
 # check if it worked
 if ! grep 'hiwi:eth0:none' /proc/cmdline; then
-    command -v warn >/dev/null || . /lib/dracut-lib.sh
-    warn 'Haxing cmdline did not work :( sad pandaz...'
+	command -v warn >/dev/null || . /lib/dracut-lib.sh
+	warn 'Haxing cmdline did not work :( sad pandaz...'
 fi
diff --git a/testModule/hooks/cmdline/mark-root-device.sh b/testModule/hooks/cmdline/mark-root-device.sh
new file mode 100755
index 00000000..b7282521
--- /dev/null
+++ b/testModule/hooks/cmdline/mark-root-device.sh
@@ -0,0 +1,9 @@
+# set rootok and root as dracut expects them to be set by
+# the module preparing the root filesystem.
+#
+# Once the root filesystem is mounted per dnbd3 and
+# exported as qcow2 per nbd, /dev/root will be a symlink
+# to /dev/nbd0 as this is then our rootfs-device
+rootok=1
+root=block:/dev/root
+
diff --git a/testModule/hooks/mount.sh b/testModule/hooks/mount.sh
deleted file mode 100755
index e893642d..00000000
--- a/testModule/hooks/mount.sh
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/bin/bash
-
-mount /dev/root $NEWROOT
diff --git a/testModule/hooks/mount/mount-root-device.sh b/testModule/hooks/mount/mount-root-device.sh
new file mode 100755
index 00000000..d02f9002
--- /dev/null
+++ b/testModule/hooks/mount/mount-root-device.sh
@@ -0,0 +1,4 @@
+# this rudimentary script just mounts the rootfs device that was symlinked to
+# /dev/root to dracut's $NEWROOT (usually /sysroot).
+
+mount /dev/root $NEWROOT
diff --git a/testModule/hooks/nbd-cmdline.sh b/testModule/hooks/nbd-cmdline.sh
deleted file mode 100755
index 6464646f..00000000
--- a/testModule/hooks/nbd-cmdline.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-rootok=1
-root=block:/dev/root
-
diff --git a/testModule/hooks/pre-mount.sh b/testModule/hooks/pre-mount.sh
deleted file mode 100755
index b22cdc35..00000000
--- a/testModule/hooks/pre-mount.sh
+++ /dev/null
@@ -1,9 +0,0 @@
-#!/usr/bin/bash
-
-while ! /sbin/setup-qcow2; do
-    sleep 0.5
-done
-
-while ! /sbin/setup-nbdroot; do
-    sleep 0.5
-done
diff --git a/testModule/hooks/pre-mount/fetch-config.sh b/testModule/hooks/pre-mount/fetch-config.sh
new file mode 100755
index 00000000..013b0058
--- /dev/null
+++ b/testModule/hooks/pre-mount/fetch-config.sh
@@ -0,0 +1,12 @@
+command -v info >/dev/null || . /lib/dracut-lib.sh
+
+info "Getting configuration from OPENSLX-Server..."
+
+WGET="$(busybox which wget)"
+if [ -z $WGET ]; then
+	# do nothing
+	warn "'wget' not found. Skipping openslx configuration..."
+	exit 1
+fi
+mkdir -p /opt/openslx
+$WGET http://10.4.9.51/openslx/config -O /opt/openslx/config
diff --git a/testModule/hooks/pre-mount/mount-qcow.sh b/testModule/hooks/pre-mount/mount-qcow.sh
new file mode 100755
index 00000000..d70492bf
--- /dev/null
+++ b/testModule/hooks/pre-mount/mount-qcow.sh
@@ -0,0 +1,49 @@
+###############################################################################
+# CHECKS
+#
+
+SETUP_ROOTFS_SCRIPT="/sbin/setup-qcow2"
+
+if [ ! -e "${SETUP_ROOTFS_SCRIPT}" ]; then
+	warn "No such file of directory: ${SETUP_ROOTFS_SCRIPT}"
+	emergency_shell -n "Error in $0"
+	return 1
+fi
+
+if [ ! -x "${SETUP_ROOTFS_SCRIPT}" ]; then
+	warn "Cannot execute: ${SETUP_ROOTFS_SCRIPT}"
+	emergency_shell -n "Error in $0"
+	return 1
+fi
+
+#
+# END CHECKS
+###############################################################################
+
+###############################################################################
+# MAIN CODE
+#
+
+# ok, let's source the setup script
+if ! . ${SETUP_ROOTFS_SCRIPT} ; then
+	warn "Could not source: ${SETUP_ROOTFS_SCRIPT}"
+	emergency_shell -n "Error in $0"
+	return 1
+fi
+
+# just go over the functions in the right order ;-)
+for fun in connect_dnbd3 create_qcow export_qcow connect_qcow; do
+	if ! $fun; then
+		# something failed, drop a shell for debugging
+		warn "'$fun' failed with: $?"
+		emergency_shell -n "Error in $fun"
+		return 1
+	fi
+done
+
+# all good, we are done
+return 0
+
+#
+# END MAIN CODE
+###############################################################################
diff --git a/testModule/hooks/pre-pivot/mount-tmp.sh b/testModule/hooks/pre-pivot/mount-tmp.sh
new file mode 100755
index 00000000..3fa24cce
--- /dev/null
+++ b/testModule/hooks/pre-pivot/mount-tmp.sh
@@ -0,0 +1,38 @@
+# This script only checks if we found a usable partition for the
+# future /tmp. The discovery of that partition is done by udev during
+# the initqueue. If a valid partition is found (either GPT with the label
+# OPENSLX_TMP or MBR with the type 0x44) its path will be written to
+# /tmp/openslx.tmpdisk
+OPENSLX_TMP_DISK_FLAG="/tmp/openslx.disk.tmp"
+
+if [ ! -e "$OPENSLX_TMP_DISK_FLAG" ]; then
+	warn "'$OPENSLX_TMP_DISK_FLAG' not found!"
+	warn "Systemd will manage $NEWROOT/tmp on its own."
+	# no partition for the future /tmp found, just
+	# let systemd manage it then (probably a tmpfs)
+	return 1
+fi
+
+# in /tmp/openslx.disk.tmp is the name of the device
+# to mount as /tmp in the real system
+# meaning we need to mount it to /sysroot/tmp here.
+
+OPENSLX_TMP_DISK_DEV="$(cat $OPENSLX_TMP_DISK_FLAG)"
+
+# sanity check: is the content a block device?
+if [ ! -b "$OPENSLX_TMP_DISK_DEV" ]; then
+	warn "'$OPENSLX_TMP_DISK_DEV' appears not to be a block device!"
+	warn "Systemd will manage $NEWROOT/tmp on its own."
+	return 1
+fi
+
+# all good, keep on
+if ! mount -t auto "$OPENSLX_TMP_DISK_DEV" /sysroot/tmp; then
+	# something else went wrong :(
+	warn "Mounting '$OPENSLX_TMP_DISK_DEV' to '/sysroot/tmp' failed with: $!"
+	warn "Systemd will manage $NEWROOT/tmp on its own."
+	return 1
+fi
+
+# still here? mount worked wohoo
+return 0
diff --git a/testModule/hooks/pre-udev.sh b/testModule/hooks/pre-udev/load-dnbd3-nbd-modules.sh
index 578169e9..29f9f210 100755
--- a/testModule/hooks/pre-udev.sh
+++ b/testModule/hooks/pre-udev/load-dnbd3-nbd-modules.sh
@@ -1,19 +1,10 @@
-#!/usr/bin/bash
-
 # include dracut-lib.sh to use 'warn'
 command -v warn >/dev/null || . /lib/dracut-lib.sh
 
-SETUP_SCRIPT="/sbin/setup-qcow2"
-NBDROOT_SCRIPT="/sbin/setup-nbdroot"
 NBD_MOD_PATH="/usr/lib/modules/current/extra/nbd.ko"
 DNBD3_MOD_PATH="/usr/lib/modules/current/extra/dnbd3.ko"
 
-# sanity checks
-if [ ! -e "${SETUP_SCRIPT}" ]; then
-	warn "No such file of directory: ${SETUP_SCRIPT}"
-	emergency_shell -n "Error in $0"
-	return 1
-fi
+# do we actually have our modules?
 if [ ! -e "${NBD_MOD_PATH}" ]; then
 	warn "No such file of directory: ${NBD_MOD_PATH}"
 	emergency_shell -n "Error in $0"
@@ -26,19 +17,16 @@ if [ ! -e "${DNBD3_MOD_PATH}" ]; then
 fi
 
 # load the kernel modules for dnbd3 and nbd
-if ! insmod /usr/lib/modules/current/extra/dnbd3.ko; then
+if ! insmod "${DNBD3_MOD_PATH}"; then
 	warn "Failed to load DNBD3 kernel module..."
 	emergency_shell -n "Error in $0"
 	return 1
 fi
 
-if ! insmod /usr/lib/modules/current/extra/nbd.ko; then
+if ! insmod "${NBD_MOD_PATH}"; then
 	warn "Failed to load NBD kernel module..."
 	emergency_shell -n "Error in $0"
 	return 1
 fi
 
-# now let's "install" the setup script in the initqueue
-#/sbin/initqueue --settled --unique "${SETUP_SCRIPT}"
-#/sbin/initqueue --settled --unique "${NBDROOT_SCRIPT}"
-#/sbin/initqueue --settled --unique "/sbin/retry-nbdroot"
+return 0
diff --git a/testModule/module-setup.sh b/testModule/module-setup.sh
index 839e5deb..e40069ce 100644
--- a/testModule/module-setup.sh
+++ b/testModule/module-setup.sh
@@ -42,38 +42,76 @@ installkernel() {
 }
 
 install() {
-    # cause we need reboots
-    inst "$moddir/scripts/r" /usr/bin/r
-    # Needed to mount remote dnbd3 filesystem.
-    inst "$moddir/binaries/dnbd3-client" /usr/bin/dnbd3-client
+    ### BINARIES
+    #
+    # busybox: cause we want lightweight tools
     inst "$moddir/binaries/busybox" /usr/bin/busybox
-    # A generic wrapper program to prepend a "@" to each process spawned by
-    # given nested programs.
+    # dnbd3-client: needed to mount remote dnbd3 filesystem.
+    inst "$moddir/binaries/dnbd3-client" /usr/bin/dnbd3-client
+    # A generic wrapper program to prepend a "@" to each process
+    # spawned by given nested programs.
     inst "$moddir/binaries/systemd-preserve-process-marker" \
         /usr/bin/systemd-preserve-process-marker
 
     # NOTE: These modules are build again Kernel: 3.10.0-229.1.2.el7.x86_64
+    # TODO: build these in check() !
     inst "$moddir/kernel_modules/dnbd3.ko" \
         /usr/lib/modules/current/extra/dnbd3.ko
     inst "$moddir/kernel_modules/nbd.ko" \
         /usr/lib/modules/current/extra/nbd.ko
 
-    # NOTE: Priority has to be lower than the network cmdline parsing hooks
-    # since we have to modify the some kernel parameter before.
-    inst_hook cmdline 00 "$moddir/hooks/cmdline.sh"
-    inst_hook cmdline 90 "$moddir/hooks/nbd-cmdline.sh"
-    inst_hook pre-udev 00 "$moddir/hooks/pre-udev.sh"
-    inst_hook pre-mount 10 "$moddir/hooks/pre-mount.sh"
-    inst_hook mount 10 "$moddir/hooks/mount.sh"
+    ### HOOKS
+    ## HOOK cmdline
+    # enables sysrq-shortcuts
+    inst_hook cmdline 00 "$moddir/hooks/cmdline/enable-sysrq.sh"
+
+    # expands the ip parameter in the kernel command line to
+    # make it dracut-compatible
+    # TODO: dracut still parses this incorrectly...
+    inst_hook cmdline 10 "$moddir/hooks/cmdline/expand-kcl-ip.sh"
+
+    # sets environment variables to tell dracut which device
+    # holds the future root filesystem
+    inst_hook cmdline 90 "$moddir/hooks/cmdline/mark-root-device.sh"
+
+    ## HOOK pre-udev
+    # loads the dnbd3/nbd kernel modules
+    inst_hook pre-udev 00 "$moddir/hooks/pre-udev/load-dnbd3-nbd-modules.sh"
+
+    ## HOOK pre-mount
+    # this is the configuration hook where the config stuff is wget'ed
+    inst_hook pre-mount 00 "$moddir/hooks/pre-mount/fetch-config.sh"
+
+    # this is the main hook where all the magic is triggered
+    inst_hook pre-mount 10 "$moddir/hooks/pre-mount/mount-qcow.sh"
+
+    ## HOOK mount
+    # this simply mounts the prepared /dev/root to $NEWROOT
+    # aka "the dracut way"
+    inst_hook mount 10 "$moddir/hooks/mount/mount-root-device.sh"
+
+    ## HOOK pre-pivot
+    # this checks whether we found a partition suitable for
+    # the future /tmp and if so, mounts it
+    inst_hook pre-pivot 00 "$moddir/hooks/pre-pivot/mount-tmp.sh"
+
+    ### SCRIPTS
+    # the main magic script containing all the functions needed
+    # to prepare the qcow2-based root filesystem
     inst "$moddir/scripts/setup-qcow2" /sbin/setup-qcow2
-    inst "$moddir/scripts/setup-nbdroot" /sbin/setup-nbdroot
 
+    # the script triggered by udev upon finding the right partitions
+    inst "$moddir/scripts/prepare-disks" /sbin/prepare-disks
+
+    # udev rules detecting 44, 45, 46 partitions and running
+    # 'prepare-disks' to do then format/mount/use them
+    inst "$moddir/udev/70-openslx-disk.rules" /etc/udev/rules.d/70-openslx-disk.rules
 
     # Debugging Uncomment this version if you need some useful debugging tools
     # in your iniramfs.
     inst_multiple lsblk ping ip ifconfig sshd htop tail head cat vim \
         touch sed lsmod insmod qemu-img sleep route wget find lsof strace \
-        chroot switch_root pivot_root qemu-nbd mount nbd-client fdisk
+        chroot switch_root pivot_root qemu-nbd mount nbd-client fdisk mkfs.xfs
     # Production:
     # inst_multiple insmod qemu-img qemu-nbd
     return 0
diff --git a/testModule/scripts/prepare-disks b/testModule/scripts/prepare-disks
new file mode 100755
index 00000000..2e68dd9e
--- /dev/null
+++ b/testModule/scripts/prepare-disks
@@ -0,0 +1,211 @@
+#!/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/r b/testModule/scripts/r
deleted file mode 100755
index 9b4fd4fc..00000000
--- a/testModule/scripts/r
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/usr/bin/bash
-
-echo b > /proc/sysrq-trigger
diff --git a/testModule/scripts/retry-nbdroot b/testModule/scripts/retry-nbdroot
deleted file mode 100755
index 8eb4bd27..00000000
--- a/testModule/scripts/retry-nbdroot
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-[ -f /tmp/qemu-nbd.pid ] || exit 1
-
-/sbin/nbdroot eno1 nbd:127.0.0.1:2000 /sysroot
diff --git a/testModule/scripts/setup-nbdroot b/testModule/scripts/setup-nbdroot
deleted file mode 100755
index 38f48dd4..00000000
--- a/testModule/scripts/setup-nbdroot
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/bash
-
-# exit 1 until qemu-nbd is running
-[ -f /tmp/qemu-nbd.pid ] || exit 1
-
-#
-if nbd-client --systemd-mark --persist 127.0.0.1 2000 /dev/nbd0; then
-	ln -sf /dev/nbd0 /dev/root
-	exit 0
-else
-	exit 1
-fi
diff --git a/testModule/scripts/setup-qcow2 b/testModule/scripts/setup-qcow2
index ba1ef6b1..cc74457b 100755
--- a/testModule/scripts/setup-qcow2
+++ b/testModule/scripts/setup-qcow2
@@ -2,16 +2,21 @@
 
 # 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 DNBD3_SERVER="132.230.4.1"
-declare -rg DNBD3_IMAGE="stage4/joe/centos7"
-declare -rg DNBD3_RID="4"
+declare -rg QCOW_CONTAINER="/opt/openslx/system/system.qcow2"
 #
 # END GLOBALS
 ###############################################################################
@@ -49,18 +54,22 @@ connect_dnbd3() {
 
 # helper to create the qcow2 container file using
 # DNBD3_DEVICE as the base of the filesystem
-# /run/test.qcow2 as the writable file
+# QCOW_CONTAINER as the writable file
 # (our future rootfs)
 create_qcow() {
 	# check if we already created the qcow2-container
-	[ -e /run/test.qcow2 ] && return 0
+	[ -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="$DNBD3_DEVICE",backing_fmt=qcow2 /run/test.qcow2; then
+		backing_file="$DNBD3_DEVICE",backing_fmt=qcow2 "$QCOW_CONTAINER"; then
 		warn "Failed to create qcow2-Container from $DNBD3_DEVICE"
 		emergency_shell -n "Error in $0"
-		rm -f -- /run/test.qcow2
+		rm -f -- "$QCOW_CONTAINER"
 		return 1
 	fi
 	return 0
@@ -75,7 +84,7 @@ export_qcow() {
 	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 /run/test.qcow2 &
+		/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
@@ -102,17 +111,26 @@ export_qcow() {
 	# 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 nbd-client --systemd-mark --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
 ###############################################################################
 
-###############################################################################
-# MAIN CODE
-#
-#check_dnbd3 || return 1
-connect_dnbd3 || exit 1
-create_qcow || exit 1
-export_qcow || exit 1
-
-# all good, we are done :)
-exit 0
+# No main, use functions!
diff --git a/testModule/udev/70-openslx-disk.rules b/testModule/udev/70-openslx-disk.rules
new file mode 100644
index 00000000..3f5e382f
--- /dev/null
+++ b/testModule/udev/70-openslx-disk.rules
@@ -0,0 +1,8 @@
+# GPT rules
+KERNEL=="sd?[0-9]" SUBSYSTEM=="block" ENV{ID_PART_TABLE_TYPE}=="gpt" ENV{ID_PART_ENTRY_NAME}=="OPENSLX_TMP" RUN+="/sbin/prepare-disks %E{ID_PART_ENTRY_NAME} %k"
+KERNEL=="sd?[0-9]" SUBSYSTEM=="block" ENV{ID_PART_TABLE_TYPE}=="gpt" ENV{ID_PART_ENTRY_NAME}=="OPENSLX_SYS" RUN+="/sbin/prepare-disks %E{ID_PART_ENTRY_NAME} %k"
+
+# MBR rules
+KERNEL=="sd?[0-9]" SUBSYSTEM=="block" ENV{ID_PART_TABLE_TYPE}=="dos" ENV{ID_PART_ENTRY_TYPE}=="0x44" RUN+="/sbin/prepare-disks OPENSLX_TMP %k"
+KERNEL=="sd?[0-9]" SUBSYSTEM=="block" ENV{ID_PART_TABLE_TYPE}=="dos" ENV{ID_PART_ENTRY_TYPE}=="0x46" RUN+="/sbin/prepare-disks OPENSLX_SYS %k"
+