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+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/disk-expand/README.md b/disk-expand/README.md
new file mode 100644
index 0000000..f65e6ab
--- /dev/null
+++ b/disk-expand/README.md
@@ -0,0 +1,54 @@
+## Experimental disk-expand package for GCE CentOS 6 and RHEL 6 images.
+
+This package is intended to expand the root partition up to 2TB on a GCE VM. It
+consists of several scripts from other packages that for various reasons are not
+maintained by the distros; cloud-utils-growpart, dracut-modules-growroot, and an
+upstream version of the growpart script. See below for details. This package is
+being provided on an experimental basis for GCE CentOS and RHEL 6 images only at
+this time.
+
+### Build the package
+
+A script to build the package is provided for convenience.
+`./build_package.sh /OUTPUT_DIR` will yield an rpm and an srpm in the
+defined output directory.
+
+### Package usage
+
+1. Update your distro and reboot. If there is a kernel update, you need to be
+   running the new kernel for dracut to update it properly. Alternativley, if
+   there is not a kernel update you can just install the gce-disk-expand
+   package in the next step.
+   `yum -y update ; reboot`
+1. Install the gce-disk-expand package with yum and reboot:
+   `yum -y install /PATH_TO/gce-disk-expand-el6-VER-DATE.x86_64.rpm ; reboot`
+
+Your root partition will now be expanded to the full size of your disk up to
+2TB.
+
+#### Growpart
+
+The growpart script used in this package is not from the 0.27
+cloud-utils-growpart package. There are bugs in that version of growpart,
+primarily a bug that doesn't respect 2TB disk partitions on MBR disks. This
+means that if you had a disk that was 2.1TB, you would end up with a 0.1TB
+partition instead of 2TB partition. Obviously, this is bad. The upstream
+[cloud-utils 257 release](http://bazaar.launchpad.net/~cloud-utils-dev/cloud-utils/trunk/tarball/257)
+fixes this bug and others while not introducing more bugs and dependencies in
+further upstream releases of this script. It is therefore not recommended that
+you try to use the [0.27 growpart package](http://rpmfind.net/linux/RPM/epel/6/x86_64/cloud-utils-growpart-0.27-10.el6.x86_64.html)
+from the EPEL repo.
+
+#### Dracut modules
+
+The dracut modules are taken unmodified from the [dracut-modules-growroot](http://rpmfind.net/linux/RPM/epel/6/x86_64/dracut-modules-growroot-0.20-2.el6.noarch.html)
+package in the EPEL 6 repo. The dracut module allows the partition table to be
+expanded on boot before / is mounted and prevents an additional reboot.
+
+#### The expand-root init.d script
+
+The expand-root init.d script is derived from the
+[bootstrap-vz version](https://github.com/andsens/bootstrap-vz/blob/c682dab6ec51767b6e529c1589c5630f6295953a/bootstrapvz/common/assets/init.d/expand-root)
+of this script used for Debian instances. Essentially, it just calls the proper
+filesystem expansion utility to live resize the filesystem on first boot. The
+root partition is hard coded as /dev/sda1 in this script.
diff --git a/disk-expand/build_package.sh b/disk-expand/build_package.sh
new file mode 100755
index 0000000..d40ea3d
--- /dev/null
+++ b/disk-expand/build_package.sh
@@ -0,0 +1,39 @@
+#!/bin/bash
+# Copyright 2016 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+if [[ -d $1 ]]; then
+  echo "Saving packages to $1"
+  RPM_DEST=$1
+else
+  RPM_DEST="/tmp"
+fi
+
+RPM_TOP=$(mktemp -d)
+SPEC_FILE="gce-disk-expand-el6.spec"
+
+echo "Setup"
+mkdir -p ${RPM_TOP}/SOURCES
+cp -R * ${RPM_TOP}/SOURCES
+
+echo "Building"
+rpmbuild --define "_topdir ${RPM_TOP}" -ba ${SPEC_FILE}
+
+echo "Copying rpm's to ${RPM_DEST}"
+cp ${RPM_TOP}/RPMS/x86_64/*.rpm ${RPM_DEST}
+cp ${RPM_TOP}/SRPMS/*.rpm ${RPM_DEST}
+ls -l ${RPM_DEST}/*.rpm
+
+echo "Cleaning up"
+rm -Rf ${RPM_TOP}
diff --git a/disk-expand/etc/init.d/expand-root b/disk-expand/etc/init.d/expand-root
new file mode 100755
index 0000000..aba65dd
--- /dev/null
+++ b/disk-expand/etc/init.d/expand-root
@@ -0,0 +1,21 @@
+#!/bin/bash
+### BEGIN INIT INFO
+# Provides: expand-root
+# Default-Start: 2 3 4 5
+# Description: Expand the filesystem of the mounted root volume/partition to its maximum possible size
+### END INIT INFO
+
+prog=$(basename $0)
+logger="logger -t $prog"
+
+device_path="/dev/sda1"
+
+filesystem=$(blkid -s TYPE -o value ${device_path})
+
+case $filesystem in
+  xfs)  xfs_growfs / ;;
+  ext2) resize2fs $device_path ;;
+  ext3) resize2fs $device_path ;;
+  ext4) resize2fs $device_path ;;
+  *)    $logger "The filesystem $filesystem was not recognized. Unable to expand size." ;;
+esac
diff --git a/disk-expand/gce-disk-expand-el6.spec b/disk-expand/gce-disk-expand-el6.spec
new file mode 100644
index 0000000..e8f0e12
--- /dev/null
+++ b/disk-expand/gce-disk-expand-el6.spec
@@ -0,0 +1,52 @@
+# Copyright 2016 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+Name: gce-disk-expand
+Summary: Google Compute Engine root disk expansion utilities for EL6
+Version: 0.9.0
+Release: %(date +%s).el6
+License: GPLv3, Apache Software License
+Group: System Environment/Base
+URL: https://github.com/GoogleCloudPlatform/compute-image-packages
+Requires: gawk, e2fsprogs, file, dracut, grep, util-linux, gdisk
+Conflicts: cloud-utils-growpart, cloud-utils, dracut-modules-growroot
+
+# Allow other files in the source that don't end up in the package.
+%define _unpackaged_files_terminate_build 0
+
+%description
+gce-disk-expand: Automatically resize the root partition on first boot.
+
+This package is adopted from cloud-utils, cloud-initramfs-tools, and
+cloud-utils-growpart.
+
+%install
+rm -rf $RPM_BUILD_ROOT
+mkdir -p $RPM_BUILD_ROOT
+cp -R $RPM_SOURCE_DIR/etc $RPM_BUILD_ROOT
+cp -R $RPM_SOURCE_DIR/usr $RPM_BUILD_ROOT
+
+%files
+%attr(755,root,root) /etc/init.d/expand-root
+%attr(755,root,root) /usr/bin/growpart
+%attr(755,root,root) /usr/share/dracut/modules.d/50growroot/growroot-dummy.sh
+%attr(755,root,root) /usr/share/dracut/modules.d/50growroot/growroot.sh
+%attr(755,root,root) /usr/share/dracut/modules.d/50growroot/install
+
+%post
+dracut --force
+chkconfig --level 2345 expand-root on
+
+%postun
+dracut --force
+chkconfig expand-root off
diff --git a/disk-expand/usr/bin/growpart b/disk-expand/usr/bin/growpart
new file mode 100755
index 0000000..ce3b787
--- /dev/null
+++ b/disk-expand/usr/bin/growpart
@@ -0,0 +1,629 @@
+#!/bin/sh
+#    Copyright (C) 2011 Canonical Ltd.
+#    Copyright (C) 2013 Hewlett-Packard Development Company, L.P.
+#
+#    Authors: Scott Moser <smoser@canonical.com>
+#             Juerg Haefliger <juerg.haefliger@hp.com>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, version 3 of the License.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# the fudge factor. if its within this many 512 byte sectors, dont bother
+FUDGE=${GROWPART_FUDGE:-$((20*1024))}
+TEMP_D=""
+RESTORE_FUNC=""
+RESTORE_HUMAN=""
+VERBOSITY=0
+DISK=""
+PART=""
+PT_UPDATE=false
+DRY_RUN=0
+
+MBR_CHS=""
+MBR_BACKUP=""
+GPT_BACKUP=""
+_capture=""
+
+error() {
+	echo "$@" 1>&2
+}
+
+fail() {
+	[ $# -eq 0 ] || echo "FAILED:" "$@"
+	exit 2
+}
+
+nochange() {
+	echo "NOCHANGE:" "$@"
+	exit 1
+}
+
+changed() {
+	echo "CHANGED:" "$@"
+	exit 0
+}
+
+change() {
+	echo "CHANGE:" "$@"
+	exit 0
+}
+
+cleanup() {
+	if [ -n "${RESTORE_FUNC}" ]; then
+		error "***** WARNING: Resize failed, attempting to revert ******"
+		if ${RESTORE_FUNC} ; then
+			error "***** Appears to have gone OK ****"
+		else
+			error "***** FAILED! ******"
+			if [ -n "${RESTORE_HUMAN}" -a -f "${RESTORE_HUMAN}" ]; then
+				error "**** original table looked like: ****"
+				cat "${RESTORE_HUMAN}" 1>&2
+			else
+				error "We seem to have not saved the partition table!"
+			fi
+		fi
+	fi
+	[ -z "${TEMP_D}" -o ! -d "${TEMP_D}" ] || rm -Rf "${TEMP_D}"
+}
+
+debug() {
+	local level=${1}
+	shift
+	[ "${level}" -gt "${VERBOSITY}" ] && return
+	if [ "${DEBUG_LOG}" ]; then
+		echo "$@" >>"${DEBUG_LOG}"
+	else
+		error "$@"
+	fi
+}
+
+debugcat() {
+	local level="$1"
+	shift;
+	[ "${level}" -gt "$VERBOSITY" ] && return
+	if [ "${DEBUG_LOG}" ]; then
+		cat "$@" >>"${DEBUG_LOG}"
+	else
+		cat "$@" 1>&2
+	fi
+}
+
+mktemp_d() {
+	# just a mktemp -d that doens't need mktemp if its not there.
+	_RET=$(mktemp -d "${TMPDIR:-/tmp}/${0##*/}.XXXXXX" 2>/dev/null) &&
+		return
+	_RET=$(umask 077 && t="${TMPDIR:-/tmp}/${0##*/}.$$" &&
+		mkdir "${t}" &&	echo "${t}")
+	return
+}
+
+Usage() {
+	cat <<EOF
+${0##*/} disk partition
+   rewrite partition table so that partition takes up all the space it can
+   options:
+    -h | --help       print Usage and exit
+         --fudge F    if part could be resized, but change would be
+                      less than 'F', do not resize (default: ${FUDGE})
+    -N | --dry-run    only report what would be done, show new 'sfdisk -d'
+    -v | --verbose    increase verbosity / debug
+    -u | --update  R  update the the kernel partition table info after growing
+                      this requires kernel support and 'partx --update'
+                      R is one of:
+                       - 'auto'  : [default] update partition if possible
+                       - 'force' : try despite sanity checks (fail on failure)
+                       - 'off'   : do not attempt
+                       - 'on'    : fail if sanity checks indicate no support
+
+   Example:
+    - ${0##*/} /dev/sda 1
+      Resize partition 1 on /dev/sda
+EOF
+}
+
+bad_Usage() {
+	Usage 1>&2
+	error "$@"
+	exit 2
+}
+
+mbr_restore() {
+	sfdisk --no-reread "${DISK}" ${MBR_CHS} -I "${MBR_BACKUP}"
+}
+
+sfdisk_worked_but_blkrrpart_failed() {
+	local ret="$1" output="$2"
+	# exit code found was just 1, but dont insist on that
+	#[ $ret -eq 1 ] || return 1
+	# Successfully wrote the new partition table
+	grep -qi "Success.* wrote.* new.* partition" "$output" &&
+		grep -qi "BLKRRPART: Device or resource busy" "$output"
+	return
+}
+
+mbr_resize() {
+	local humanpt="${TEMP_D}/recovery"
+	local mbr_backup="${TEMP_D}/orig.save"
+
+	local change_out=${TEMP_D}/change.out
+	local dump_out=${TEMP_D}/dump.out
+	local new_out=${TEMP_D}/new.out
+	local dump_mod=${TEMP_D}/dump.mod
+	local tmp="${TEMP_D}/tmp.out"
+	local err="${TEMP_D}/err.out"
+	local mbr_max_512="4294967296"
+
+	local _devc cyl _w1 heads _w2 sectors _w3 tot dpart
+	local pt_start pt_size pt_end max_end new_size change_info
+
+	# --show-pt-geometry outputs something like
+	#     /dev/sda: 164352 cylinders, 4 heads, 32 sectors/track
+	rqe sfd_geom sfdisk "${DISK}" --show-pt-geometry >"${tmp}" &&
+		read _devc cyl _w1 heads _w2 sectors _w3 <"${tmp}" &&
+		MBR_CHS="-C ${cyl} -H ${heads} -S ${sectors}" ||
+		fail "failed to get CHS from ${DISK}"
+
+	tot=$((${cyl}*${heads}*${sectors}))
+
+	debug 1 "geometry is ${MBR_CHS}. total size=${tot}"
+	[ "$tot" -gt "$mbr_max_512" ] &&
+		debug 1 "WARN: disk is larger than 2TB. additional space will go unused."
+
+	rqe sfd_dump sfdisk ${MBR_CHS} --unit=S --dump "${DISK}" \
+		>"${dump_out}" ||
+		fail "failed to dump sfdisk info for ${DISK}"
+	RESTORE_HUMAN="$dump_out"
+
+	{
+		echo "## sfdisk ${MBR_CHS} --unit=S --dump ${DISK}"
+		cat "${dump_out}"
+	}  >"$humanpt"
+
+	[ $? -eq 0 ] || fail "failed to save sfdisk -d output"
+	RESTORE_HUMAN="$humanpt"
+
+	debugcat 1 "$humanpt"
+
+	sed -e 's/,//g; s/start=/start /; s/size=/size /' "${dump_out}" \
+		>"${dump_mod}" ||
+		fail "sed failed on dump output"
+
+	dpart="${DISK}${PART}" # disk and partition number
+	if [ -b "${DISK}p${PART}" -a "${DISK%[0-9]}" != "${DISK}" ]; then
+		# for block devices that end in a number (/dev/nbd0)
+		# the partition is "<name>p<partition_number>" (/dev/nbd0p1)
+		dpart="${DISK}p${PART}"
+	elif [ "${DISK#/dev/loop[0-9]}" != "${DISK}" ]; then
+		# for /dev/loop devices, sfdisk output will be <name>p<number>
+		# format also, even though there is not a device there.
+		dpart="${DISK}p${PART}"
+	fi
+
+	pt_start=$(awk '$1 == pt { print $4 }' "pt=${dpart}" <"${dump_mod}") &&
+		pt_size=$(awk '$1 == pt { print $6 }' "pt=${dpart}" <"${dump_mod}") &&
+		[ -n "${pt_start}" -a -n "${pt_size}" ] &&
+		pt_end=$((${pt_size}+${pt_start})) ||
+		fail "failed to get start and end for ${dpart} in ${DISK}"
+
+	# find the minimal starting location that is >= pt_end 
+	max_end=$(awk '$3 == "start" { if($4 >= pt_end && $4 < min)
+		{ min = $4 } } END { printf("%s\n",min); }' \
+		min=${tot} pt_end=${pt_end} "${dump_mod}") &&
+		[ -n "${max_end}" ] ||
+		fail "failed to get max_end for partition ${PART}"
+
+	if [ "$max_end" -gt "$mbr_max_512" ]; then
+		max_end=$mbr_max_512;
+	fi
+
+	debug 1 "max_end=${max_end} tot=${tot} pt_end=${pt_end}" \
+		"pt_start=${pt_start} pt_size=${pt_size}"
+	[ $((${pt_end})) -eq ${max_end} ] &&
+		nochange "partition ${PART} is size ${pt_size}. it cannot be grown"
+	[ $((${pt_end}+${FUDGE})) -gt ${max_end} ] &&
+		nochange "partition ${PART} could only be grown by" \
+		"$((${max_end}-${pt_end})) [fudge=${FUDGE}]"
+
+	# now, change the size for this partition in ${dump_out} to be the
+	# new size
+	new_size=$((${max_end}-${pt_start}))
+	sed "\|^\s*${dpart} |s/${pt_size},/${new_size},/" "${dump_out}" \
+		>"${new_out}" ||
+		fail "failed to change size in output"
+
+	change_info="partition=${PART} start=${pt_start} old: size=${pt_size} end=${pt_end} new: size=${new_size},end=${max_end}"
+	if [ ${DRY_RUN} -ne 0 ]; then
+		echo "CHANGE: ${change_info}"
+		{
+			echo "# === old sfdisk -d ==="
+			cat "${dump_out}"
+			echo "# === new sfdisk -d ==="
+			cat "${new_out}"
+		} 1>&2
+		exit 0
+	fi
+
+	MBR_BACKUP="${mbr_backup}"
+	LANG=C sfdisk --no-reread "${DISK}" ${MBR_CHS} --force \
+		-O "${mbr_backup}" <"${new_out}" >"${change_out}" 2>&1
+	ret=$?
+	[ $ret -eq 0 ] || RESTORE_FUNC="mbr_restore"
+
+	if [ $ret -eq 0 ]; then
+		:
+	elif $PT_UPDATE &&
+		sfdisk_worked_but_blkrrpart_failed "$ret" "${change_out}"; then
+		# if the command failed, but it looks like only because
+		# the device was busy and we have pt_update, then go on
+		debug 1 "sfdisk failed, but likely only because of blkrrpart"
+	else
+		error "attempt to resize ${DISK} failed. sfdisk output below:"
+		sed 's,^,| ,' "${change_out}" 1>&2
+		fail "failed to resize"
+	fi
+
+	rq pt_update pt_update "$DISK" "$PART" ||
+		fail "pt_resize failed"
+
+	RESTORE_FUNC=""
+
+	changed "${change_info}"
+
+	# dump_out looks something like:
+	## partition table of /tmp/out.img
+	#unit: sectors
+	#
+	#/tmp/out.img1 : start=        1, size=    48194, Id=83
+	#/tmp/out.img2 : start=    48195, size=   963900, Id=83
+	#/tmp/out.img3 : start=  1012095, size=   305235, Id=82
+	#/tmp/out.img4 : start=  1317330, size=   771120, Id= 5
+	#/tmp/out.img5 : start=  1317331, size=   642599, Id=83
+	#/tmp/out.img6 : start=  1959931, size=    48194, Id=83
+	#/tmp/out.img7 : start=  2008126, size=    80324, Id=83
+}
+
+gpt_restore() {
+	sgdisk -l "${GPT_BACKUP}" "${DISK}"
+}
+
+gpt_resize() {
+	GPT_BACKUP="${TEMP_D}/pt.backup"
+
+	local pt_info="${TEMP_D}/pt.info"
+	local pt_pretend="${TEMP_D}/pt.pretend"
+	local pt_data="${TEMP_D}/pt.data"
+	local out="${TEMP_D}/out"
+
+	local dev="disk=${DISK} partition=${PART}"
+
+	local pt_start pt_end pt_size last pt_max code guid name new_size
+	local old new change_info
+	
+	# Dump the original partition information and details to disk. This is
+	# used in case something goes wrong and human interaction is required
+	# to revert any changes.
+	rqe sgd_info sgdisk "--info=${PART}" --print "${DISK}" >"${pt_info}" ||
+		fail "${dev}: failed to dump original sgdisk info"
+	RESTORE_HUMAN="${pt_info}"
+
+	debug 1 "$dev: original sgdisk info:"
+	debugcat 1 "${pt_info}"
+
+	# Pretend to move the backup GPT header to the end of the disk and dump
+	# the resulting partition information. We use this info to determine if
+	# we have to resize the partition.
+	rqe sgd_pretend sgdisk --pretend --move-second-header \
+		--print "${DISK}" >"${pt_pretend}" ||
+		fail "${dev}: failed to dump pretend sgdisk info"
+
+	debug 1 "$dev: pretend sgdisk info"
+	debugcat 1 "${pt_pretend}"
+
+	# Extract the partition data from the pretend dump
+	awk 'found { print } ; $1 == "Number" { found = 1 }' \
+		"${pt_pretend}" >"${pt_data}" ||
+		fail "${dev}: failed to parse pretend sgdisk info"
+
+	# Get the start and end sectors of the partition to be grown
+	pt_start=$(awk '$1 == '"${PART}"' { print $2 }' "${pt_data}") &&
+		[ -n "${pt_start}" ] ||
+		fail "${dev}: failed to get start sector"
+	pt_end=$(awk '$1 == '"${PART}"' { print $3 }' "${pt_data}") &&
+		[ -n "${pt_end}" ] ||
+		fail "${dev}: failed to get end sector"
+	pt_size="$((${pt_end} - ${pt_start}))"
+
+	# Get the last usable sector
+	last=$(awk '/last usable sector is/ { print $NF }' \
+		"${pt_pretend}") && [ -n "${last}" ] ||
+		fail "${dev}: failed to get last usable sector"
+
+	# Find the minimal start sector that is >= pt_end 
+	pt_max=$(awk '{ if ($2 >= pt_end && $2 < min) { min = $2 } } END \
+		{ print min }' min="${last}" pt_end="${pt_end}" \
+		"${pt_data}") && [ -n "${pt_max}" ] ||
+		fail "${dev}: failed to find max end sector"
+
+	debug 1 "${dev}: pt_start=${pt_start} pt_end=${pt_end}" \
+		"pt_size=${pt_size} pt_max=${pt_max} last=${last}"
+
+	# Check if the partition can be grown
+	[ "${pt_end}" -eq "${pt_max}" ] &&
+		nochange "${dev}: size=${pt_size}, it cannot be grown"
+	[ "$((${pt_end} + ${FUDGE}))" -gt "${pt_max}" ] &&
+		nochange "${dev}: could only be grown by" \
+		"$((${pt_max} - ${pt_end})) [fudge=${FUDGE}]"
+
+	# The partition can be grown if we made it here. Get some more info
+	# about it so we can do it properly.
+	# FIXME: Do we care about the attribute flags?
+	code=$(awk '/^Partition GUID code:/ { print $4 }' "${pt_info}")
+	guid=$(awk '/^Partition unique GUID:/ { print $4 }' "${pt_info}")
+	name=$(awk '/^Partition name:/ { gsub(/'"'"'/, "") ; \
+		if (NF >= 3) print substr($0, index($0, $3)) }' "${pt_info}")
+	[ -n "${code}" -a -n "${guid}" ] ||
+		fail "${dev}: failed to parse sgdisk details"
+
+	debug 1 "${dev}: code=${code} guid=${guid} name='${name}'"
+	local wouldrun=""
+	[ "$DRY_RUN" -ne 0 ] && wouldrun="would-run"
+
+	# Calculate the new size of the partition
+	new_size=$((${pt_max} - ${pt_start}))
+	old="old: size=${pt_size},end=${pt_end}"
+	new="new: size=${new_size},end=${pt_max}"
+	change_info="${dev}: start=${pt_start} ${old} ${new}"
+	
+	# Backup the current partition table, we're about to modify it
+	rq sgd_backup $wouldrun sgdisk "--backup=${GPT_BACKUP}" "${DISK}" ||
+		fail "${dev}: failed to backup the partition table"
+
+	# Modify the partition table. We do it all in one go (the order is
+	# important!):
+	#  - move the GPT backup header to the end of the disk
+	#  - delete the partition
+	#  - recreate the partition with the new size
+	#  - set the partition code
+	#  - set the partition GUID
+	#  - set the partition name
+	rq sgdisk_mod $wouldrun sgdisk --move-second-header "--delete=${PART}" \
+		"--new=${PART}:${pt_start}:${pt_max}" \
+		"--typecode=${PART}:${code}" \
+		"--partition-guid=${PART}:${guid}" \
+		"--change-name=${PART}:${name}" "${DISK}" &&
+		rq pt_update $wouldrun pt_update "$DISK" "$PART" || {
+		RESTORE_FUNC=gpt_restore
+		fail "${dev}: failed to repartition"
+	}
+
+	# Dry run
+	[ "${DRY_RUN}" -ne 0 ] && change "${change_info}"
+
+	changed "${change_info}"
+}
+
+kver_to_num() {
+	local kver="$1" maj="" min="" mic="0"
+	kver=${kver%%-*}
+	maj=${kver%%.*}
+	min=${kver#${maj}.}
+	min=${min%%.*}
+	mic=${kver#${maj}.${min}.}
+	[ "$kver" = "$mic" ] && mic=0
+	_RET=$(($maj*1000*1000+$min*1000+$mic))
+}
+
+kver_cmp() {
+	local op="$2" n1="" n2=""
+	kver_to_num "$1"
+	n1="$_RET"
+	kver_to_num "$3"
+	n2="$_RET"
+	[ $n1 $op $n2 ]
+}
+
+rq() {
+	# runquieterror(label, command)
+	# gobble stderr of a command unless it errors
+	local label="$1" ret="" efile=""
+	efile="$TEMP_D/$label.err"
+	shift;
+
+	local rlabel="running"
+	[ "$1" = "would-run" ] && rlabel="would-run" && shift
+
+	local cmd="" x=""
+	for x in "$@"; do
+		[ "${x#* }" != "$x" -o "${x#* \"}" != "$x" ] && x="'$x'"
+		cmd="$cmd $x"
+	done
+	cmd=${cmd# }
+
+	debug 2 "$rlabel[$label][$_capture]" "$cmd"
+	[ "$rlabel" = "would-run" ] && return 0
+
+	if [ "${_capture}" = "erronly" ]; then
+		"$@" 2>"$TEMP_D/$label.err"
+		ret=$?
+	else
+		"$@" >"$TEMP_D/$label.err" 2>&1
+		ret=$?
+	fi
+	if [ $ret -ne 0 ]; then
+		error "failed [$label:$ret]" "$@"
+ 		cat "$efile" 1>&2
+	fi
+	return $ret
+}
+
+rqe() {
+	local _capture="erronly"
+	rq "$@"
+}
+
+verify_ptupdate() {
+	local input="$1" found="" reason="" kver=""
+
+	# we can always satisfy 'off'
+	if [ "$input" = "off" ]; then
+ 		_RET="false";
+		return 0;
+	fi
+
+	if command -v partx >/dev/null 2>&1; then
+		local out="" ret=0
+		out=$(partx --help 2>&1)
+		ret=$?
+		if [ $ret -eq 0 ]; then
+			echo "$out" | grep -q -- --update || {
+				reason="partx has no '--update' flag in usage."
+				found="off"
+			}
+		else
+			reason="'partx --help' returned $ret. assuming it is old."
+			found="off"
+		fi
+	else
+		reason="no 'partx' command"
+		found="off"
+	fi
+
+	if [ -z "$found" ]; then
+		if [ "$(uname)" != "Linux" ]; then
+			reason="Kernel is not Linux per uname."
+			found="off"
+		fi
+	fi
+
+	if [ -z "$found" ]; then
+		kver=$(uname -r) || debug 1 "uname -r failed!"
+
+		if ! kver_cmp "${kver-0.0.0}" -ge 3.8.0; then
+			reason="Kernel '$kver' < 3.8.0."
+			found="off"
+		fi
+	fi
+
+	if [ -z "$found" ]; then
+		_RET="true"
+		return 0
+	fi
+
+	case "$input" in
+		on) error "$reason"; return 1;;
+		auto)
+			_RET="false";
+			debug 1 "partition update disabled: $reason"
+			return 0;;
+		force)
+			_RET="true"
+			error "WARNING: ptupdate forced on even though: $reason"
+			return 0;;
+	esac
+	error "unknown input '$input'";
+	return 1;
+}
+
+pt_update() {
+	local dev="$1" part="$2" update="${3:-$PT_UPDATE}"
+	if ! $update; then
+		return 0
+	fi
+	# partx only works on block devices (do not run on file)
+	[ -b "$dev" ] || return 0
+	partx --update "$part" "$dev"
+}
+
+has_cmd() {
+	command -v "${1}" >/dev/null 2>&1
+}
+
+pt_update="auto"
+while [ $# -ne 0 ]; do
+	cur=${1}
+	next=${2}
+	case "$cur" in
+		-h|--help)
+			Usage
+			exit 0
+			;;
+		--fudge)
+			FUDGE=${next}
+			shift
+			;;
+		-N|--dry-run)
+			DRY_RUN=1
+			;;
+		-u|--update|--update=*)
+			if [ "${cur#--update=}" != "$cur" ]; then
+				next="${cur#--update=}"
+			else
+				shift
+			fi
+			case "$next" in
+				off|auto|force|on) pt_update=$next;;
+				*) fail "unknown --update option: $next";;
+			esac
+			;;
+		-v|--verbose)
+			VERBOSITY=$(($VERBOSITY+1))
+			;;
+		--)
+			shift
+			break
+			;;
+		-*)
+			fail "unknown option ${cur}"
+			;;
+		*)
+			if [ -z "${DISK}" ]; then
+				DISK=${cur}
+			else
+				[ -z "${PART}" ] || fail "confused by arg ${cur}"
+				PART=${cur}
+			fi
+			;;
+	esac
+	shift
+done
+
+[ -n "${DISK}" ] || bad_Usage "must supply disk and partition-number"
+[ -n "${PART}" ] || bad_Usage "must supply partition-number"
+
+has_cmd "sfdisk" || fail "sfdisk not found"
+
+[ -e "${DISK}" ] || fail "${DISK}: does not exist"
+
+[ "${PART#*[!0-9]}" = "${PART}" ] || fail "partition-number must be a number"
+
+verify_ptupdate "$pt_update" || fail
+PT_UPDATE=$_RET
+
+debug 1 "update-partition set to $PT_UPDATE"
+
+mktemp_d && TEMP_D="${_RET}" || fail "failed to make temp dir"
+trap cleanup EXIT
+
+# get the ID of the first partition to determine if it's MBR or GPT
+id=$(sfdisk --id --force "${DISK}" 1 2>/dev/null) ||
+	fail "unable to determine partition type"
+
+if [ "${id}" = "ee" ] ; then
+	has_cmd "sgdisk" || fail "GPT partition found but no sgdisk"
+	debug 1 "found GPT partition table (id = ${id})"
+	gpt_resize
+else
+	debug 1 "found MBR partition table (id = ${id})"
+	mbr_resize
+fi
+
+# vi: ts=4 noexpandtab
diff --git a/disk-expand/usr/share/dracut/modules.d/50growroot/growroot-dummy.sh b/disk-expand/usr/share/dracut/modules.d/50growroot/growroot-dummy.sh
new file mode 100755
index 0000000..25bed15
--- /dev/null
+++ b/disk-expand/usr/share/dracut/modules.d/50growroot/growroot-dummy.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+# Dummy script, to make sure systemd executes the cmdline stage (which exports
+# the 'root' variable required by growroot)
diff --git a/disk-expand/usr/share/dracut/modules.d/50growroot/growroot.sh b/disk-expand/usr/share/dracut/modules.d/50growroot/growroot.sh
new file mode 100755
index 0000000..e09c809
--- /dev/null
+++ b/disk-expand/usr/share/dracut/modules.d/50growroot/growroot.sh
@@ -0,0 +1,89 @@
+#!/bin/sh
+
+# Environment variables that this script relies upon:
+# - root
+
+_info() {
+        echo "growroot: $*"
+}
+
+_warning() {
+        echo "growroot Warning: $*" >&2
+}
+
+# This will drop us into an emergency shell
+_fatal() {
+        echo "growroot Fatal: $*" >&2
+        exit 1
+}
+
+_growroot() {
+        # Remove 'block:' prefix and find the root device
+        rootdev=$(readlink -f "${root#block:}")
+        if [ -z "${rootdev}" ] ; then
+                _warning "unable to find root device"
+                return
+        fi
+
+        # If the basename of the root device (ie 'xvda1', 'sda1', 'vda') exists
+        # in /sys/block/ then it is a block device, not a partition
+        if [ -e "/sys/block/${rootdev##*/}" ] ; then
+                _info "${rootdev} is not a partition"
+                return
+        fi
+
+        # Check if the root device is a partition (name ends with a digit)
+        if [ "${rootdev%[0-9]}" = "${rootdev}" ] ; then
+                _warning "${rootdev} is not a partition"
+                return
+        fi
+
+        # Remove all numbers from the end of rootdev to get the rootdisk and
+        # partition number
+        rootdisk=${rootdev}
+        while [ "${rootdisk%[0-9]}" != "${rootdisk}" ] ; do
+                rootdisk=${rootdisk%[0-9]}
+        done
+        partnum=${rootdev#${rootdisk}}
+
+        # Check if we need to strip a trailing 'p' from the rootdisk name (for
+        # device names like /dev/mmcblk0p)
+        tmp=${rootdisk%[0-9]p}
+        if [ "${#tmp}" != "${#rootdisk}" ] ; then
+                rootdisk=${rootdisk%p}
+        fi
+
+        # Do a growpart dry run and exit if it fails or doesn't have anything
+        # to do
+        if ! out=$(growpart --dry-run "${rootdisk}" "${partnum}") ; then
+                _info "${out}"
+                return
+        fi
+
+        # Wait for any of the initial udev events to finish otherwise growpart
+        # might fail
+        udevadm settle --timeout=30
+
+        # Resize the root partition
+        if out=$(growpart --update off "${rootdisk}" "${partnum}" 2>&1) ; then
+                _info "${out}"
+        else
+                _warning "${out}"
+                _warning "growpart failed"
+        fi
+
+        # Wait for the partition re-read events to complete so that the root
+        # partition is available for mounting
+        udevadm settle --timeout=30
+
+        # Add the root partition if it didn't come back on its own
+        if ! [ -e "${rootdev}" ] ; then
+                partx --add --nr "${partnum}" "${rootdisk}" || \
+                        _warning "failed to add root device ${rootdev}"
+                udevadm settle --timeout=30
+        fi
+}
+
+_growroot
+
+# vi: ts=4 noexpandtab
diff --git a/disk-expand/usr/share/dracut/modules.d/50growroot/install b/disk-expand/usr/share/dracut/modules.d/50growroot/install
new file mode 100755
index 0000000..70df2a8
--- /dev/null
+++ b/disk-expand/usr/share/dracut/modules.d/50growroot/install
@@ -0,0 +1,12 @@
+#!/bin/bash
+# Dracut install script for EL6
+
+inst_hook cmdline 99 "$moddir/growroot-dummy.sh"
+inst_hook pre-mount 99 "$moddir/growroot.sh"
+
+dracut_install awk
+dracut_install growpart
+dracut_install partx
+dracut_install readlink
+dracut_install sfdisk
+dracut_install sgdisk