devstack_custom/tools/xen/scripts/mkxva
2011-10-26 23:36:25 -07:00

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#!/bin/bash
#
# Copyright (c) 2011 Citrix Systems, Inc.
# Copyright 2011 OpenStack LLC.
# 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.
#
set -eu
set -o xtrace
VBOX_IMG=/output/packages/vbox-img
usage() {
cat >&2 <<EOF
$0 -o <output filenames> -t <types> -x <xml files> <fs-staging-dir> <fs-size-MiB> <tmpdir>
-o: Colon-separated list of output filenames (one for each type).
-p: Create a disk label and partition within the output image
-t: Colon-separated list of types of output file. xva and ovf supported.
-x: XML filenames (one for each type)
EOF
exit 1
}
# parse cmdline
OPT_USE_PARTITION=
OPT_TYPES=
OPT_OUTPUT_FILES=
OPT_XML_FILES=
while getopts o:pt:x: o
do case "$o" in
o) OPT_OUTPUT_FILES=$(echo "$OPTARG" | sed -e 's/\s*:\s*/ /g')
;;
p) OPT_USE_PARTITION=1
;;
t) OPT_TYPES=$(echo "$OPTARG" | sed -e 's/\s*:\s*/ /g')
;;
x) OPT_XML_FILES=$(echo "$OPTARG" | sed -e 's/\s*:\s*/ /g')
;;
[?]) usage
;;
esac
done
shift $((OPTIND-1))
[ $# -ne 3 ] && usage
FS_STAGING="$1"
FS_SIZE_MIB="$2"
TMPDIR="$3"
if [ "$UID" = "0" ]
then
SUDO=
else
SUDO=sudo
fi
if [ "$FS_SIZE_MIB" = "0" ]
then
# Just create a dummy file. This allows developers to bypass bits of
# the build by setting the size to 0.
touch $OPT_OUTPUT_FILES
exit 0
fi
# create temporary files and dirs
FS_TMPFILE=$(mktemp "$TMPDIR/mkxva-fsimg-XXXXX")
XVA_TARBALL_STAGING=$(mktemp -d "$TMPDIR/mkxva-tarball-staging-XXXXX")
OVF_STAGING=$(mktemp -d "$TMPDIR/mkxva-ovf-staging-XXXXX")
# Find udevsettle and udevtrigger on this installation
if [ -x "/sbin/udevsettle" ] ; then
UDEVSETTLE="/sbin/udevsettle --timeout=30"
elif [ -x "/sbin/udevadm" ] ; then
UDEVSETTLE='/sbin/udevadm settle'
else
UDEVSETTLE='/bin/true'
fi
if [ -x "/sbin/udevtrigger" ] ; then
UDEVTRIGGER=/sbin/udevtrigger
elif [ -x "/sbin/udevadm" ] ; then
UDEVTRIGGER='/sbin/udevadm trigger'
else
UDEVTRIGGER=
fi
# CLEAN_ variables track devices and mounts that must be taken down
# no matter how the script exits. Loop devices are vulnerable to
# exhaustion so we make every effort to remove them
CLEAN_KPARTX=
CLEAN_LOSETUP=
CLEAN_MOUNTPOINT=
cleanup_devices () {
if [ -n "$CLEAN_MOUNTPOINT" ] ; then
echo "Mountpoint $CLEAN_MOUNTPOINT removed on abnormal exit"
$SUDO umount "$CLEAN_MOUNTPOINT" || echo "umount failed"
rmdir "$CLEAN_MOUNTPOINT" || echo "rmdir failed"
fi
if [ -n "$CLEAN_KPARTX" ] ; then
echo "kpartx devices for $CLEAN_KPARTX removed on abnormal exit"
$SUDO kpartx -d "$CLEAN_KPARTX" || echo "kpartx -d failed"
fi
if [ -n "$CLEAN_LOSETUP" ] ; then
echo "Loop device $CLEAN_LOSETUP removed on abnormal exit"
$SUDO losetup -d "$CLEAN_LOSETUP" # Allow losetup errors to propagate
fi
}
trap "cleanup_devices" EXIT
make_fs_inner () {
local staging="$1"
local output="$2"
local options="$3"
CLEAN_MOUNTPOINT=$(mktemp -d "$TMPDIR/mkfs-XXXXXX")
# copy staging dir contents to fs image
$SUDO mount $options "$output" "$CLEAN_MOUNTPOINT"
$SUDO tar -C "$staging" -c . | tar -C "$CLEAN_MOUNTPOINT" -x
$SUDO umount "$CLEAN_MOUNTPOINT"
rmdir "$CLEAN_MOUNTPOINT"
CLEAN_MOUNTPOINT=
}
# Turn a staging dir into an ext3 filesystem within a partition
make_fs_in_partition () {
local staging="$1"
local output="$2"
# create new empty disk
dd if=/dev/zero of="$output" bs=1M count=$FS_SIZE_MIB
# Set up a loop device on the empty disk image
local loopdevice=$($SUDO losetup -f)
$SUDO losetup "$loopdevice" "$output"
CLEAN_LOSETUP="$loopdevice"
# Create a partition table and single partition.
# Start partition at sector 63 to allow space for grub
cat <<EOF
Errors from sfdisk below are expected because the new disk is uninitialised
Expecting: sfdisk: ERROR: sector 0 does not have an msdos signature
Expecting: /dev/loop0: unrecognized partition table type
EOF
$SUDO sfdisk -uS "$CLEAN_LOSETUP" <<EOF
63 - - *
EOF
# kpartx creates a device for the new partition
# in the form /dev/mapper/loop1p1
$SUDO kpartx -av "$CLEAN_LOSETUP"
CLEAN_KPARTX="$CLEAN_LOSETUP"
# Wait for the device to appear
$UDEVTRIGGER
$UDEVSETTLE || echo "udev settle command return code non-zero"
# Infer the name of the partition device
local partition="${CLEAN_LOSETUP/dev/dev/mapper}p1"
# Set permissive privileges on the device
$SUDO chmod 0777 "$partition"
# Make an ext3 filesystem on the partition
/sbin/mkfs.ext3 -I 128 -m0 -F "$partition"
/sbin/e2label "$partition" vpxroot
make_fs_inner "$staging" "$partition" ""
# Now run grub on the image we've created
CLEAN_MOUNTPOINT=$(mktemp -d "$TMPDIR/mkfs-XXXXXX")
# copy Set up[ grub files prior to installing grub within the image
$SUDO mount "$partition" "$CLEAN_MOUNTPOINT"
$SUDO cp $CLEAN_MOUNTPOINT/usr/share/grub/i386-redhat/* "$CLEAN_MOUNTPOINT/boot/grub"
kernel_version=$($SUDO chroot "$CLEAN_MOUNTPOINT" rpm -qv kernel | sed -e 's/kernel-//')
kernel_version_xen=$($SUDO chroot "$CLEAN_MOUNTPOINT" rpm -qv kernel-xen | sed -e 's/kernel-xen-//')
$SUDO cat > "$CLEAN_MOUNTPOINT/boot/grub/grub.conf" <<EOF
default 0
timeout 2
title vmlinuz-$kernel_version (HVM)
root (hd0,0)
kernel /boot/vmlinuz-$kernel_version ro root=LABEL=vpxroot
initrd /boot/initrd-$kernel_version.img
title vmlinuz-${kernel_version_xen}xen (PV)
root (hd0,0)
kernel /boot/vmlinuz-${kernel_version_xen}xen ro root=LABEL=vpxroot console=xvc0
initrd /boot/initrd-${kernel_version_xen}xen.img
EOF
$SUDO umount "$CLEAN_MOUNTPOINT"
CLEAN_MOUNTPOINT=
# Grub expects a disk with name /dev/xxxx with a first partition
# named /dev/xxxx1, so we give it what it wants using symlinks
# Note: /dev is linked to the real /dev of the build machine, so
# must be cleaned up
local disk_name="/dev/osxva$$bld"
local disk_part1_name="${disk_name}1"
rm -f "$disk_name"
rm -f "$disk_part1_name"
ln -s "$CLEAN_LOSETUP" "$disk_name"
ln -s "$partition" "$disk_part1_name"
# Feed commands into the grub shell to setup the disk
grub --no-curses --device-map=/dev/null <<EOF
device (hd0) $disk_name
setup (hd0) (hd0,0)
quit
EOF
# Cleanup
rm -f "$disk_name"
rm -f "$disk_part1_name"
$SUDO kpartx -dv "$CLEAN_KPARTX"
CLEAN_KPARTX=
$SUDO losetup -d "$CLEAN_LOSETUP"
CLEAN_LOSETUP=
}
# turn a staging dir into an ext3 filesystem image
make_fs () {
local staging="$1"
local output="$2"
# create new empty fs
dd if=/dev/zero of="$output" bs=1M count=0 seek=$FS_SIZE_MIB
/sbin/mkfs.ext3 -m0 -F "$output"
/sbin/e2label "$output" vpxroot
make_fs_inner "$staging" "$output" "-oloop"
}
# split a virtual disk image into the format expected inside an xva file
splitvdi () {
local diskimg="$1"
local outputdir="$2"
local rio="$3"
local n_bytes=$(stat --printf=%s "$diskimg")
local n_meg=$((($n_bytes+$((1024*1024 -1)))/$((1024*1024))))
local i=0
while [ $i -lt $n_meg ] ; do
if [ $rio -eq 0 ] ; then
local file="$outputdir"/chunk-$(printf "%08d" $i)
dd if="$diskimg" of="$file" skip=$i bs=1M count=1 2>/dev/null
gzip "$file"
else
local file="$outputdir"/$(printf "%08d" $i)
dd if="$diskimg" of="$file" skip=$i bs=1M count=1 2>/dev/null
local chksum=$(sha1sum -b "$file")
echo -n "${chksum/ */}" > "$file.checksum"
fi
i=$(($i + 1))
done
}
if [ -n "$OPT_USE_PARTITION" ] ; then
make_fs_in_partition "$FS_STAGING" "$FS_TMPFILE"
else
make_fs "$FS_STAGING" "$FS_TMPFILE"
fi
VDI_SIZE=$(stat --format=%s "$FS_TMPFILE")
make_xva () {
local output_file="$1"
local xml_file="$2"
local subdir
local rio
if [[ `cat $xml_file` =~ "<member>\s*<name>class</name>\s*<value>VDI</value>\s*</member>\s*<member>\s*<name>id</name>\s*<value>(Ref:[0-9]+)</value>" ]]
then
# it's a rio style xva
subdir="${BASH_REMATCH[1]}";
rio=1
else
# it's a geneva style xva
subdir="xvda"
rio=0
fi
cp "$xml_file" "$XVA_TARBALL_STAGING"/ova.xml
sed -i -e "s/@VDI_SIZE@/$VDI_SIZE/" "$XVA_TARBALL_STAGING"/ova.xml
mkdir "$XVA_TARBALL_STAGING/$subdir"
splitvdi "$FS_TMPFILE" "$XVA_TARBALL_STAGING/$subdir" "$rio"
TARFILE_MEMBERS=$(cd "$XVA_TARBALL_STAGING" && echo ova.xml $subdir/*)
tar -C "$XVA_TARBALL_STAGING" --format=v7 -c $TARFILE_MEMBERS -f "$output_file.tmp"
mv "$output_file.tmp" "$output_file"
}
make_ovf () {
local output_dir="$1"
local xml_file="$2"
local output_base=$(basename "$output_dir")
local disk="$output_dir/${output_base}.vmdk"
local manifest="$output_dir/${output_base}.mf"
local ovf="$output_dir/${output_base}.ovf"
mkdir -p "$output_dir"
rm -f "$disk"
$VBOX_IMG convert --srcfilename="$FS_TMPFILE" --dstfilename="$disk" \
--srcformat RAW --dstformat VMDK --variant Stream
chmod 0644 "$disk"
local n_bytes=$(stat --printf=%s "$disk")
cp "$xml_file" "$ovf"
sed -i -e "s/@MKXVA_DISK_FULLSIZE@/$VDI_SIZE/" "$ovf"
sed -i -e "s/@MKXVA_DISK_SIZE@/$n_bytes/" "$ovf"
sed -i -e "s/@MKXVA_DISK_MIB_SIZE@/$FS_SIZE_MIB/" "$ovf"
sed -i -e "s/@MKXVA_DISK_FILENAME@/${output_base}.vmdk/" "$ovf"
for to_sign in "$ovf" "$disk"
do
local sha1_sum=$(sha1sum "$to_sign" | cut -d' ' -f1)
echo "SHA1($(basename "$to_sign"))= $sha1_sum" >> $manifest
done
}
output_files="$OPT_OUTPUT_FILES"
xml_files="$OPT_XML_FILES"
# Iterate through the type list creating the relevant VMs
for create_type in $OPT_TYPES
do
# Shift one parameter from the front of the lists
create_output_file="${output_files%% *}"
output_files="${output_files#* }"
create_xml_file="${xml_files%% *}"
xml_files="${xml_files#* }"
echo "Creating $create_type appliance $create_output_file using metadata file $create_xml_file"
case "$create_type" in
xva)
make_xva "$create_output_file" "$create_xml_file"
;;
ovf)
make_ovf "$create_output_file" "$create_xml_file"
;;
*)
echo "Unknown VM type '$create_type'"
exit 1
;;
esac
done
# cleanup
if [ -z "${DO_NOT_CLEANUP:-}" ] ; then
rm -rf "$XVA_TARBALL_STAGING"
rm -f "$FS_TMPFILE"
fi