dc93feee69
save_image is used to copy kernel and ramdisks out of the image, which we will sometimes want to keep the source, and sometimes not. However for the main image itself, the temp copy is never kept, so use mv rather than cp and avoid the excess IO. Change-Id: I5a9f0d69ffee3e6b872a8927537ac17f02f5aa4d
295 lines
9.0 KiB
Bash
295 lines
9.0 KiB
Bash
# vim: syntax=sh ts=4 sts=4 sw=2:et
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# Copyright 2012 Hewlett-Packard Development Company, L.P.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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function tmpfs_check() {
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[ "$DIB_NO_TMPFS" == "0" ] || return 1
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[ -r /proc/meminfo ] || return 1
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total_kB=$(awk '/^MemTotal/ { print $2 }' /proc/meminfo)
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# tmpfs uses by default 50% of the available RAM, so the RAM should be at least
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# the double of the minimum tmpfs size required
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RAM_NEEDED=$[ $DIB_MIN_TMPFS * 2 ]
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[ $total_kB -lt $(($RAM_NEEDED*1024*1024)) ] || return 0
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echo "Not enough RAM to use tmpfs for build. ($total_kB < ${RAM_NEEDED}G)"
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return 1
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}
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function mk_build_dir () {
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TMP_BUILD_DIR=$(mktemp -t -d --tmpdir=${TMP_DIR:-/tmp} image.XXXXXXXX)
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[ $? -eq 0 ] || die "Failed to create tmp directory"
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export TMP_BUILD_DIR
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if tmpfs_check ; then
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sudo mount -t tmpfs tmpfs $TMP_BUILD_DIR
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fi
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sudo chown $(id -u):$(id -g) $TMP_BUILD_DIR
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trap cleanup EXIT
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echo Building in $TMP_BUILD_DIR
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export TMP_IMAGE_PATH=$TMP_BUILD_DIR/image.raw
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export TMP_HOOKS_PATH=$TMP_BUILD_DIR/hooks
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}
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function finish_image () {
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mv $TMP_IMAGE_PATH $1
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cleanup_dirs
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# All done!
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trap EXIT
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echo "Image file $1 created..."
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}
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function save_image () {
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# TODO: this really should rename the old file
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if [ -f $1 ] ; then
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echo "Old Image file Found REMOVING"
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rm -f $1
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fi
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cp $TMP_IMAGE_PATH $1
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cleanup_dirs
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# All done!
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trap EXIT
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echo "Image file $1 created..."
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}
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function element_pre_check() {
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local element_dir=$1
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[ -d $element_dir ] || return 1
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if [ -d $element_dir/first-boot.d ] ; then
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first_boot_deprecated_message $element_dir
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fi
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}
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_DISPLAYED_FIRST_BOOT_DEPRECATED=0
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function first_boot_deprecated_message() {
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local element_dir=$1
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echo "WARNING: first-boot.d found in $element_dir"
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if [ $_DISPLAYED_FIRST_BOOT_DEPRECATED -eq 1 ] ; then
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return
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fi
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echo "***********************************************************"
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echo "* *"
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echo "* *"
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echo "* *"
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echo "* *"
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echo "* WARNING: first-boot.d is DEPRECATED, it will be removed *"
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echo "* from diskimage-builder in a future release. *"
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echo "* *"
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echo "* *"
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echo "* *"
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echo "* *"
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echo "***********************************************************"
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echo Pausing 10 seconds....
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sleep 10
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_DISPLAYED_FIRST_BOOT_DEPRECATED=1
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}
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function generate_hooks () {
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mkdir -p $TMP_HOOKS_PATH
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for _ELEMENT in $IMAGE_ELEMENT ; do
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for dir in $(echo $ELEMENTS_PATH | tr ":" " ") ; do
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element_pre_check $dir/$_ELEMENT || continue
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cp -t $TMP_HOOKS_PATH -a $dir/$_ELEMENT/* ;
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break
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done
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done
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}
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# Call the supplied break-in routine if the named point is listed in the break
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# list.
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# $1 the break point.
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# $2.. what to call if a break is needed
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function check_break () {
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if echo "$break" | egrep -e "(,|^)$1(,|$)" -q; then
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echo "Starting debug shell. Exit to resume building." >&2
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echo At stage $1 >&2
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shift
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"$@"
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echo "Resuming" >&2
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fi
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}
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# Check that a real element has been chosen (prevents foot-guns)
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function check_element () {
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[ -d $TMP_HOOKS_PATH ] || generate_hooks
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}
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# Run a hook, looking for a regex in its stdout, and eval the matched lines.
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# $1 is the hook to run
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# $2 is the regex to look for
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function eval_run_d () {
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local TEMP=`run_d $1`
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echo "$TEMP"
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if [ `echo "$TEMP" | grep -s "$2"` ]; then
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TEMP=`echo "$TEMP" | grep "$2"`
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eval "$TEMP"
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fi
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}
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# Usage: map_nbd $image
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# Returns nbd device path
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function map_nbd {
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(lsmod | grep '^nbd ' >/dev/null) || sudo modprobe nbd max_part=16
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if [[ $(qemu-nbd --help | grep cache) == *writeback* ]] ; then
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CACHE="--cache=writeback"
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else
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echo "Warning: qemu-nbd without --cache=writeback is /slow/."
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CACHE=""
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fi
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NBD_DEV=
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for i in `seq 0 15`; do
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if [ ! -e /sys/block/nbd$i/pid ]; then
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NBD_DEV=/dev/nbd$i
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# Connect to nbd and wait till it is ready
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sudo qemu-nbd -c $NBD_DEV $CACHE $1
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if ! timeout 60 sh -c "while ! [ -e /sys/block/nbd$i/pid ]; do sleep 1; done"; then
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echo "Couldn't connect $NBD_DEV"
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exit 1
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fi
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break
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fi
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done
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if [ -z "$NBD_DEV" ]; then
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echo "No free NBD slots"
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exit 1
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fi
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}
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# Delete and unmount the working dir used in extracting kernel/initrd
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function unmount_qcow_image () {
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sudo umount $WORK_DIR || true
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sudo qemu-nbd -d $NBD_DEV >/dev/null || true
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sudo rm -rf $WORK_DIR
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trap - SIGHUP SIGINT SIGTERM EXIT
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}
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function mount_qcow_image() {
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trap unmount_qcow_image SIGHUP SIGINT SIGTERM EXIT
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WORK_DIR=$(mktemp -d)
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map_nbd $1
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if [ -e "${NBD_DEV}p1" ]; then
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sudo mount ${NBD_DEV}p1 $WORK_DIR
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else
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sudo mount ${NBD_DEV} $WORK_DIR
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fi
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}
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function cleanup_dirs () {
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sudo rm -rf $TMP_BUILD_DIR/built
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sudo rm -rf $TMP_BUILD_DIR/mnt
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sudo umount -f $TMP_BUILD_DIR || true
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rm -rf $TMP_BUILD_DIR
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}
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# Run a directory of hooks outside the target.
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function run_d() {
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check_element
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check_break before-$1 bash
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if [ -d ${TMP_HOOKS_PATH}/$1.d ] ; then
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${SCRIPT_HOME}/dib-run-parts ${TMP_HOOKS_PATH}/$1.d
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fi
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check_break after-$1 bash
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}
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function detach_loopback() {
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local loopdev=$1
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# Remove the map if it exists
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# If setup on a rhel or derivative the map was created with kpartx not losetup
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# and subsequently needs to be removed.
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loopdev_name=$(echo $loopdev | sed 's/\/dev\///g')
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mapper_name=$(sudo dmsetup ls | grep $loopdev_name | awk '{ print $1 }')
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if [ "$mapper_name" ]; then
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sudo dmsetup remove $mapper_name
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fi
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# loopback dev may be tied up a bit by udev events triggered by partition events
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for try in $(seq 10 -1 1) ; do
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if sudo losetup -d $loopdev ; then
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return 0
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fi
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echo $loopdev may be busy, sleeping up to $try more seconds...
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sleep 1
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done
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echo Gave up trying to detach $loopdev
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return 1
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}
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function arg_to_elements() {
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for arg do IMAGE_ELEMENT="$IMAGE_ELEMENT $arg" ; done
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if [ "$SKIP_BASE" != "1" ]; then
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IMAGE_ELEMENT="base $IMAGE_ELEMENT"
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fi
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if [ "$IS_RAMDISK" == "1" ]; then
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IMAGE_ELEMENT="ramdisk $IMAGE_ELEMENT"
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fi
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echo "Building elements: $IMAGE_ELEMENT"
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IMAGE_ELEMENT=$($SCRIPT_HOME/element-info --expand-dependencies $IMAGE_ELEMENT)
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echo "Expanded element dependencies to: $IMAGE_ELEMENT"
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}
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function create_base () {
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mkdir $TMP_BUILD_DIR/mnt
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export TMP_MOUNT_PATH=$TMP_BUILD_DIR/mnt
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# Copy data in to the root.
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TARGET_ROOT=$TMP_MOUNT_PATH run_d root
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if [ -z "$(ls $TMP_MOUNT_PATH | grep -v '^lost+found\|tmp$')" ] ; then
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# No root element copied in. Note the test above allows
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# root.d elements to put things in /tmp
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echo "Please include at least one distribution root element."
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exit 1
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fi
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# Configure Image
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# Setup resolv.conf so we can chroot to install some packages
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if [ -L $TMP_MOUNT_PATH/etc/resolv.conf ] || [ -f $TMP_MOUNT_PATH/etc/resolv.conf ] ; then
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sudo mv $TMP_MOUNT_PATH/etc/resolv.conf $TMP_MOUNT_PATH/etc/resolv.conf.ORIG
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fi
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# Recreate resolv.conf
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sudo touch $TMP_MOUNT_PATH/etc/resolv.conf
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sudo chmod 777 $TMP_MOUNT_PATH/etc/resolv.conf
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# use system configured resolv.conf if available to support internal proxy resolving
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if [ -e /etc/resolv.conf ]
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then
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cat /etc/resolv.conf > $TMP_MOUNT_PATH/etc/resolv.conf
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else
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echo nameserver 8.8.8.8 > $TMP_MOUNT_PATH/etc/resolv.conf
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fi
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mount_proc_dev_sys
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}
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function mount_proc_dev_sys () {
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# supporting kernel file systems
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sudo mount -t proc none $TMP_MOUNT_PATH/proc
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sudo mount --bind /dev $TMP_MOUNT_PATH/dev
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sudo mount --bind /dev/pts $TMP_MOUNT_PATH/dev/pts
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sudo mount -t sysfs none $TMP_MOUNT_PATH/sys
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}
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function unmount_dir () {
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local pattern="$1" mnts=""
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if [ -n "$pattern" ]; then
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mnts=`awk '{print $2}' < /proc/mounts | grep "^$pattern" | sort -r`
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fi
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if [ -n "$mnts" ]; then
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sudo umount -fl $mnts || true
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fi
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}
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