803d40b0c6
The original approach was to pass each and every command line parameter to the block device. While the block device functionality gets extended, this is not any longer practical. Instead of passing in all the parameters separately this patch collects these in a YAML file that is passed in to the block device layer. Change-Id: I9d07593a01441b62632234468ac25a982cf1a9f0 Signed-off-by: Andreas Florath <andreas@florath.net>
409 lines
12 KiB
Bash
409 lines
12 KiB
Bash
#!/bin/bash
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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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# This is the "internal" verison of dib-run-parts. Note the currently
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# this is copied by the dib-run-parts element into the chroot. If you
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# modify this, be aware that it needs to run in both contexts.
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DIB_RUN_PARTS=${_LIB}/dib-run-parts
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function tmpfs_check() {
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local echo_message=${1:-1}
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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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if [ $echo_message == '1' ]; then
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echo "WARNING: Not enough RAM to use tmpfs for build. Using ${TMP_DIR:-/tmp}. ($total_kB < ${RAM_NEEDED}G)"
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fi
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return 1
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}
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function mk_build_dir () {
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TMP_BUILD_DIR=$(mktemp -t -d --tmpdir=${TMP_DIR:-/tmp} dib_build.XXXXXXXX)
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TMP_IMAGE_DIR=$(mktemp -t -d --tmpdir=${TMP_DIR:-/tmp} dib_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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sudo mount -t tmpfs tmpfs $TMP_IMAGE_DIR
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sudo chown $(id -u):$(id -g) $TMP_BUILD_DIR $TMP_IMAGE_DIR
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fi
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trap trap_cleanup EXIT
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echo Building in $TMP_BUILD_DIR
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export TMP_IMAGE_DIR
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export OUT_IMAGE_PATH=$TMP_IMAGE_PATH
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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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if [ -f $1 -a ${OVERWRITE_OLD_IMAGE:-0} -eq 0 ]; then
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old_image="${1%.*}"-$(date +%Y.%m.%d-%H.%M.%S).${1##*.}
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echo "Old image found. Renaming it to $old_image"
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mv "$1" "$old_image"
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if [ -f "$1.md5" ]; then
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mv "$1.md5" "$old_image.md5"
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fi
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if [ -f "$1.sha256" ]; then
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mv "$1.sha256" "$old_image.sha256"
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fi
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fi
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mv $OUT_IMAGE_PATH $1
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if [ "$DIB_CHECKSUM" == "1" ]; then
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# NOTE(pabelanger): Read image into memory once and generate both checksum
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# files.
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md5sum $1 > $1.md5 & sha256sum $1 > $1.sha256 & wait
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fi
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echo "Image file $1 created..."
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}
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function save_image () {
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finish_image $1
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}
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function copy_hooks_not_overwrite () {
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_DIR=$(basename $1)
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test -d $TMP_HOOKS_PATH/$_DIR || mkdir $TMP_HOOKS_PATH/$_DIR
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for _HOOK in $(ls $1); do
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if [ ! -f $TMP_HOOKS_PATH/$_DIR/$_HOOK ]; then
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echo "Copying hooks $1/$_HOOK"
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cp -t $TMP_HOOKS_PATH/$_DIR -a $1/$_HOOK
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else
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echo "There is a duplicated hook in your elements: $_ELEMENT/$_DIR/$_HOOK"
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exit 1
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fi
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done
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}
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function generate_hooks () {
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local dir
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local file
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eval declare -A image_elements=($(get_image_element_array))
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mkdir -p $TMP_HOOKS_PATH
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for i in "${!image_elements[@]}"; do
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local element=$i
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local element_dir=${image_elements[$i]}
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for dir in $(find $element_dir \
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-follow -mindepth 1 -maxdepth 1 \
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-type d -not -name tests); do
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copy_hooks_not_overwrite $dir
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done
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for file in $(find $element_dir \
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-follow -maxdepth 1 -type f); do
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cp -t $TMP_HOOKS_PATH -a $file
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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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# $2 is the regex to look for
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function eval_run_d () {
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local run_output=$(mktemp)
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trap "rm -f $run_output; check_break after-error ${break_cmd:-bash}" ERR
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run_d $1 $run_output
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if grep -q "$2" $run_output; then
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local temp=$(grep "$2" $run_output)
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eval "$temp"
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fi
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rm $run_output
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trap - ERR
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}
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# Get any process that appears to be running in $TMP_BUILD_DIR
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function _get_chroot_processes () {
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# Deselect kernel threads, and use a python script to avoid
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# forking lots and lots of readlink / grep processes on a busy
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# system.
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ps --ppid 2 -p 2 --deselect -o pid= | xargs python -c '
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import os
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import sys
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for pid in sys.argv[2:]:
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try:
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root = os.readlink("/proc/%s/root" % pid)
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except:
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continue
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if sys.argv[1] in root:
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print("%s" % pid)
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' $TMP_BUILD_DIR
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}
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function kill_chroot_processes () {
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local xtrace
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xtrace=$(set +o | grep xtrace)
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set +o xtrace
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local pidname
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if [ -z "${1}" ]; then
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echo "ERROR: no chroot directory specified"
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exit 1
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fi
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for pid in $(_get_chroot_processes); do
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# If there are open files from the chroot, just kill the process using
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# these files. This is racy, but good enough
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pidname=$(cat $piddir/comm 2>/dev/null || echo "unknown")
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echo "Killing chroot process: '${pidname}($pid)'"
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sudo kill $pid
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done
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$xtrace
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}
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function cleanup_build_dir () {
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if ! timeout 5 sh -c " while ! sudo rm -rf $TMP_BUILD_DIR/built; do sleep 1; done"; then
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echo "ERROR: unable to cleanly remove $TMP_BUILD_DIR/built"
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exit 1
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fi
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sudo rm -rf $TMP_BUILD_DIR/mnt
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kill_chroot_processes $TMP_BUILD_DIR
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if tmpfs_check 0; then
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# If kill_chroot_processes did not succeed then we have to wait for
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# init to reap the orphaned chroot processes
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if ! timeout 120 sh -c "while ! sudo umount -f $TMP_BUILD_DIR; do sleep 1; done"; then
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echo "ERROR: failed to umount the $TMP_BUILD_DIR tmpfs mount point"
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exit 1
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fi
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fi
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rm -rf --one-file-system $TMP_BUILD_DIR
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}
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function cleanup_image_dir () {
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kill_chroot_processes $TMP_IMAGE_DIR
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if tmpfs_check 0; then
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if ! timeout 120 sh -c "while ! sudo umount -f $TMP_IMAGE_DIR; do sleep 1; done"; then
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echo "ERROR: failed to umount the $TMP_IMAGE_DIR tmpfs mount point"
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exit 1
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fi
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fi
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rm -rf --one-file-system $TMP_IMAGE_DIR
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}
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# Run a directory of hooks outside the target (that is, no chrooting).
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function run_d() {
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check_element
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check_break before-$1 ${break_cmd:-bash}
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if [ -d ${TMP_HOOKS_PATH}/$1.d ] ; then
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echo "Running hooks from ${TMP_HOOKS_PATH}/$1.d"
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if [ -n "$2" ]; then
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${DIB_RUN_PARTS} ${TMP_HOOKS_PATH}/$1.d | tee $2
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if [[ ${PIPESTATUS[0]} != 0 ]]; then
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return 1
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fi
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else
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${DIB_RUN_PARTS} ${TMP_HOOKS_PATH}/$1.d
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fi
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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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if sudo dmsetup ls | grep $loopdev_name; then
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mapper_name=$(sudo dmsetup ls | grep $loopdev_name | awk '{ print $1 }')
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sudo dmsetup --noudevsync remove $mapper_name
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fi
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return 0
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}
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function arg_to_elements() {
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for arg do IMAGE_ELEMENT="$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_ELEMENT $IMAGE_ELEMENT"
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fi
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echo "Building elements: $IMAGE_ELEMENT"
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export IMAGE_ELEMENT
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# element-info will output bash code to create
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# * IMAGE_ELEMENT
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# legacy list of elements
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#
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# * IMAGE_ELEMENT_YAML
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# YAML dictionary with key=element, value=path
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#
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# import os
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# import yaml
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# yaml.load(os.getenv('IMAGE_ELEMENT_YAML')
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#
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# * function get_image_element_array
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# Function to create Bash associative-array. Since bash can not
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# export array variables, we provide a function to populate the
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# variables.
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#
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# # we need the eval, it expands the string for the array create
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# eval declare -A image_elements=($(get_image_element_array))
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# for i in ${!image_elements[@]}; do
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# element=$i
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# path=${image_elements[$i]
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# done
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elinfo_out="$(element-info --env $IMAGE_ELEMENT)"
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if [ $? -ne 0 ]; then
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echo "ERROR: element-info failed to expand elements."
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exit 1
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fi
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eval "$elinfo_out"
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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 "Failed to deploy the 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 ]; 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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# Recursively unmount directories under a given directory DIR
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# usage:
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# unmount_dir DIR
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function unmount_dir {
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local dir="$1"
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local real_dir
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local mnts
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if [ ! -d $dir ]; then
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echo "*** $dir is not a directory"
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return 0
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fi
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# get rid of any symlink elements in the incoming path, because
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# /proc/mounts is the real path
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real_dir=$(readlink -e $dir)
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mnts=$(awk '{print $2}' < /proc/mounts | grep "^$real_dir" | sort -r)
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for m in $mnts; do
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echo "Unmount $m"
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sudo umount -fl $m || true
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done
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}
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# Create YAML config file for the block device layer
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# The order here is: use the one the user provides - if there is
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# none provided, fall back to the possible one element which
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# defines a fallback configuration.
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# Parameters:
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# - name of the to be created config file
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function block_device_create_config_file {
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local CONFIG_YAML="$1"
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# User setting overwrites this
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if [[ ${DIB_BLOCK_DEVICE_CONFIG:-} == file://* ]]; then
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cp $(echo ${DIB_BLOCK_DEVICE_CONFIG} | cut -c 8-) ${CONFIG_YAML}
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return
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fi
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if [ -n "${DIB_BLOCK_DEVICE_CONFIG:-}" ]; then
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printf "%s" "${DIB_BLOCK_DEVICE_CONFIG}" >${CONFIG_YAML}
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return
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fi
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eval declare -A image_elements=($(get_image_element_array))
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for i in ${!image_elements[@]}; do
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local BLOCK_DEVICE_CFG_PATH=${image_elements[$i]}/block-device-${ARCH}.yaml
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if [ -e ${BLOCK_DEVICE_CFG_PATH} ]; then
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cp ${BLOCK_DEVICE_CFG_PATH} ${CONFIG_YAML}
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else
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BLOCK_DEVICE_CFG_PATH=${image_elements[$i]}/block-device-default.yaml
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if [ -e ${BLOCK_DEVICE_CFG_PATH} ]; then
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cp ${BLOCK_DEVICE_CFG_PATH} ${CONFIG_YAML}
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fi
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fi
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done
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# If no config is there (until now) use the default config
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if [ ! -e ${CONFIG_YAML} ]; then
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cat >${CONFIG_YAML} <<EOF
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- local_loop:
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name: image0
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mkfs:
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name: mkfs_root
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mount:
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mount_point: /
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fstab:
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options: "defaults"
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fsck-passno: 1
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EOF
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fi
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}
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