9c7b8d1714
Some phases of diskimage-builder run outside the chroot environment, such as the extra-data.d scripts, and don't have access to dib-python. This means these scripts may choose the wrong python version by using "#!/usr/bin/env python" to execute. The svc-map element is an example. This patch creates a temporary directory and symbolic link for the correct version of python, then manipulates the environment PATH to preference the symbolic link "python" command. This will allow elements with these scripts to work correctly with the version of python diskimage-builder is running under. Change-Id: I289d621e1bfbba0eb174dff977d1a5c92c04e4fa Co-Authored-By: Ian Wienand <iwienand@redhat.com>
225 lines
9.1 KiB
Bash
225 lines
9.1 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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function unmount_image () {
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# Calling sync before helps ensure the mount isn't busy when you unmount it.
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# Previously observing having disk corruption issues; one possibility is
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# qemu-nbd not flushing dirty pages on disconnect?
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# https://bugs.launchpad.net/diskimage-builder/+bug/1214388
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sync
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# unmount from the chroot
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# Don't use TMP_MOUNT_PATH here, it might not have been set.
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unmount_dir "$TMP_BUILD_DIR/mnt"
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if [ -n "$EXTRA_DETACH" ]; then
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$EXTRA_DETACH
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fi
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if [ -n "$EXTRA_UNMOUNT" ]; then
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$EXTRA_UNMOUNT
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fi
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}
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function trap_cleanup() {
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exitval=$?
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cleanup
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exit $exitval
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}
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function cleanup () {
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unmount_image
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dib-block-device umount
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cleanup_build_dir
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cleanup_image_dir
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cleanup_temp_python_exec
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}
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# Helper function to run a command inside the chroot
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function run_in_target () {
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cmd="$@"
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# -E to preserve http_proxy
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ORIG_HOME=$HOME
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export HOME=/root
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# Force an empty TMPDIR inside the chroot. There is no need to use an user
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# defined tmp dir which may not exist in the chroot.
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# Bug: #1330290
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# Force the inclusion of a typical set of dirs in PATH, this is needed for guest
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# distros that have path elements not in the host PATH.
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sudo -E chroot $TMP_MOUNT_PATH env -u TMPDIR -u VIRTUAL_ENV PATH="\$PATH:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" sh -c "$cmd"
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export HOME=$ORIG_HOME
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}
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# Helper function to run a directory of scripts inside the chroot
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function run_d_in_target () {
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check_element
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# If we can find a directory of hooks to run in the target filesystem, bind
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# mount it into the target and then execute run-parts in a chroot
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if [ -d ${TMP_HOOKS_PATH}/$1.d ] ; then
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sudo mkdir $TMP_MOUNT_PATH/tmp/in_target.d
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# Copy dib-run-parts to be visible inside chroot. Note we leave
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# this here because in the future we might like to use a
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# different in-chroot runner that doesn't rely on the chroot
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# having bash/glibc/etc (containers, micro-images, etc).
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sudo cp ${DIB_RUN_PARTS} ${TMP_HOOKS_PATH}
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# Note that bind mounting R/O is a two step process, and it
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# wasn't until later util-linux that "bind,ro" worked as a
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# single step, see
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# https://git.kernel.org/cgit/utils/util-linux/util-linux.git/commit/?id=9ac77b8a78452eab0612523d27fee52159f5016a
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sudo mount --bind ${TMP_HOOKS_PATH} $TMP_MOUNT_PATH/tmp/in_target.d
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sudo mount -o remount,ro,bind ${TMP_HOOKS_PATH} $TMP_MOUNT_PATH/tmp/in_target.d
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check_break before-$1 run_in_target bash
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[ -z "$break_outside_target" ] && in_target_arg="run_in_target" || in_target_arg=
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trap "check_break after-error $in_target_arg ${break_cmd:-bash}" ERR
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run_in_target /tmp/in_target.d/dib-run-parts /tmp/in_target.d/$1.d
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trap - ERR
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check_break after-$1 run_in_target bash
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sudo umount -f $TMP_MOUNT_PATH/tmp/in_target.d
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if ! timeout 10 sh -c " while ! sudo rmdir $TMP_MOUNT_PATH/tmp/in_target.d; do sleep 1; done"; then
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echo "ERROR: unable to cleanly remove $TMP_MOUNT_PATH/tmp/in_target.d"
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exit 1
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fi
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fi
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}
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function finalise_base () {
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TARGET_ROOT=$TMP_MOUNT_PATH run_d cleanup
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# Finalise resolv.conf
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#
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# NOTE(ianw): the /etc/resolv.conf.ORIG file is an
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# external interface; elements might put a resolv.conf they
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# want in the final image into this file.
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#
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# In create_base() we replaced/created the initial resolv.conf
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# inside the image with a copy of the "outside" version so that
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# resolving during the build will work.
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#
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# If that file has been replace with a symlink (resolvconf package
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# can do this), or marked immutable, then don't restore the
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# original version, just leave it alone.
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if [ -L $TMP_MOUNT_PATH/etc/resolv.conf ] || \
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lsattr $TMP_MOUNT_PATH/etc/resolv.conf | grep '^....i' >/dev/null ; then
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# We're keeping the contents of resolv.conf set in the elements,
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# so remove the old saved file
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sudo rm -f $TMP_MOUNT_PATH/etc/resolv.conf.ORIG
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else
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# Remove the resolv.conf we created and put the original (or
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# perhaps modified) version back.
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sudo rm -f $TMP_MOUNT_PATH/etc/resolv.conf
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# Note that we use -L and -f to test here as test (and bash [[)
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# return false with -e if the link target does not exist.
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if [ -L $TMP_MOUNT_PATH/etc/resolv.conf.ORIG ] || [ -f $TMP_MOUNT_PATH/etc/resolv.conf.ORIG ] ; then
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sudo mv $TMP_MOUNT_PATH/etc/resolv.conf.ORIG $TMP_MOUNT_PATH/etc/resolv.conf
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fi
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fi
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# Cleanup /tmp in the guest, so there is less cruft left there
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unmount_dir $TMP_MOUNT_PATH/tmp
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find $TMP_MOUNT_PATH/tmp -maxdepth 1 -mindepth 1 | xargs sudo rm -rf --one-file-system
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# Truncate /var/log files in preparation for first boot
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sudo find ${TMP_MOUNT_PATH}/var/log -type f -exec cp /dev/null '{}' \;
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# also /root logs
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sudo find ${TMP_MOUNT_PATH}/root -name \*.log -type f -delete
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}
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function compress_and_save_image () {
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# Recreate our image to throw away unnecessary data
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test $IMAGE_TYPE != qcow2 && COMPRESS_IMAGE=""
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if [ -n "$QEMU_IMG_OPTIONS" ]; then
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EXTRA_OPTIONS="-o $QEMU_IMG_OPTIONS"
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else
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EXTRA_OPTIONS=""
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fi
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if [ "$IMAGE_TYPE" = "raw" ]; then
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mv $TMP_IMAGE_PATH $1-new
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elif [ "$IMAGE_TYPE" == "tgz" ]; then
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$DIB_GZIP_BIN -9 < $IMAGE_NAME.tar > $1-new
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rm $IMAGE_NAME.tar
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elif [ "$IMAGE_TYPE" == "vhd" ]; then
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cp $TMP_IMAGE_PATH $1-intermediate
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vhd-util convert -s 0 -t 1 -i $1-intermediate -o $1-intermediate
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vhd-util convert -s 1 -t 2 -i $1-intermediate -o $1-new
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# The previous command creates a .bak file
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rm $1-intermediate.bak
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OUT_IMAGE_PATH=$1-new
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else
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echo "Converting image using qemu-img convert"
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qemu-img convert ${COMPRESS_IMAGE:+-c} -f raw -O $IMAGE_TYPE $EXTRA_OPTIONS $TMP_IMAGE_PATH $1-new
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fi
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OUT_IMAGE_PATH=$1-new
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finish_image $1
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}
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function do_extra_package_install () {
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# Install any packages that were requested with the -p command line option
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if [ "$INSTALL_PACKAGES" != "" ]; then
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run_in_target install-packages ${INSTALL_PACKAGES[@]}
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fi
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}
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function copy_elements_lib () {
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sudo mkdir -p $TMP_MOUNT_PATH/lib/diskimage-builder
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sudo cp -t $TMP_MOUNT_PATH/lib/diskimage-builder $_LIB/elements-functions
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}
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# Dig up the initrd and kernel.
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function select_boot_kernel_initrd () {
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TARGET_ROOT=$1
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BOOTDIR=$TARGET_ROOT/boot
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if [ -n "${DIB_BAREMETAL_KERNEL_PATTERN:-}" -a -n "${DIB_BAREMETAL_INITRD_PATTERN:-}" ]; then
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KERNEL=$(basename $(eval ls -1rv "$BOOTDIR/${DIB_BAREMETAL_KERNEL_PATTERN}" | head -1))
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RAMDISK=$(basename $(eval ls -1rv "$BOOTDIR/${DIB_BAREMETAL_INITRD_PATTERN}" | head -1))
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elif [ -f $TARGET_ROOT/etc/redhat-release ]; then
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# Prioritize PAE if present
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KERNEL=$(ls -1rv $BOOTDIR/vmlinuz* | grep PAE | grep -v debug | head -1 || echo "")
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KERNEL=${KERNEL:-$(ls -1rv $BOOTDIR/vmlinuz* | grep -v debug | head -1 || echo "")}
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if [ ! $KERNEL ]; then
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echo "No suitable kernel found."
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exit 1
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fi
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KERNEL=$(basename $KERNEL)
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KERNEL_VERSION=${KERNEL#vmlinuz-}
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RAMDISK=$(basename $(ls $BOOTDIR/initramfs-$KERNEL_VERSION.img) || echo "")
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if [ ! $RAMDISK ]; then
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echo "Can't find an initramfs for the $KERNEL_VERSION version of the kernel."
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exit 1
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fi
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elif [ -f $TARGET_ROOT/etc/debian_version ]; then
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KERNEL=$(basename $(ls -1rv $BOOTDIR/vmlinu*generic 2>/dev/null || ls -1rv $BOOTDIR/vmlinu* | head -1))
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RAMDISK=$(basename $(ls -1rv $BOOTDIR/initrd*generic 2>/dev/null || ls -1rv $BOOTDIR/initrd* | head -1))
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if [ -f $TARGET_ROOT/dib-signed-kernel-version ] ; then
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. $TARGET_ROOT/dib-signed-kernel-version
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fi
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if [ -n "${DIB_SIGNED_KERNEL_VERSION:-}" ]; then
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echo "Using signed kernel $DIB_SIGNED_KERNEL_VERSION"
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KERNEL=$(basename $(ls -1rv $BOOTDIR/vmlinu*generic.efi.signed 2>/dev/null))
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fi
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elif [ -f $TARGET_ROOT/etc/SuSE-release ]; then
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KERNEL=$(basename $(readlink -e $BOOTDIR/vmlinuz))
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RAMDISK=$(basename $(readlink -e $BOOTDIR/initrd))
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elif [[ -f "${TARGET_ROOT}"/etc/gentoo-release ]]; then
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KERNEL="$(basename $(ls -1rv $BOOTDIR/kernel-*-openstack | head -n 1))"
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RAMDISK="$(basename $(ls -1rv $BOOTDIR/initramfs-*-openstack | head -n 1))"
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else
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echo "ERROR: Unable to detect operating system"
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exit 1
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fi
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}
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