5abb4a4f12
Initial support for a centos7 image. This is separate to rhel7 because the major differences are things like repo and image locations, which are always going to be different. We should merge any real changes into the redhat-common layers. Apart from the added support files in centos7/*, the other change is mostly modifications to redhat-common's extract-image to handle different partition layouts of the centos7 image. Change-Id: I943abe5ff0a803f36eda266a79af0d9220edcae7
101 lines
3.4 KiB
Bash
Executable File
101 lines
3.4 KiB
Bash
Executable File
#!/bin/bash
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# Intended to be called from the root.d cloud-image script as follows:
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# $TMP_HOOKS_PATH/bin/extract-image $BASE_IMAGE_FILE $BASE_IMAGE_TAR $IMAGE_LOCATION $CACHED_IMAGE
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set -eu
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set -o pipefail
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BASE_IMAGE_FILE=$1
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BASE_IMAGE_TAR=$2
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IMAGE_LOCATION=$3
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CACHED_IMAGE=$4
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CACHED_TAR=$DIB_IMAGE_CACHE/$BASE_IMAGE_TAR
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DIB_LOCAL_IMAGE=${DIB_LOCAL_IMAGE:-""}
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if [ -n "$DIB_OFFLINE" -a -f "$CACHED_TAR" ] ; then
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echo "Not checking freshness of cached $CACHED_TAR."
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else
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if [ -z "$DIB_LOCAL_IMAGE" ]; then
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echo "Fetching Base Image"
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# There seems to be some bad Fedora mirrors returning http 404's for the cloud image.
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# If the image fails to download due to a 404 we retry once.
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set +e
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$TMP_HOOKS_PATH/bin/cache-url $IMAGE_LOCATION $CACHED_IMAGE
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RV=$?
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set -e
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if [ "$RV" == "44" ] ; then
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$TMP_HOOKS_PATH/bin/cache-url $IMAGE_LOCATION $CACHED_IMAGE
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elif [ "$RV" != "0" ] ; then
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exit 1
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fi
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fi
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if [ ! -f $CACHED_TAR -o \
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$CACHED_IMAGE -nt $CACHED_TAR ] ; then
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echo "Repacking base image as tarball."
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WORKING=$(mktemp -d)
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EACTION="rm -r $WORKING"
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trap "$EACTION" EXIT
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echo "Working in $WORKING"
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RAW_FILE=$(basename $BASE_IMAGE_FILE)
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RAW_FILE=${RAW_FILE#.qcow2}.raw
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qemu-img convert -f qcow2 -O raw $CACHED_IMAGE $WORKING/$RAW_FILE
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# F19 images have the rootfs partition on p1
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# Centos7 images on p3 (p1 boot, p2 swap)
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if [[ $DISTRO_NAME = "centos7" ]]; then
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ROOT_PARTITON=p3
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else
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ROOT_PARTITON=p1
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fi
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# kpartx fails if no /dev/loop* exists, "losetup -f" prints first unused
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# loop device and creates it if it doesn't exist
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sudo losetup -f
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# XXX: Parsing stdout is dangerous, would like a better way to discover
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# the device used for the image.
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ROOT_LOOPDEV=$(sudo kpartx -av $WORKING/$RAW_FILE | \
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awk "/loop[0-9]+$ROOT_PARTITON/ {print \$3}")
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if ! timeout 5 sh -c "while ! [ -e /dev/mapper/$ROOT_LOOPDEV ]; do sleep 1; done"; then
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echo "Error: Could not find /dev/mapper/$ROOT_LOOPDEV"
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exit 1
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fi
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EACTION="sudo kpartx -d $WORKING/$RAW_FILE ; $EACTION"
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trap "$EACTION" EXIT
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mkdir $WORKING/mnt
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sudo mount /dev/mapper/$ROOT_LOOPDEV $WORKING/mnt
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EACTION="sudo umount -f $WORKING/mnt ; $EACTION"
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trap "$EACTION" EXIT
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# need to copy the contents of /boot into the image too, so
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# mount it
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if [[ $DISTRO_NAME = "centos7" ]]; then
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BOOT_LOOPDEV=${ROOT_LOOPDEV/p3/p1}
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sudo mount /dev/mapper/$BOOT_LOOPDEV $WORKING/mnt/boot
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EACTION="sudo umount -f $WORKING/mnt/boot ; $EACTION"
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trap "$EACTION" EXIT
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fi
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# Chroot in so that we get the correct uid/gid
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sudo chroot $WORKING/mnt bin/tar -cz . > $WORKING/tmp.tar
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mv $WORKING/tmp.tar $CACHED_TAR
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else
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echo "Using cached tar from $CACHED_TAR"
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fi
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fi
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# Extract the base image (use --numeric-owner to avoid UID/GID mismatch between
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# image tarball and host OS e.g. when building Fedora image on an openSUSE host)
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echo "Extracting base root image from $CACHED_TAR"
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sudo tar -C $TARGET_ROOT --numeric-owner -xzf $CACHED_TAR
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if [ -e "$TARGET_ROOT/lost+found" ]; then
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sudo rmdir $TARGET_ROOT/lost+found
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fi
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