diskimage-builder/elements/fedora/root.d/10-fedora-cloud-image
Derek Higgins 11b116977c Specify distro release in fedora image name
The fedora element downloads the latest available image so presumably
will jump to F20 once available. Probably causing several days (weeks?)
of busted stuff. Of course it will be impossible to know when all users
of the elements are ready to switch but the least we can do is allow a
little time as a buffer.

This commit ties it down to a specific version which can then be updated
when the consumers of this element are ready. This allso follows the
same pattern as the ubuntu element.

Change-Id: I15c8e15a66e8af1bd152c27144acbc55af9da88e
2013-10-10 08:21:52 +01:00

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#!/bin/bash
set -eu
[ -n "$ARCH" ]
[ -n "$TARGET_ROOT" ]
if [ 'amd64' = "$ARCH" ] ; then
ARCH="x86_64"
fi
DIB_RELEASE=${DIB_RELEASE:-19}
DIB_CLOUD_IMAGES=${DIB_CLOUD_IMAGES:-http://cloud.fedoraproject.org}
BASE_IMAGE_FILE=${BASE_IMAGE_FILE:-fedora-$DIB_RELEASE.$ARCH.qcow2}
BASE_IMAGE_TAR=$DIB_RELEASE-Cloud-$ARCH-$DIB_RELEASE.tgz
CACHED_TAR=$DIB_IMAGE_CACHE/$BASE_IMAGE_TAR
if [ -n "$DIB_OFFLINE" -a -f "$CACHED_TAR" ] ; then
echo "Not checking freshness of cached $CACHED_TAR."
else
echo "Fetching Base Image"
$TMP_HOOKS_PATH/bin/cache-url $DIB_CLOUD_IMAGES/$BASE_IMAGE_FILE $DIB_IMAGE_CACHE/$BASE_IMAGE_FILE
if [ ! -f $CACHED_TAR -o \
$DIB_IMAGE_CACHE/$BASE_IMAGE_FILE -nt $CACHED_TAR ] ; then
echo "Repacking base image as tarball."
WORKING=$(mktemp -d)
EACTION="rm -r $WORKING"
trap "$EACTION" EXIT
echo "Working in $WORKING"
RAW_FILE=$(basename $BASE_IMAGE_FILE)
RAW_FILE=${RAW_FILE#.qcow2}.raw
qemu-img convert -f qcow2 -O raw $DIB_IMAGE_CACHE/$BASE_IMAGE_FILE $WORKING/$RAW_FILE
# WARNING: The mattdm image has the root filesystem on the second
# partition (p2). If he changes the image the MAGIC_BIT
# might also need to change.
# UPDATE to above warning alluding to Fedora18:
# F19 images have the rootfs partition on p1
MAGIC_BIT=p1
# XXX: Parsing stdout is dangerous, would like a better way to discover
# the device used for the image.
# NOTE: On F17 (parted-3.0-10.fc17.x86_64), partprobe of
# /dev/loop0 does not create /dev/loop0p2, while kpartx at
# least creates /dev/mapper/loop0p2.
LOOPDEV=$(sudo kpartx -av $WORKING/$RAW_FILE | awk "/loop[0-9]+$MAGIC_BIT/ {print \$3}")
if ! timeout 5 sh -c "while ! [ -e /dev/mapper/$LOOPDEV ]; do sleep 1; done"; then
echo "Error: Could not find /dev/mapper/$LOOPDEV"
exit 1
fi
EACTION="sudo kpartx -d $WORKING/$RAW_FILE;$EACTION"
trap "$EACTION" EXIT
mkdir $WORKING/mnt
sudo mount /dev/mapper/$LOOPDEV $WORKING/mnt
EACTION="sudo umount -f $WORKING/mnt;$EACTION"
trap "$EACTION" EXIT
# Chroot in so that we get the correct uid/gid
sudo chroot $WORKING/mnt bin/tar -cz . > $WORKING/tmp.tar
mv $WORKING/tmp.tar $DIB_IMAGE_CACHE/$BASE_IMAGE_TAR
fi
fi
# Extract the base image (use --numeric-owner to avoid UID/GID mismatch between
# image tarball and host OS e.g. when building Fedora image on an openSUSE host)
sudo tar -C $TARGET_ROOT --numeric-owner -xzf $DIB_IMAGE_CACHE/$BASE_IMAGE_TAR
sudo rmdir $TARGET_ROOT/lost+found