diskimage-builder/lib/img-functions
Robert Collins 012116cad6 Move everything 'common' into base, making it avoidable for tests.
Change-Id: I87edd00f6e0edcd609856192c2c98604ef3274f0
2012-12-14 13:41:57 +13:00

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# Copyright 2012 Hewlett-Packard Development Company, L.P.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
function unmount_image () {
# unmount from the chroot
# Don't use TMP_MOUNT_PATH here, it might not have been set.
sudo umount -f $TMP_BUILD_DIR/mnt/sys || true
sudo umount -f $TMP_BUILD_DIR/mnt/proc || true
sudo umount -f $TMP_BUILD_DIR/mnt/dev || true
sudo umount -f $TMP_BUILD_DIR/mnt/tmp/in_target.d || true
# give it a second (ok really 5) to umount XXX - why? should instead track
# the mount data / lsof etc.
sleep 5
# oh ya don't want to forget to unmount the image
sudo umount -f $TMP_BUILD_DIR/mnt || true
# having disk corruption issues; one possibility is qemu-nbd not flush dirty
# pages on disconnect?
sync
if [ -n "$EXTRA_UNMOUNT" ]; then
$EXTRA_UNMOUNT
fi
}
function cleanup () {
unmount_image
rm -rf $TMP_BUILD_DIR
}
function ensure_nbd () {
NBD=`which qemu-nbd` || true
if [ -z "$NBD" ]; then
echo "Need qemu-nbd to build qcow2 files."
sudo apt-get install qemu-utils
fi
# prep nbd for mounting
(lsmod | grep '^nbd ') || sudo modprobe nbd max_part=16
}
function ensure_base_available () {
# TODO: don't cache -current forever.
if [ ! -f $IMG_PATH/$BASE_IMAGE_FILE ] ; then
echo "Fetching Base Image"
wget $CLOUD_IMAGES/$RELEASE/current/$BASE_IMAGE_FILE -O $IMG_PATH/$BASE_IMAGE_FILE.tmp
mv $IMG_PATH/$BASE_IMAGE_FILE.tmp $IMG_PATH/$BASE_IMAGE_FILE
fi
}
function ensure_sudo () {
sudo echo "Ensuring sudo is available"
}
function mount_tmp_image () {
mkdir $TMP_BUILD_DIR/mnt
sudo mount $@ $TMP_BUILD_DIR/mnt
[ $? -eq 0 ] || die "Failed to mount image"
export TMP_MOUNT_PATH=$TMP_BUILD_DIR/mnt
}
function create_base () {
# Extract the base image
sudo tar -C $TMP_MOUNT_PATH -xzf $IMG_PATH/$BASE_IMAGE_FILE
# Configure Image
# Setup resolv.conf so we can chroot to install some packages
# XXXX: Should store the old state rather than unlink; then restore later.
if [ -L $TMP_MOUNT_PATH/etc/resolv.conf ] ; then
sudo unlink $TMP_MOUNT_PATH/etc/resolv.conf
fi
if [ -f $TMP_MOUNT_PATH/etc/resolv.conf ] ; then
sudo rm -f $TMP_MOUNT_PATH/etc/resolv.conf
fi
# Recreate resolv.conf
sudo touch $TMP_MOUNT_PATH/etc/resolv.conf
sudo chmod 777 $TMP_MOUNT_PATH/etc/resolv.conf
# use system configured resolv.conf if available to support internal proxy resolving
if [ -e /etc/resolv.conf ]
then
cat /etc/resolv.conf > $TMP_MOUNT_PATH/etc/resolv.conf
else
echo nameserver 8.8.8.8 > $TMP_MOUNT_PATH/etc/resolv.conf
fi
# supporting kernel file systems
sudo mount -t proc none $TMP_MOUNT_PATH/proc
sudo mount --bind /dev $TMP_MOUNT_PATH/dev
sudo mount -t sysfs none $TMP_MOUNT_PATH/sys
# If we have a network proxy, use it.
if [ -n "$http_proxy" ] ; then
sudo dd of=$TMP_MOUNT_PATH/etc/apt/apt.conf.d/60img-build-proxy << _EOF_
Acquire::http::Proxy "$http_proxy";
_EOF_
fi
}
# Helper function to run a command inside the chroot
function run_in_target() {
# -E to preserve http_proxy
sudo -E chroot $TMP_MOUNT_PATH "$@"
}
# Helper function to run a directory of scripts inside the chroot
function run_d_in_target() {
check_element
# If we can find a directory of hooks to run in the target filesystem, bind
# mount it into the target and then execute run-parts in a chroot
if [ -d ${TMP_HOOKS_PATH}/$1.d ] ; then
sudo mkdir $TMP_MOUNT_PATH/tmp/in_target.d
sudo mount --bind ${TMP_HOOKS_PATH} $TMP_MOUNT_PATH/tmp/in_target.d
sudo mount -o remount,ro,bind ${TMP_HOOKS_PATH} $TMP_MOUNT_PATH/tmp/in_target.d
run_in_target run-parts -v /tmp/in_target.d/$1.d
sudo umount -f $TMP_MOUNT_PATH/tmp/in_target.d
sudo rmdir $TMP_MOUNT_PATH/tmp/in_target.d
fi
}
# Run a directory of hooks outside the target.
function run_d() {
check_element
if [ -d ${TMP_HOOKS_PATH}/$1.d ] ; then
run-parts ${TMP_HOOKS_PATH}/$1.d
fi
}
function prepare_first_boot () {
if [ -d ${TMP_HOOKS_PATH}/first-boot.d ] ; then
sudo cp -t $TMP_MOUNT_PATH/etc/ -a $TMP_HOOKS_PATH/first-boot.d
run_in_target mv /etc/rc.local /etc/rc.local.REAL
sudo dd of=$TMP_MOUNT_PATH/etc/rc.local <<EOF
#!/bin/bash
set -e
set -o xtrace
run-parts -v /etc/first-boot.d
rm -fr /etc/first-boot.d
mv /etc/rc.local.REAL /etc/rc.local
exit 0
EOF
run_in_target chmod 755 /etc/rc.local
fi
}
function finalise_base () {
# Undo our proxy support
sudo rm -f $TMP_MOUNT_PATH/etc/apt/apt.conf.d/60img-build-proxy
# Now remove the resolv.conf we created above
sudo rm -f $TMP_MOUNT_PATH/etc/resolv.conf
# The we need to recreate it as a link
sudo ln -sf ../run/resolvconf/resolv.conf $TMP_MOUNT_PATH/etc/resolv.conf
}
function compress_image () {
# Recreate our image to throw away unnecessary data
qemu-img convert ${COMPRESS_IMAGE:+-c} $TMP_IMAGE_PATH -O qcow2 $TMP_IMAGE_PATH-new
rm $TMP_IMAGE_PATH
mv $TMP_IMAGE_PATH-new $TMP_IMAGE_PATH
}
function block_apt_translations () {
# Configure APT not to fetch translations files
sudo dd of=$TMP_MOUNT_PATH/etc/apt/apt.conf.d/95no-translations <<EOF
APT::Acquire::Languages "none";
EOF
# And now make sure that we don't fall foul of Debian bug 641967
find $TMP_MOUNT_PATH/var/lib/apt/lists/ -type f -name '*_i18n_Translation-*' -exec sudo rm -f {} \;
}
function block_daemons () {
# Prevent package installs from starting daemons
sudo mv $TMP_MOUNT_PATH/sbin/start-stop-daemon $TMP_MOUNT_PATH/sbin/start-stop-daemon.REAL
sudo dd of=$TMP_MOUNT_PATH/sbin/start-stop-daemon <<EOF
#!/bin/sh
echo
echo "Warning: Fake start-stop-daemon called, doing nothing"
EOF
sudo chmod 755 $TMP_MOUNT_PATH/sbin/start-stop-daemon
sudo mv $TMP_MOUNT_PATH/sbin/initctl $TMP_MOUNT_PATH/sbin/initctl.REAL
sudo dd of=$TMP_MOUNT_PATH/sbin/initctl <<EOF
#!/bin/sh
echo "initctl (tripleo 1.0)"
echo "Warning: Fake initctl called, doing nothing"
EOF
sudo chmod 755 $TMP_MOUNT_PATH/sbin/initctl
sudo mv $TMP_MOUNT_PATH/usr/sbin/invoke-rc.d $TMP_MOUNT_PATH/usr/sbin/invoke-rc.d.REAL
sudo dd of=$TMP_MOUNT_PATH/usr/sbin/invoke-rc.d <<EOF
#!/bin/sh
echo "invoke-rc.d (tripleo 1.0)"
echo "Warning: Fake inovke-rc.d called, doing nothing"
EOF
sudo chmod 755 $TMP_MOUNT_PATH/usr/sbin/invoke-rc.d
}
function unblock_daemons () {
sudo mv $TMP_MOUNT_PATH/sbin/start-stop-daemon.REAL $TMP_MOUNT_PATH/sbin/start-stop-daemon
sudo mv $TMP_MOUNT_PATH/sbin/initctl.REAL $TMP_MOUNT_PATH/sbin/initctl
sudo mv $TMP_MOUNT_PATH/usr/sbin/invoke-rc.d.REAL $TMP_MOUNT_PATH/usr/sbin/invoke-rc.d
}
function do_pre_install () {
block_daemons
block_apt_translations
# Run pre-install scripts. These do things that prepare the chroot for package installs
run_d_in_target pre-install
}
function do_install () {
# Call install scripts to pull in the software users want.
run_d_in_target install
unblock_daemons
}