@ -6,16 +6,23 @@ IMAGE_SIZE=$((2252*1024**2)) # 2.2G (the current size we ship)
rootfs_dev_mapper=
loop_device=
loop_raw=
backing_img=
apt-get -qqy install dosfstools gdisk
clean_loops() {
[ -z "${rootfs_dev_mapper}" ] || {
udevadm settle
find /dev/mapper -iname "${loop_device///dev\//}*" | \
xargs -n1 -I DEVICE dmsetup remove DEVICE ||
kpartx -d "${rootfs_dev_mapper}"
losetup -d "${loop_device}" || echo "Failed to detach disk"
if [ -z "${rootfs_dev_mapper}" ]; then
return 0
fi
if [ -n "${backing_img}" ]; then
kpartx -v -d "${backing_img}"
fi
unset backing_img
unset loop_device
unset loop_raw
}
unset rootfs_dev_mapper
}
create_empty_disk_image() {
@ -32,6 +39,7 @@ make_ext4_partition() {
mount_image() {
apt-get install -qqy kpartx
trap clean_loops EXIT
backing_img="$1"
loop_raw="$(kpartx -s -v -a "$1" )"
loop_device="$(echo -e "${loop_raw}" | head -n1 | awk '{print($(NF-1))}')"
rootfs_dev_mapper="/dev/mapper${loop_device///dev/}p1"
@ -46,22 +54,80 @@ mount_partition() {
mount "$partition" "$mountpoint"
mount --bind /dev "$mountpoint/dev"
mount devpts-live -t devpts "$mountpoint/dev/pts"
mount devpts-live -t proc "$mountpoint/dev/pts"
mount proc-live -t proc "$mountpoint/proc"
mount sysfs-live -t sysfs "$mountpoint/sys"
mount -t tmpfs none "$mountpoint/tmp"
mv "$mountpoint/etc/resolv.conf" resolv.conf.tmp
cp /etc/resolv.conf "$mountpoint/etc/resolv.conf"
}
mount_disk_image() {
local disk_image=${1}
local mountpoint=${2}
mount_image ${disk_image}
mount_partition "${rootfs_dev_mapper}" $mountpoint
local uefi_dev="/dev/mapper${loop_device///dev/}p15"
if [ -b ${uefi_dev} -a -e $mountpoint/boot/efi ]; then
mount "${uefi_dev}" $mountpoint/boot/efi
fi
# This is needed to allow for certain operations
# such as updating grub and installing software
cat > $mountpoint/usr/sbin/policy-rc.d << EOF
#!/bin/sh
# ${CLOUD_IMG_STR}
echo "All runlevel operations denied by policy" >&2
exit 101
EOF
chmod 0755 $mountpoint/usr/sbin/policy-rc.d
}
umount_settle() {
# Unmount device, and let it settle
umount $1
udevadm settle
sleep 3
}
umount_partition() {
local mountpoint=${1}
mv resolv.conf.tmp "$mountpoint/etc/resolv.conf"
for submnt in proc sys dev/pts dev tmp;
do
umount_settle $mountpoint/$submnt
done
umount_settle $mountpoint
if [ -n "${rootfs_dev_mapper}" -a -b "${rootfs_dev_mapper}" ]; then
# buildd's don't have /etc/mtab symlinked
# /etc/mtab is needed in order zerofree space for ext4 filesystems
[ -e /etc/mtab ] || ln -s /proc/mounts /etc/mtab
# both of these are likely overkill, but it does result in slightly
# smaller ext4 filesystem
apt-get -qqy install zerofree
e2fsck -y -E discard ${rootfs_dev_mapper}
zerofree ${rootfs_dev_mapper}
fi
}
umount_disk_image() {
mountpoint="$1"
mv resolv.conf.tmp "$mountpoint/etc/resolv.conf"
umount "$mountpoint/proc"
umount "$mountpoint/sys"
umount "$mountpoint/dev/pts"
umount "$mountpoint/dev"
umount "$mountpoint"
local uefi_dev="/dev/mapper${loop_device///dev/}p15"
if [ -e "$mountpoint/boot/efi" -a -b "$uefi_dev" ]; then
umount --detach-loop "$mountpoint/boot/efi"
fi
if [ -e $mountpoint/usr/sbin/policy-rc.d ]; then
rm $mountpoint/usr/sbin/policy-rc.d
fi
umount_partition $mountpoint
clean_loops
}
modify_vmdk_header() {
@ -129,3 +195,33 @@ create_vmdk() {
qemu-img info ${destination}
rm -rf ${scratch_d}
}
create_derivative() {
# arg1 is the disk type
# arg2 is the new name
unset derivative_img
case ${1} in
uefi) disk_image="binary/boot/disk-uefi.ext4";
dname="${disk_image//-uefi/-$2-uefi}";;
*) disk_image="binary/boot/disk.ext4";
dname="${disk_image//.ext4/-$2.ext4}";;
esac
if [ ! -e ${disk_image} ]; then
echo "Did not find ${disk_image}!"; exit 1;
fi
cp ${disk_image} ${dname}
export derivative_img=${dname}
}
convert_to_qcow2() {
apt-get install -qqy qemu-utils
src="$1"
destination="$2"
qemu-img convert -c -O qcow2 -o compat=0.10 "$src" "$destination"
qemu-img info "$destination"
}
Ben Howard
9 years ago