You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
363 lines
11 KiB
363 lines
11 KiB
# vi: ts=4 expandtab syntax=sh
|
|
|
|
imagesize=${IMAGE_SIZE:-$((2252*1024**2))} # 2.2G (the current size we ship)
|
|
fs_label="${FS_LABEL:-rootfs}"
|
|
|
|
rootfs_dev_mapper=
|
|
loop_device=
|
|
loop_raw=
|
|
backing_img=
|
|
|
|
clean_loops() {
|
|
local kpartx_ret
|
|
local kpartx_stdout
|
|
|
|
if [ -n "${backing_img}" ]; then
|
|
# sync before removing loop to avoid "Device or resource busy" errors
|
|
sync
|
|
kpartx_ret=""
|
|
kpartx_stdout=$(kpartx -v -d "${backing_img}") || kpartx_ret=$?
|
|
echo "$kpartx_stdout"
|
|
if [ -n "$kpartx_ret" ]; then
|
|
if echo "$kpartx_stdout" | grep -q "loop deleted"; then
|
|
echo "Suppressing kpartx returning error (#860894)"
|
|
else
|
|
exit $kpartx_ret
|
|
fi
|
|
fi
|
|
unset backing_img
|
|
fi
|
|
|
|
if [ -z "${rootfs_dev_mapper}" ]; then
|
|
return 0
|
|
fi
|
|
|
|
unset loop_device
|
|
unset loop_raw
|
|
unset rootfs_dev_mapper
|
|
}
|
|
|
|
create_empty_disk_image() {
|
|
# Prepare an empty disk image
|
|
dd if=/dev/zero of="$1" bs=1 count=0 seek="${imagesize}"
|
|
}
|
|
|
|
make_ext4_partition() {
|
|
device="$1"
|
|
label=${fs_label:+-L "${fs_label}"}
|
|
mkfs.ext4 -F -b 4096 -i 8192 -m 0 ${label} -E resize=536870912 "$device"
|
|
}
|
|
|
|
mount_image() {
|
|
trap clean_loops EXIT
|
|
backing_img="$1"
|
|
local rootpart="$2"
|
|
kpartx_mapping="$(kpartx -s -v -a ${backing_img})"
|
|
|
|
# Find the loop device
|
|
loop_p1="$(echo -e ${kpartx_mapping} | head -n1 | awk '{print$3}')"
|
|
loop_device="/dev/loop$(echo ${loop_p1} | cut -b5)"
|
|
if [ ! -b ${loop_device} ]; then
|
|
echo "unable to find loop device for ${backing_img}"
|
|
exit 1
|
|
fi
|
|
|
|
# Find the rootfs location
|
|
rootfs_dev_mapper="/dev/mapper/${loop_p1%%[0-9]}${rootpart}"
|
|
if [ ! -b "${rootfs_dev_mapper}" ]; then
|
|
echo "${rootfs_dev_mapper} is not a block device";
|
|
exit 1
|
|
fi
|
|
|
|
# Add some information to the debug logs
|
|
echo "Mounted disk image ${backing_img} to ${rootfs_dev_mapper}"
|
|
blkid ${rootfs_dev_mapper}
|
|
|
|
return 0
|
|
}
|
|
|
|
setup_mountpoint() {
|
|
local mountpoint="$1"
|
|
|
|
mount --rbind --make-rslave /dev "$mountpoint/dev"
|
|
mount proc-live -t proc "$mountpoint/proc"
|
|
mount sysfs-live -t sysfs "$mountpoint/sys"
|
|
mount -t tmpfs none "$mountpoint/tmp"
|
|
mount -t tmpfs none "$mountpoint/var/lib/apt"
|
|
mount -t tmpfs none "$mountpoint/var/cache/apt"
|
|
mv "$mountpoint/etc/resolv.conf" resolv.conf.tmp
|
|
cp /etc/resolv.conf "$mountpoint/etc/resolv.conf"
|
|
chroot "$mountpoint" apt-get update
|
|
|
|
}
|
|
|
|
teardown_mountpoint() {
|
|
# Reverse the operations from setup_mountpoint
|
|
local mountpoint="$1"
|
|
|
|
# ensure we have exactly one trailing slash, and escape all slashes for awk
|
|
mountpoint_match=$(echo "$mountpoint" | sed -e's,/$,,; s,/,\\/,g;')'\/'
|
|
# sort -r ensures that deeper mountpoints are unmounted first
|
|
for submount in $(awk </proc/self/mounts "\$2 ~ /$mountpoint_match/ \
|
|
{ print \$2 }" | LC_ALL=C sort -r); do
|
|
umount $submount
|
|
done
|
|
mv resolv.conf.tmp "$mountpoint/etc/resolv.conf"
|
|
}
|
|
|
|
mount_partition() {
|
|
partition="$1"
|
|
mountpoint="$2"
|
|
|
|
mount "$partition" "$mountpoint"
|
|
setup_mountpoint "$mountpoint"
|
|
}
|
|
|
|
mount_overlay() {
|
|
lower="$1"
|
|
upper="$2"
|
|
work="$2/../work"
|
|
path="$3"
|
|
|
|
mkdir -p "$work"
|
|
mount -t overlay overlay \
|
|
-olowerdir="$lower",upperdir="$upper",workdir="$work" \
|
|
"$path"
|
|
}
|
|
|
|
mount_disk_image() {
|
|
local disk_image=${1}
|
|
local mountpoint=${2}
|
|
mount_image ${disk_image} 1
|
|
mount_partition "${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
|
|
# ${IMAGE_STR}
|
|
echo "All runlevel operations denied by policy" >&2
|
|
exit 101
|
|
EOF
|
|
chmod 0755 $mountpoint/usr/sbin/policy-rc.d
|
|
|
|
}
|
|
|
|
umount_partition() {
|
|
local mountpoint=${1}
|
|
teardown_mountpoint $mountpoint
|
|
umount -R $mountpoint
|
|
udevadm settle
|
|
|
|
if [ -n "${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
|
|
e2fsck -y -E discard ${rootfs_dev_mapper}
|
|
zerofree ${rootfs_dev_mapper}
|
|
fi
|
|
}
|
|
|
|
umount_disk_image() {
|
|
mountpoint="$1"
|
|
|
|
local uefi_dev="/dev/mapper${loop_device///dev/}p15"
|
|
if [ -e "$mountpoint/boot/efi" -a -b "$uefi_dev" ]; then
|
|
# zero fill free space in UEFI partition
|
|
cat < /dev/zero > "$mountpoint/boot/efi/bloat_file" 2> /dev/null || true
|
|
rm "$mountpoint/boot/efi/bloat_file"
|
|
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 $mountpoint
|
|
clean_loops
|
|
}
|
|
|
|
modify_vmdk_header() {
|
|
# Modify the VMDK headers so that both VirtualBox _and_ VMware can
|
|
# read the vmdk and import them.
|
|
|
|
vmdk_name="${1}"
|
|
descriptor=$(mktemp)
|
|
newdescriptor=$(mktemp)
|
|
|
|
# Extract the vmdk header for manipulation
|
|
dd if="${vmdk_name}" of="${descriptor}" bs=1 skip=512 count=1024
|
|
|
|
# The sed lines below is where the magic is. Specifically:
|
|
# ddb.toolsVersion: sets the open-vm-tools so that VMware shows
|
|
# the tooling as current
|
|
# ddb.virtualHWVersion: set the version to 7, which covers most
|
|
# current versions of VMware
|
|
# createType: make sure its set to stream Optimized
|
|
# remove the vmdk-stream-converter comment and replace with
|
|
# # Disk DescriptorFile. This is needed for Virtualbox
|
|
# remove the comments from vmdk-stream-converter which causes
|
|
# VirtualBox and others to fail VMDK validation
|
|
|
|
sed -e 's|# Description file.*|# Disk DescriptorFile|' \
|
|
-e '/# Believe this is random*/d' \
|
|
-e '/# Indicates no parent/d' \
|
|
-e '/# The Disk Data Base/d' \
|
|
-e 's|ddb.comment.*|ddb.toolsVersion = "2147483647"|' \
|
|
"${descriptor}" > "${newdescriptor}"
|
|
|
|
# The header is cannot be bigger than 1024
|
|
expr $(stat --format=%s ${newdescriptor}) \< 1024 > /dev/null 2>&1 || {
|
|
echo "descriptor is too large, VMDK will be invalid!"; exit 1; }
|
|
|
|
# Overwrite the vmdk header with our new, modified one
|
|
dd conv=notrunc,nocreat \
|
|
if="${newdescriptor}" of="${vmdk_name}" \
|
|
bs=1 seek=512 count=1024
|
|
|
|
rm ${descriptor} ${newdescriptor}
|
|
}
|
|
|
|
create_vmdk() {
|
|
# There is no real good way to create a _compressed_ VMDK using open source
|
|
# tooling that works across multiple VMDK-capable platforms. This functions
|
|
# uses vmdk-stream-converter and then calls modify_vmdk_header to produce a
|
|
# compatible VMDK.
|
|
|
|
src="$1"
|
|
destination="$2"
|
|
size="${3:-10240}"
|
|
|
|
streamconverter="VMDKstream"
|
|
scratch_d=$(mktemp -d)
|
|
cp ${src} ${scratch_d}/resize.img
|
|
|
|
truncate --size=${size}M ${scratch_d}/resize.img
|
|
python -m ${streamconverter} ${scratch_d}/resize.img ${destination}
|
|
modify_vmdk_header ${destination}
|
|
|
|
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() {
|
|
src="$1"
|
|
destination="$2"
|
|
qemu-img convert -c -O qcow2 -o compat=0.10 "$src" "$destination"
|
|
qemu-img info "$destination"
|
|
}
|
|
|
|
replace_grub_root_with_label() {
|
|
# When update-grub is run, it will detect the disks in the build system.
|
|
# Instead, we want grub to use the right labelled disk
|
|
CHROOT_ROOT="$1"
|
|
|
|
# If boot by partuuid has been requested, don't override.
|
|
if [ -f $CHROOT_ROOT/etc/default/grub.d/40-force-partuuid.cfg ] && \
|
|
grep -q ^GRUB_FORCE_PARTUUID= $CHROOT_ROOT/etc/default/grub.d/40-force-partuuid.cfg
|
|
then
|
|
return 0
|
|
fi
|
|
sed -i -e "s,root=[^ ]*,root=LABEL=${fs_label}," \
|
|
"$CHROOT_ROOT/boot/grub/grub.cfg"
|
|
}
|
|
|
|
|
|
# When running update-grub in a chroot on a build host, we don't want it to
|
|
# probe for disks or probe for other installed OSes. Extract common
|
|
# diversion wrappers, so this isn't reinvented differently for each image.
|
|
divert_grub() {
|
|
CHROOT_ROOT="$1"
|
|
|
|
chroot "$CHROOT_ROOT" dpkg-divert --local \
|
|
--rename /usr/sbin/grub-probe
|
|
chroot "$CHROOT_ROOT" touch /usr/sbin/grub-probe
|
|
chroot "$CHROOT_ROOT" chmod +x /usr/sbin/grub-probe
|
|
|
|
chroot "$CHROOT_ROOT" dpkg-divert --local \
|
|
--divert /etc/grub.d/30_os-prober.dpkg-divert \
|
|
--rename /etc/grub.d/30_os-prober
|
|
|
|
# Divert systemd-detect-virt; /etc/kernel/postinst.d/zz-update-grub
|
|
# no-ops if we are in a container, and the launchpad farm runs builds
|
|
# in lxd. We therefore pretend that we're never in a container (by
|
|
# exiting 1).
|
|
chroot "$CHROOT_ROOT" dpkg-divert --local \
|
|
--rename /usr/bin/systemd-detect-virt
|
|
echo "exit 1" > "$CHROOT_ROOT"/usr/bin/systemd-detect-virt
|
|
chmod +x "$CHROOT_ROOT"/usr/bin/systemd-detect-virt
|
|
}
|
|
|
|
undivert_grub() {
|
|
CHROOT_ROOT="$1"
|
|
|
|
chroot "$CHROOT_ROOT" rm /usr/sbin/grub-probe
|
|
chroot "$CHROOT_ROOT" dpkg-divert --remove --local \
|
|
--rename /usr/sbin/grub-probe
|
|
|
|
chroot "$CHROOT_ROOT" dpkg-divert --remove --local \
|
|
--divert /etc/grub.d/30_os-prober.dpkg-divert \
|
|
--rename /etc/grub.d/30_os-prober
|
|
|
|
rm "$CHROOT_ROOT"/usr/bin/systemd-detect-virt
|
|
chroot "$CHROOT_ROOT" dpkg-divert --remove --local \
|
|
--rename /usr/bin/systemd-detect-virt
|
|
}
|
|
|
|
recreate_initramfs() {
|
|
# Regenerate the initramfs by running update-initramfs in the
|
|
# chroot at $1 and copying the generated initramfs
|
|
# around. Beware that this was written for a single use case
|
|
# (live-server) and may not work in all cases without
|
|
# tweaking...
|
|
# config/binary must be sourced before calling this function.
|
|
CHROOT="$1"
|
|
# Start by cargo culting bits of lb_chroot_hacks:
|
|
if [ -n "$LB_INITRAMFS_COMPRESSION" ]; then
|
|
echo "COMPRESS=$LB_INITRAMFS_COMPRESSION" > "$CHROOT"/etc/initramfs-tools/conf.d/livecd-rootfs.conf
|
|
fi
|
|
chroot "$CHROOT" sh -c "${UPDATE_INITRAMFS_OPTIONS:-} update-initramfs -k all -t -u"
|
|
rm -rf "$CHROOT"/etc/initramfs-tools/conf.d/livecd-rootfs.conf
|
|
# Then bits of lb_binary_linux-image:
|
|
case "${LB_INITRAMFS}" in
|
|
casper)
|
|
DESTDIR="binary/casper"
|
|
;;
|
|
|
|
live-boot)
|
|
DESTDIR="binary/live"
|
|
;;
|
|
|
|
*)
|
|
DESTDIR="binary/boot"
|
|
;;
|
|
esac
|
|
mv "$CHROOT"/boot/initrd.img-* $DESTDIR
|
|
}
|