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125 lines
3.9 KiB
125 lines
3.9 KiB
CLOUD_IMG_STR="# CLOUD_IMG: This file was created/modified by the Cloud Image build process"
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IMAGE_SIZE=$((2252*1024**2)) # 2.2G (the current size we ship)
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rootfs_dev_mapper=
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loop_device=
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loop_raw=
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clean_loops() {
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[ -z "${rootfs_dev_mapper}" ] || {
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udevadm settle
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find /dev/mapper -iname "${loop_device///dev\//}*" | \
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xargs -n1 -I DEVICE dmsetup remove DEVICE ||
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kpartx -d "${rootfs_dev_mapper}"
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losetup -d "${loop_device}" || echo "Failed to detach disk"
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unset loop_raw
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}
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}
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create_empty_disk_image() {
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# Prepare an empty disk image
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dd if=/dev/zero of="$1" bs=1 count=0 seek="${IMAGE_SIZE}"
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}
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make_ext4_partition() {
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device="$1"
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mkfs.ext4 -F -b 4096 -i 8192 -m 0 -L cloudimg-rootfs -E resize=536870912 "$device"
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}
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mount_image() {
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apt-get install -qqy kpartx
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trap clean_loops EXIT
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loop_raw="$(kpartx -s -v -a "$1" )"
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loop_device="$(echo -e "${loop_raw}" | head -n1 | awk '{print($(NF-1))}')"
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rootfs_dev_mapper="/dev/mapper${loop_device///dev/}p1"
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[ ! -b "${rootfs_dev_mapper}" ] &&
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echo "${rootfs_dev_mapper} is not a block device" && exit 1
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return 0
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}
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mount_partition() {
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partition="$1"
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mountpoint="$2"
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mount "$partition" "$mountpoint"
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mount --bind /dev "$mountpoint/dev"
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mount proc-live -t proc "$mountpoint/proc"
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mount sysfs-live -t sysfs "$mountpoint/sys"
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mv "$mountpoint/etc/resolv.conf" resolv.conf.tmp
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cp /etc/resolv.conf "$mountpoint/etc/resolv.conf"
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}
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umount_partition() {
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mountpoint="$1"
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mv resolv.conf.tmp "$mountpoint/etc/resolv.conf"
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umount "$mountpoint/proc"
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umount "$mountpoint/sys"
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umount "$mountpoint/dev"
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umount "$mountpoint"
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}
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modify_vmdk_header() {
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# Modify the VMDK headers so that both VirtualBox _and_ VMware can
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# read the vmdk and import them. The vodoo here is _not_ documented
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# anywhere....so this will have to do.
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vmdk_name="${1}"
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descriptor=$(mktemp)
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newdescriptor=$(mktemp)
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# Extract the vmdk header for manipulation
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dd if="${vmdk_name}" of="${descriptor}" bs=1 skip=512 count=1024
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# The sed lines below is where the magic is. Specifically:
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# ddb.toolsVersion: sets the open-vm-tools so that VMware shows
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# the tooling as current
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# ddb.virtualHWVersion: set the version to 7, which covers most
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# current versions of VMware
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# createType: make sure its set to stream Optimized
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# remove the vmdk-stream-converter comment and replace with
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# # Disk DescriptorFile. This is needed for Virtualbox
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# remove the comments from vmdk-stream-converter which causes
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# VirtualBox and others to fail VMDK validation
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sed -e 's|ddb.comment.*|ddb.toolsVersion = "2147483647"|' \
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-e 's|ddb.virtualHWVersion.*|ddb.virtualHWVersion = "7"|' \
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-e 's|createType.*|createType="streamOptimized"|' \
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-e 's|# Description file.*|# Disk DescriptorFile|' \
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-e '/# Believe.*/d' \
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-e '/# Indicates no parent/d' \
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"${descriptor}" > "${new_descriptor}"
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# The header is cannot be bigger than 1024
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expr $(stat --format=%s ${new_descriptor}) \< 1024 || {
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echo "descriptor is too large, VMDK will be invalid!"; exit 1; }
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# Overwrite the vmdk header with our new, modified one
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dd conv=notrunc,nocreat \
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if="${new_descriptor}" of="${vmdk_name}" \
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bs=1 seek=512 count=1024
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rm ${descriptor} ${new_descriptor}
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}
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create_vmdk() {
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src="$1"
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destination="$2"
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size="${3:-102400}"
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apt-get install -qqy qemu-utils vmdk-stream-converter
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streamconverter="/usr/share/pyshared/VMDKstream.py"
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scratch_d=$(mktemp -d)
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cp ${src} ${scratch_d}/resize.img
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qemu-img resize ${scratch_d}/resize.img ${size}M
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python ${streamconverter} ${scratch_d}/resize.img "${destination}"
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modify_vmdk_header "${destination}"
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qemu-img info "${destination}"
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rm -rf ${scratch_d}
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}
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