diskimage-builder/elements/vm/block-device.d/10-partition
Ben Kero 41f503fef3 Replace sfdisk partitioning with parted
A TODO was placed on the partitioning section of the vm element to
replace sfdisk with a saner (and less arcane) way of partitioning. It
suggested parted for replacement. This changeset should reproduce the
same disk label and partition layout as sfdisk, but with less ioctl
errors and version dependency. It will also ensure partition alignment.

Change-Id: I5d8d75131458b73bfb05f80f1bfa7e2970e004b3
2016-02-08 12:15:50 -08:00

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#!/bin/bash
if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
set -x
fi
set -eu
set -o pipefail
source $_LIB/die
[ -n "$IMAGE_BLOCK_DEVICE" ] || die "Image block device not set"
# Create 2 partitions for PPC, one for PReP boot and other for root
if [[ "$ARCH" =~ "ppc" ]] ; then
sudo parted -a optimal -s $IMAGE_BLOCK_DEVICE \
mklabel msdos \
mkpart primary 0 8cyl \
set 1 boot on \
set 1 prep on \
mkpart primary 9cyl 100%
else
sudo parted -a optimal -s $IMAGE_BLOCK_DEVICE \
mklabel msdos \
mkpart primary 1MiB 100% \
set 1 boot on
fi
sudo partprobe $IMAGE_BLOCK_DEVICE
# To ensure no race conditions exist from calling partprobe
sudo udevadm settle
# If the partition isn't under /dev/loop*p1, create it with kpartx
DM=
if [ ! -e "${IMAGE_BLOCK_DEVICE}p1" ]; then
DM=${IMAGE_BLOCK_DEVICE/#\/dev/\/dev\/mapper}
# If running inside Docker, make our nodes manually, because udev will not be working.
if [ -f /.dockerenv ]; then
# kpartx cannot run in sync mode in docker.
sudo kpartx -av $TMP_IMAGE_PATH
sudo dmsetup --noudevsync mknodes
else
sudo kpartx -asv $TMP_IMAGE_PATH
fi
elif [[ "$ARCH" =~ "ppc" ]]; then
sudo kpartx -asv $TMP_IMAGE_PATH
fi
if [ -n "$DM" ]; then
echo "IMAGE_BLOCK_DEVICE=${DM}p1"
elif [[ "$ARCH" =~ "ppc" ]]; then
DM=${IMAGE_BLOCK_DEVICE/#\/dev/\/dev\/mapper}
echo "IMAGE_BLOCK_DEVICE=${DM}p2"
else
echo "IMAGE_BLOCK_DEVICE=${IMAGE_BLOCK_DEVICE}p1"
fi