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Commit the new version of the project
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‎.gitignore

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images/
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variables.cfg
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password_hash

‎LICENSE

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Apache License
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‎build.sh

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#!/bin/bash
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#FIXME: setup binfmt handlers for qemu. This must be done inside dind
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docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
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# Fail on any error. We don't want do break existing images
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set -e
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if [ "$1" != "main_section" ] ; then
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echo "Running build in docker container"
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docker run \
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--privileged \
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--cgroupns=host \
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-v /sys/fs/cgroup:/sys/fs/cgroup:rw \
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-v /dev:/dev \
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-v `pwd`:/k8r \
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--rm \
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-it \
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arm64v8/ubuntu \
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/bin/bash /k8r/build.sh main_section mode=$1
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exit $?
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fi
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MODE=`echo $1 | sed 's/mode=//g'`
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# the scripts are ran from project's directory, not some installation path
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cd `dirname $0`
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source ./variables.cfg
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if [ -z "$IMAGE" -o -z "$K8S_VERSION" ] ; then
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echo "Please configure variables.cfg before running this script"
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exit 1
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fi
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# include sbin dirs, in particular, for parted
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export PATH=/sbin:/usr/sbin:/usr/local/sbin:$PATH
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if [ "`losetup`" != "" ] ; then
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echo "Some files are already mounted with losetup command."
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echo "This could be leftovers of a previous failed run of this script."
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echo "Please check the output of 'losetup' command, detach the loopback"
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echo "devices with 'losetup -d LOOPBACK_DEVICE_HERE' and re-run."
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exit 1
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fi
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# inject variables.cfg into images. No other actions will be done
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if [ "$MODE" = "inject-config" ] ; then
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echo "Injecting variables into image images/image.img"
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mount -o loop images/image.img /mnt
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cp variables.cfg /mnt/usr/lib/k8r/variables.cfg
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umount /mnt
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echo "Injecting variables into image images/bootable_image.img"
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LODEV=`losetup -P -f --show images/bootable_image.img`
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mount ${LODEV}p1 /mnt
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cp variables.cfg /mnt/usr/lib/k8r/variables.cfg
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umount /mnt
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losetup -d $LODEV
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echo "Done injecting variables"
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exit
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fi
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echo "Installing dependencies"
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apt -y update
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apt -y install parted udev whois xz-utils bc
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echo "Partitions on image $IMAGE:"
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parted -s $IMAGE print
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if [ "$?" != 0 ] ; then
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echo "Image $IMAGE seems to be invalid."
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echo "Please try another image."
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exit 1
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fi
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if [ ! -r images ] ; then
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echo "Directory 'images' does not exist yet, creating it now"
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mkdir images
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fi
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#This is going to be a resulting image which can be flashed onto nodes' disk
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echo "Copying original image to output directory for further modifications"
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cp $IMAGE images/bootable_image.img
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DEVICE=`losetup -P -f --show images/bootable_image.img`
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# for mmcblk* and loop* devices, set "p" suffix for partitions
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if [ "`echo $DEVICE | grep -E 'mmcblk|loop'`" != "" ] ; then
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DEVICEPART=${DEVICE}p
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else
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DEVICEPART=${DEVICE}
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fi
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echo "Preparing image for initialization"
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K8R_IMAGE_MOUNT_DIR="/mnt"
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source prepare_image.sh
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echo "Initializing image"
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if [ ! -r "$K8R_IMAGE_MOUNT_DIR/etc/resolv.conf" ] ; then
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set -e
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echo "Image does not have resolv.conf. Mounting it for bootstrap."
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# Move it if it is a dead symlink (not caught by -r), ignore any errors
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mv $K8R_IMAGE_MOUNT_DIR/etc/resolv.conf $K8R_IMAGE_MOUNT_DIR/etc/resolv.conf.bak || true
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touch $K8R_IMAGE_MOUNT_DIR/etc/resolv.conf
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mount --bind /etc/resolv.conf $K8R_IMAGE_MOUNT_DIR/etc/resolv.conf
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fi
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echo "Adding user and setting password for user ubuntu"
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chroot $K8R_IMAGE_MOUNT_DIR /usr/bin/cloud-init single -n users_groups
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if [ ! -r password_hash ] ; then
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echo "File \"password_hash\" does not exist, using password \"ubuntu\""
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PASSWD_HASH=`echo ubuntu | mkpasswd -m sha-512 -s`
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else
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echo "Using password hash from file \"password_hash\""
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PASSWD_HASH=`cat password_hash`
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fi
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sed -i 's#ubuntu:!#ubuntu:'$PASSWD_HASH'#g' $K8R_IMAGE_MOUNT_DIR/etc/shadow
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echo "Enabling password authentication via ssh"
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sed -i 's/PasswordAuthentication no/PasswordAuthentication yes/g' $K8R_IMAGE_MOUNT_DIR/etc/ssh/sshd_config
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# FIXME: if the kernel gets updated by the script below (it shouldn't), then
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# FIXME: firmware updates will NOT be included into bootable_image.img
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echo "Running bootstrap script in chroot"
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chroot $K8R_IMAGE_MOUNT_DIR /bin/bash /usr/lib/k8r/tasks/bootstrap_image.sh
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if [ "`mount | grep resolv.conf`" != "" ] ; then
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echo "Unmounting temporary resolv.conf from image"
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umount $K8R_IMAGE_MOUNT_DIR/etc/resolv.conf
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rm -f $K8R_IMAGE_MOUNT_DIR/etc/resolv.conf
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mv $K8R_IMAGE_MOUNT_DIR/etc/resolv.conf.bak $K8R_IMAGE_MOUNT_DIR/etc/resolv.conf || true
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fi
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echo "Dumping efi and firmware partition to images/boot.img.xz for use in online upgrades."
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# don't use multithreading for xz here: it would just make it slower
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dd if=${DEVICEPART}1 status=progress | xz > images/boot.img.xz
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echo "Dumping image partition to images/image.img for use in online upgrades."
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dd if=${DEVICEPART}2 of=images/image.img status=progress
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echo "Done"
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echo "Shrinking image FS to minimum possible space plus 50M reserve"
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# fsck will return non-zero if it fixes FS, so need to suppress it since
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# we have 'set -e' enabled
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e2fsck -yf images/image.img || true
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IMAGE_BLOCK_SIZE=`dumpe2fs -h images/image.img 2>/dev/null | grep 'Block size' | awk {'print $NF'}`
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IMAGE_MIN_SIZE=`resize2fs -P images/image.img | tail -n 1 | awk {'print $NF'}`
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IMAGE_SIZE_TARGET=`echo $IMAGE_MIN_SIZE+50*1024/$IMAGE_BLOCK_SIZE | bc`
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resize2fs images/image.img ${IMAGE_SIZE_TARGET}
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# xz will not overwrite an existing image, need to clean up manually
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echo "Cleanup: Removing previous images/image.img.xz, if any"
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rm -f images/image.img.xz
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echo "Compressing images/image.img to images/image.img.xz"
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xz -v -T0 images/image.img
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echo "Injecting boot.img.xz into bootable_image.img"
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cp images/boot.img.xz $K8R_IMAGE_MOUNT_DIR/
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echo "Injecting image.img.xz into bootable_image.img"
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cp images/image.img.xz $K8R_IMAGE_MOUNT_DIR/
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echo "Cleanup: detaching loop device $DEVICE"
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losetup -d $DEVICE

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