mirror of
https://github.com/kata-containers/kata-containers.git
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a9fef80feb
In case host not has requried programs allow build image in a container when USE_DOCKER is set. Signed-off-by: Jose Carlos Venegas Munoz <jose.carlos.venegas.munoz@intel.com>
168 lines
4.0 KiB
Bash
Executable File
168 lines
4.0 KiB
Bash
Executable File
#!/bin/bash
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#
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# Copyright (c) 2017 Intel Corporation
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#
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# SPDX-License-Identifier: Apache-2.0
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set -e
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script_name="${0##*/}"
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script_dir="$(dirname $(readlink -f $0))"
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if [ -n "$DEBUG" ] ; then
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set -x
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fi
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SCRIPT_NAME="${0##*/}"
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IMAGE="${IMAGE:-kata-containers.img}"
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AGENT_BIN=${AGENT_BIN:-kata-agent}
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die()
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{
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local msg="$*"
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echo "ERROR: ${msg}" >&2
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exit 1
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}
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OK()
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{
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local msg="$*"
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echo "[OK] ${msg}" >&2
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}
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info()
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{
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local msg="$*"
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echo "INFO: ${msg}"
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}
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usage()
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{
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error="${1:-0}"
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cat <<EOT
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Usage: ${SCRIPT_NAME} [options] <rootfs-dir>
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This script will create a Kata Containers image file based on the
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<rootfs-dir> directory.
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Options:
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-h Show this help
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-o path to generate image file ENV: IMAGE
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-s Image size in MB (default $IMG_SIZE) ENV: IMG_SIZE
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Extra environment variables:
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AGENT_BIN: use it to change the expected agent binary name"
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USE_DOCKER: If set will build image in a Docker Container (requries docker)
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DEFAULT: not set
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EOT
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exit "${error}"
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}
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while getopts "ho:s:" opt
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do
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case "$opt" in
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h) usage ;;
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o) IMAGE="${OPTARG}" ;;
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s) IMG_SIZE="${OPTARG}" ;;
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esac
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done
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shift $(( $OPTIND - 1 ))
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ROOTFS="$1"
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[ -n "${ROOTFS}" ] || usage
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[ -d "${ROOTFS}" ] || die "${ROOTFS} is not a directory"
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ROOTFS=$(readlink -f ${ROOTFS})
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IMAGE_DIR=$(dirname ${IMAGE})
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IMAGE_DIR=$(readlink -f ${IMAGE_DIR})
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IMAGE_NAME=$(basename ${IMAGE})
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if [ -n "${USE_DOCKER}" ] ; then
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image_name="image-builder-osbuilder"
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docker build \
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--build-arg http_proxy="${http_proxy}" \
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--build-arg https_proxy="${https_proxy}" \
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-t "${image_name}" "${script_dir}"
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#Make sure we use a compatible runtime to build rootfs
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# In case Clear Containers Runtime is installed we dont want to hit issue:
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#https://github.com/clearcontainers/runtime/issues/828
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docker run \
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--runtime runc \
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--privileged \
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--env IMG_SIZE="${IMG_SIZE}" \
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-v /dev:/dev \
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-v "${script_dir}":"/osbuilder" \
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-v "${ROOTFS}":"/rootfs" \
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-v "${IMAGE_DIR}":"/image" \
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${image_name} \
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bash "/osbuilder/${script_name}" -o "/image/${IMAGE_NAME}" /rootfs
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exit $?
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fi
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# The kata rootfs image expect init and kata-agent to be installed
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init="${ROOTFS}/sbin/init"
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[ -x "${init}" ] || [ -L ${init} ] || die "/sbin/init is not installed in ${ROOTFS_DIR}"
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OK "init is installed"
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[ -x "${ROOTFS}/bin/${AGENT_BIN}" ] || \
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die "/bin/${AGENT_BIN} is not installed in ${ROOTFS}
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use AGENT_BIN env variable to change the expected agent binary name"
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OK "Agent installed"
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[ "$(id -u)" -eq 0 ] || die "$0: must be run as root"
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BLOCK_SIZE=${BLOCK_SIZE:-4096}
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IMG_SIZE=${IMG_SIZE:-80}
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info "Creating raw disk with size ${IMG_SIZE}M"
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qemu-img create -q -f raw "${IMAGE}" "${IMG_SIZE}M"
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OK "Image file created"
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# Kata runtime expect an image with just one partition
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# The partition is the rootfs content
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info "Creating partitions"
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parted "${IMAGE}" --script "mklabel gpt" \
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"mkpart ext4 1M -1M"
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OK "Partitions created"
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# Get the loop device bound to the image file (requires /dev mounted in the
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# image build system and root privileges)
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DEVICE=$(losetup -P -f --show "${IMAGE}")
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#Refresh partition table
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partprobe "${DEVICE}"
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MOUNT_DIR=$(mktemp -d osbuilder-mount-dir.XXXX)
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info "Formating Image using ext4 format"
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mkfs.ext4 -q -F -b "${BLOCK_SIZE}" "${DEVICE}p1"
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OK "Image formated"
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info "Mounting root paratition"
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mount "${DEVICE}p1" "${MOUNT_DIR}"
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OK "root paratition mounted"
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RESERVED_BLOCKS_PERCENTAGE=3
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info "Set filesystem reserved blocks percentage to ${RESERVED_BLOCKS_PERCENTAGE}%"
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tune2fs -m "${RESERVED_BLOCKS_PERCENTAGE}" "${DEVICE}p1"
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#TODO: Calculate disk size based on rootfs
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#FIXME: https://github.com/kata-containers/osbuilder/issues/2
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ROOTFS_SIZE=$(du -B 1MB -s "${ROOTFS}" | awk '{print $1}')
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AVAIL_DISK=$(df -B M --output=avail "${DEVICE}p1" | tail -1)
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AVAIL_DISK=${AVAIL_DISK/M}
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info "Free space root partition ${AVAIL_DISK} MB"
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info "rootfs size ${ROOTFS_SIZE} MB"
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info "Copying content from rootfs to root partition"
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cp -a "${ROOTFS}"/* ${MOUNT_DIR}
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OK "rootfs copied"
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# Cleanup
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sync
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umount -l ${MOUNT_DIR}
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fsck -D -y "${DEVICE}p1"
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losetup -d "${DEVICE}"
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info "Image created"
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