forked from brl/citadel
262 lines
6.5 KiB
Bash
Executable File
262 lines
6.5 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -o errexit
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set -o nounset
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set -o xtrace
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: ${REALMFS_BUILDER_BASE:="/usr/share/realmfs-builder"}
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source ${REALMFS_BUILDER_BASE}/common.inc
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umount_if_tmpfs() {
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if findmnt -t tmpfs -M ${1} > /dev/null; then
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info "unmounting existing rootfs tmpfs"
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umount ${1}
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fi
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}
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setup_rootfs() {
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umount_if_tmpfs ${ROOTFS}
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if [[ -d ${ROOTFS} ]]; then
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info "Removing existing rootfs at ${ROOTFS}"
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rm -rf ${ROOTFS}
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fi
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mkdir --parents ${ROOTFS}
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if [[ ${USE_TMPFS} -eq 1 ]]; then
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mount -t tmpfs rootfs-tmp ${ROOTFS}
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fi
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chmod 0755 ${ROOTFS}
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}
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run_debootstrap() {
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[[ -f ${CACHE_DIR}/lock ]] && rm -f ${CACHE_DIR}/lock
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mkdir --parents ${CACHE_DIR} ${ROOTFS}/var/cache/apt/archives
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info "Bind mounting ${CACHE_DIR} to ${ROOTFS}/var/cache/apt/archives"
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mount --bind ${CACHE_DIR} ${ROOTFS}/var/cache/apt/archives
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info "Launching debootstrap"
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debootstrap --verbose --merged-usr --variant=minbase \
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--include=systemd-sysv,locales \
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${DEBIAN_RELEASE} ${ROOTFS} ${DEBIAN_MIRROR}
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}
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setup_chroot() {
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mount chproc ${ROOTFS}/proc -t proc
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mount chsys ${ROOTFS}/sys -t sysfs
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mount chtmp ${ROOTFS}/tmp -t tmpfs
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# Install a copy of realmfs-builder inside new image
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mkdir -p ${ROOTFS}/usr/share
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cp -a ${REALMFS_BUILDER_BASE} ${ROOTFS}/usr/share
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ln -s /usr/share/realmfs-builder/stage-one.sh ${ROOTFS}/usr/bin/realmfs-builder
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# $BUILDFILE and any extra files go in /tmp/realmfs-build of rootfs
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mkdir -p ${ROOTFS}/tmp/realmfs-build
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cp ${BUILDFILE} ${ROOTFS}/tmp/realmfs-build/build.conf
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}
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cleanup_chroot() {
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umount ${ROOTFS}/proc
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umount ${ROOTFS}/sys
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umount ${ROOTFS}/tmp
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umount ${ROOTFS}/var/cache/apt/archives
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# Remove cache files in case we are creating a tarball for distribution
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rm -f ${ROOTFS}/var/cache/apt/pkgcache.bin
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rm -f ${ROOTFS}/var/cache/apt/srcpkgcache.bin
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}
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run_chroot_stage() {
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setup_chroot
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#
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# Run second-stage.sh inside chroot(), pass in various environment variables
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#
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DEBIAN_FRONTEND=noninteractive \
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DEBCONF_NONINTERACTIVE_SEEN=true \
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LC_ALL=C LANGUAGE=C LANG=C \
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DEBIAN_RELEASE=${DEBIAN_RELEASE} DEBIAN_MIRROR=${DEBIAN_MIRROR} \
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chroot ${ROOTFS} /usr/share/realmfs-builder/stage-two.sh /tmp/realmfs-build/build.conf
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info "chroot installation stage finished, cleaning chroot setup"
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cleanup_chroot
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}
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generate_tarball() {
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local tarball=${WORKDIR}/realmfs-rootfs.tar
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info "----- Generating rootfs tarball -----"
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tar -C ${ROOTFS} --numeric-owner -c --xattrs --xattrs-include=* -f $tarball .
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if [[ ${DO_XZ} -eq 1 ]]; then
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info "Compressing $tarball"
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xz --force --threads=0 $tarball
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tarball=${tarball}.xz
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fi
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echo
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ls -hl $tarball
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echo
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}
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generate_image() {
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# BLOCKS=$(du -ks ${ROOTFS} | cut -f1)
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# BLOCKS=$(expr ${BLOCKS} \* 12 / 10)
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# SIZE=$(expr ${BLOCKS} \* 1024)
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# echo "Size is ${SIZE}"
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BLOCKS=$(expr 440 \* 1024)
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# allow online resize up to 32G
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dd if=/dev/zero of=${WORKDIR}/citadel-realmfs.ext4 seek=${BLOCKS} count=0 bs=4096
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mkfs.ext4 -d ${ROOTFS} -i 4096 -b 4096 -F ${WORKDIR}/citadel-realmfs.ext4 ${BLOCKS} || exit 1
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}
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usage() {
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cat <<-EOF
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USAGE: realmfs-builder [options] [config-file]
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OPTIONS
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--new Create a configuration file template called build.conf in the current directory
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-d <directory> Choose a non-default directory for build output (currently: $(pwd)/realmfs)
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-t Create a tarball but don't compress it
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-z Create a tarball compressed with xz
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--no-tmpfs Do not use tmpfs as rootfs build directory
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--no-confirm Do not ask for confirmation before beginning
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For more documentation see /usr/share/realmfs-builder/README
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EOF
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exit 0
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}
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ask_confirm() {
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local use_tmpfs="No"
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[[ ${USE_TMPFS} -eq 1 ]] && use_tmpfs="Yes"
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printf "About to build RealmFS image with the following parameters:\n\n"
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printf "\tBuild Configuration File : ${BUILDFILE}\n"
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printf "\tOutput rootfs directory : ${ROOTFS}\n"
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printf "\tBuild rootfs on tmpfs : ${use_tmpfs}\n"
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[[ -e ${ROOTFS} ]] && printf "\nWarning: rootfs directory from a prior build exists and will be deleted before building new image\n\n"
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read -p "Ok to proceed? (y/N): " confirm
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[[ $confirm =~ ^[Yy] ]] || exit 0
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}
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try_config() {
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local rp
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rp=$(realpath ${1} 2> /dev/null) || return 1
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[[ -f ${rp} ]] || return 1
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printf "${rp}"
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}
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WORKDIR="$(pwd)/realmfs"
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BUILDFILE=""
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DO_TAR=0
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DO_XZ=0
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USE_TMPFS=1
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NO_CONFIRM=0
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DO_IMG=0
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while [[ $# -gt 0 ]]; do
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key=${1}
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case $key in
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-d)
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mkdir -p "${2}"
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WORKDIR="$(realpath ${2})"
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shift
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shift
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;;
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-t)
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DO_TAR=1
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shift
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;;
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-z)
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DO_TAR=1 DO_XZ=1
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shift
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;;
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-i)
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DO_IMG=1
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shift
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;;
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--no-tmpfs)
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USE_TMPFS=0
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shift
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;;
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--no-confirm)
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NO_CONFIRM=1
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shift
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;;
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--new)
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cp --verbose ${REALMFS_BUILDER_BASE}/build-template.conf build.conf
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exit 0
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;;
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--help|-h|help)
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usage
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;;
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-*)
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printf "Unknown option ${key}\n"
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usage
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;;
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*)
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BUILDFILE=$(try_config ${1}) || fatal "Cannot find config file '${1}'"
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shift
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;;
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esac
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done
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if [ "$EUID" -ne 0 ]; then
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echo "The realmfs-builder must be run with root privileges."
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exit 1
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fi
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if [[ -z ${BUILDFILE} ]]; then
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BUILDFILE=$(try_config "${PWD}/build.conf" || try_config "${REALMFS_BUILDER_BASE}/basic-image.conf") || fatal "Could not find a configuration file to use"
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fi
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ROOTFS=${WORKDIR}/rootfs
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CACHE_DIR=${WORKDIR}/var-cache-apt-archives
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[[ ${NO_CONFIRM} -ne 1 ]] && ask_confirm
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# black magick from stack overflow
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exec > >(tee -a $WORKDIR/realmfs-build.log) 2>&1
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info "Starting build of RealmFS image from configuration file ${BUILDFILE}"
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source ${BUILDFILE}
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setup_rootfs
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run_debootstrap
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run_chroot_stage
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info "rootfs build is completed:"
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info " $(du -sh ${ROOTFS})"
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if [[ ${DO_IMG} -eq 1 ]]; then
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generate_image
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elif [[ ${DO_TAR} -eq 1 ]]; then
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generate_tarball
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fi
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if [[ ${USE_TMPFS} -eq 1 ]]; then
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info "Root directory is a tmpfs. To remove mount and directory contents:"
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info " sudo umount ${ROOTFS}"
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fi
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