178 lines
7.5 KiB
Bash
Executable File
178 lines
7.5 KiB
Bash
Executable File
#!/bin/bash
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# Generate a PVC autoinstaller ISO
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# This ISO makes a number of assumptions about the system and asks
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# minimal questions in order to streamline the install process versus
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# using a standard Debian intaller ISO. The end system is suitable
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# for immediate bootstrapping with the PVC Ansible roles.
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fail() {
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echo "$@"
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exit 1
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}
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which debootstrap &>/dev/null || fail "This script requires debootstrap."
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which mksquashfs &>/dev/null || fail "This script requires squashfs-tools."
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which xorriso &>/dev/null || fail "This script requires xorriso."
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test -f /usr/lib/ISOLINUX/isohdpfx.bin &>/dev/null || fail "This script requires isolinux."
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isofilename="pvc-installer_$(date +%Y-%m-%d).iso"
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srcliveisopath="https://cdimage.debian.org/mirror/cdimage/release/current-live/amd64/iso-hybrid"
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srcliveisofilename="$( wget -O- ${srcliveisopath}/ | grep 'debian-live-.*-amd64-standard.iso' | awk -F '"' '{ print $6 }' )"
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srcliveisourl="${srcliveisopath}/${srcliveisofilename}"
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show_help() {
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echo -e "PVC install ISO generator"
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echo
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echo -e " Generates a mostly-automated installer ISO for a PVC node base system. The ISO"
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echo -e " boots, then runs 'install.sh' to perform the installation to a target server."
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echo -e " This script prompts for a few questions on startup to configure the system, then"
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echo -e " performs the remaining installation to PVC node specifications unattended,"
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echo -e " including configuring networking on the selected interface, wiping the selected"
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echo -e " disk, partitioning, installing the base OS, and performing some initial"
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echo -e " configuration to allow the PVC Ansible role to take over after completion."
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echo
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echo -e "Usage: $0 [-h] [-o <output_filename>] [-s <liveiso_source_url>] [-a]"
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echo
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echo -e " -h: Display this help message."
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echo -e " -o: Create the ISO as <output_filename> instead of the default."
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echo -e " -s: Obtain the source Debian Live ISO from <liveiso_source_url> instead of"
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echo -e " the default."
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echo -e " -a: Use cached squashfs artifact during rebuild (cached ISO and debootstrap"
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echo -e " artifacts are always used)."
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}
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while getopts "h?o:s:a" opt; do
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case "$opt" in
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h|\?)
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show_help
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exit 0
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;;
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o)
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isofilename=$OPTARG
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;;
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s)
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srcliveisourl=$OPTARG
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;;
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a)
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usecachedsquashfs='y'
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;;
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esac
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done
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srcliveisofile="$( basename ${srcliveisourl} )"
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tempdir=$( mktemp -d )
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cleanup() {
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echo -n "Cleaning up... "
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sudo rm -rf ${tempdir} &>/dev/null
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echo "done."
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echo
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}
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fail() {
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echo $@
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cleanup
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exit 1
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}
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prepare_iso() {
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echo -n "Creating temporary directories... "
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if [[ ! -d artifacts ]]; then
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mkdir artifacts &>/dev/null || fail "Error creating artifacts directory."
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fi
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mkdir ${tempdir}/rootfs/ ${tempdir}/installer/ &>/dev/null || fail "Error creating temporary directories."
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echo "done."
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if [[ ! -f artifacts/${srcliveisofile} ]]; then
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echo -n "Downloading Debian Live ISO... "
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wget -O artifacts/${srcliveisofile} ${srcliveisourl} &>/dev/null || { rm -f artifacts/${srcliveisofile}; fail "Error downloading source ISO."; }
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echo "done."
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fi
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echo -n "Extracting Debian Live ISO files... "
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iso_tempdir=$( mktemp -d )
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sudo mount artifacts/${srcliveisofile} ${iso_tempdir} &>/dev/null || fail "Error mounting Live ISO file."
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sudo rsync -au --exclude live/filesystem.squashfs ${iso_tempdir}/ ${tempdir}/installer/ &>/dev/null || fail "Error extracting Live ISO files."
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sudo umount ${iso_tempdir} &>/dev/null || fail "Error unmounting Live ISO file."
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rmdir ${iso_tempdir} &>/dev/null
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echo "done."
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}
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prepare_rootfs() {
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echo -n "Preparing Debian live installation via debootstrap... "
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SQUASHFS_PKGLIST="mdadm,lvm2,parted,gdisk,debootstrap,grub-pc,grub-efi-amd64,linux-image-amd64,sipcalc,live-boot,dosfstools,vim,ca-certificates"
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if [[ ! -d artifacts/debootstrap ]]; then
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sudo /usr/sbin/debootstrap \
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--include=${SQUASHFS_PKGLIST} \
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buster \
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artifacts/debootstrap/ \
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http://ftp.ca.debian.org/debian &>debootstrap.log || fail "Error performing debootstrap."
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sudo chroot artifacts/debootstrap/ apt clean &>/dev/null || fail "Error cleaning apt cache in debootstrap."
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fi
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sudo rsync -au artifacts/debootstrap/ ${tempdir}/rootfs/ &>/dev/null || fail "Error copying debootstrap to tempdir."
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echo "done."
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echo -n "Configuring Debian live installation... "
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sudo cp -a artifacts/debootstrap/boot/vmlinuz* ${tempdir}/installer/live/vmlinuz &>/dev/null || fail "Error copying kernel."
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sudo cp -a artifacts/debootstrap/boot/initrd.img* ${tempdir}/installer/live/initrd.img &>/dev/null || fail "Error copying initrd."
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sudo cp ${tempdir}/rootfs/lib/systemd/system/getty\@.service ${tempdir}/rootfs/etc/systemd/system/getty@tty1.service &>/dev/null || fail "Error copying getty override to tempdir."
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sudo sed -i 's|/sbin/agetty|/sbin/agetty --autologin root|g' \
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${tempdir}/rootfs/etc/systemd/system/getty@tty1.service &>/dev/null || fail "Error setting autologin in getty override."
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sudo tee ${tempdir}/rootfs/etc/hostname <<<"pvc-node-installer" &>/dev/null || fail "Error setting hostname."
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sudo tee -a ${tempdir}/rootfs/root/.bashrc <<<"/install.sh" &>/dev/null || fail "Error setting bashrc."
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sudo chroot ${tempdir}/rootfs/ /usr/bin/passwd -d root &>/dev/null || fail "Error disabling root password."
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sudo cp install.sh ${tempdir}/rootfs/ &>/dev/null || fail "Error copying install.sh to tempdir."
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echo "done."
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echo -n "Generating squashfs image of live installation... "
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if [[ ! -f artifacts/filesystem.squashfs || -z ${usecachedsquashfs} ]]; then
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if [[ -f artifacts/filesystem.squashfs ]]; then
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rm -f artifacts/filesystem.squashfs &>/dev/null
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fi
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sudo nice mksquashfs ${tempdir}/rootfs/ artifacts/filesystem.squashfs -e boot &>/dev/null || fail "Error generating squashfs."
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fi
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sudo cp artifacts/filesystem.squashfs ${tempdir}/installer/live/filesystem.squashfs &>/dev/null || fail "Error copying squashfs to tempdir."
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echo "done."
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}
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build_iso() {
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echo -n "Copying live boot configurations... "
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sudo cp -a grub.cfg ${tempdir}/installer/boot/grub/grub.cfg &>/dev/null || fail "Error copying grub.cfg file."
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sudo cp -a theme.txt ${tempdir}/installer/boot/grub/theme.txt &>/dev/null || fail "Error copying theme.txt file."
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sudo cp -a isolinux.cfg ${tempdir}/installer/isolinux/isolinux.cfg &>/dev/null || fail "Error copying isolinux.cfg file."
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sudo cp -a splash.png ${tempdir}/installer/splash.png &>/dev/null || fail "Error copying splash.png file."
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echo "done."
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echo -n "Creating LiveCD ISO... "
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pushd ${tempdir}/installer &>/dev/null
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xorriso -as mkisofs \
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-isohybrid-mbr /usr/lib/ISOLINUX/isohdpfx.bin \
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-c isolinux/boot.cat \
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-b isolinux/isolinux.bin \
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-no-emul-boot \
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-boot-load-size 4 \
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-boot-info-table \
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-eltorito-alt-boot \
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-e boot/grub/efi.img \
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-no-emul-boot \
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-isohybrid-gpt-basdat \
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-o ../${isofilename} \
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. &>/dev/null || fail "Error creating ISO file."
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popd &>/dev/null
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echo "done."
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echo -n "Moving generated ISO to './${isofilename}'... "
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mv ${tempdir}/${isofilename} ${isofilename} &>/dev/null || fail "Error moving ISO file."
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echo "done."
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}
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prepare_iso
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prepare_rootfs
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build_iso
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cleanup
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echo "PVC Live Installer ISO generation complete."
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