Replace old buildiso.sh with live-build script
The old script was cumbersome and complex. Replace it with a script that leverages the Debian live-build (lb) framework to simplify the script and configuration as well as minimize sprawl in the final image (~40MB savings).
This commit is contained in:
parent
246562cb65
commit
f635e7010c
255
buildiso.sh
255
buildiso.sh
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@ -1,6 +1,6 @@
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#!/usr/bin/env bash
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# Generate a PVC autoinstaller ISO
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# Generate a PVC autoinstaller ISO via live-build
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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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@ -12,14 +12,8 @@ fail() {
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exit 1
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}
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fail=""
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which debootstrap &>/dev/null || fail="y"
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which mksquashfs &>/dev/null || fail="y"
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which xorriso &>/dev/null || fail="y"
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test -f /usr/lib/ISOLINUX/isohdpfx.bin &>/dev/null || fail="y"
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if [[ -n ${fail} ]]; then
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fail "This script requires debootstrap, xorriso, squashfs-tools, and isolinux"
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fi
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which lb &>/dev/null || fail "This script requires live-build"
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sudo -n true &>/dev/null || fail "The user running this script must have sudo privileges."
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isofilename="pvc-installer_$(date +%Y-%m-%d).iso"
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deployusername="deploy"
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@ -27,26 +21,18 @@ deployusername="deploy"
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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 -e " Generates a mostly-automated installer ISO for a PVC node base system via lb."
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echo
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echo -e "Usage: $0 [-h] [-o <output_filename>] [-s <liveiso_source_url>] [-a] [-u username]"
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echo -e "Usage: $0 [-h] [-o <output_filename>] [-u username] [-a]"
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echo
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echo -e " -h: Display this help message."
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echo -e " -o: Create the ISO as <output_filename> instead of the default."
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echo -e " -s: Obtain the source Debian Live ISO from <liveiso_source_url> instead of"
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echo -e " the default."
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echo -e " -a: Use cached squashfs artifact during rebuild (cached ISO and debootstrap"
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echo -e " artifacts are always used)."
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echo -e " -u: Change 'deploy' user to a new username."
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echo -e " -a: Preserve live-build artifacts."
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echo -e " -k: Preserve live-build config."
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}
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while getopts "h?o:s:au:" opt; do
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while getopts "h?o:u:ak" opt; do
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case "$opt" in
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h|\?)
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show_help
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@ -55,161 +41,102 @@ while getopts "h?o:s:au:" opt; do
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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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u)
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deployusername=$OPTARG
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;;
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a)
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preserve_artifacts='y'
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;;
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k)
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preserve_livebuild='y'
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;;
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esac
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done
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srcliveisopath="https://cdimage.debian.org/mirror/cdimage/release/current-live/amd64/iso-hybrid"
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srcliveisofilename="$( wget -O- ${srcliveisopath}/ 2>/dev/null | grep 'debian-live-.*-amd64-standard.iso' | awk -F '"' '{ print $6 }' )"
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srcliveisourl="${srcliveisopath}/${srcliveisofilename}"
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srcliveisofile="$( basename ${srcliveisourl} )"
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PACKAGE_LIST_MAIN="live-tools linux-image-amd64 mdadm lvm2 parted gdisk debootstrap grub-pc-bin grub-efi-amd64 sipcalc vim ca-certificates vlan"
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PACKAGE_LIST_NONFREE="firmware-bnx2 firmware-bnx2x"
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tempdir=$( mktemp -d )
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mkdir -p artifacts/lb
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pushd artifacts/lb
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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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# Initialize the live-build config
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lb config --distribution buster --architectures amd64 --archive-areas "main contrib non-free" --apt-recommends false
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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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# Configure the "standard" live task (no GUI)
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echo "live-task-standard" > config/package-lists/desktop.list.chroot
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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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# Add additional live packages
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echo ${PACKAGE_LIST_MAIN} > config/package-lists/installer.list.chroot
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echo ${PACKAGE_LIST_NONFREE} > config/package-lists/nonfree.list.chroot
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echo -n "Downloading Debian Live ISO... "
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if [[ ! -f artifacts/${srcliveisofile} ]]; then
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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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else
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echo "using cached file 'artifacts/${srcliveisofile}'."
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# Add root password hook
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mkdir -p config/includes.chroot/lib/live/config/
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cat <<EOF > config/includes.chroot/lib/live/config/2000-remove-root-pw
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#!/bin/sh
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echo "I: remove root password"
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passwd --delete root
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EOF
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chmod +x config/includes.chroot/lib/live/config/2000-remove-root-pw
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# Set root bashrc
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mkdir -p config/includes.chroot/root
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echo "/install.sh" > config/includes.chroot/root/.bashrc
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# Set hostname and resolv.conf
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mkdir -p config/includes.chroot/etc
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echo "pvc-live-installer" > config/includes.chroot/etc/hostname
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echo "nameserver 8.8.8.8" > config/includes.chroot/etc/resolv.conf
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# Set single vty
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mkdir -p config/includes.chroot/etc/systemd/
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cat <<EOF > config/includes.chroot/etc/systemd/logind.conf
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[Login]
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NAutoVTs=2
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EOF
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mkdir -p config/includes.chroot/etc/systemd/system/getty@.service.d
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cat <<EOF > config/includes.chroot/etc/systemd/system/getty@.service.d/override.conf
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[Service]
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ExecStart=
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ExecStart=-/sbin/agetty -o '-p -- \\\u' --autologin root --noclear %I \$TERM
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EOF
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mkdir -p config/includes.chroot/etc/systemd/system/serial-getty@.service.d
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cat <<EOF > config/includes.chroot/etc/systemd/system/serial-getty@.service.d/override.conf
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[Service]
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ExecStart=
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ExecStart=-/sbin/agetty -o '-p -- \\\u' --autologin root --noclear --keep-baud 115200,38400,9600 %I \$TERM
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EOF
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# Install GRUB config, theme, and splash
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mkdir -p config/includes.chroot/boot/grub
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cp ../../grub.cfg config/includes.chroot/boot/grub/grub.cfg
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cp ../../theme.txt config/includes.chroot/boot/grub/theme.txt
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cp ../../splash.png config/includes.chroot/splash.png
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# Install install.sh script
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cp ../../install.sh config/includes.chroot/install.sh
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chmod +x config/includes.chroot/install.sh
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# Customize install.sh script
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sed -i "s/XXDATEXX/$(date)/g" config/includes.chroot/install.sh
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sed -i "s/XXDEPLOYUSERXX/${deployusername}/g" config/includes.chroot/install.sh
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# Build the live image
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sudo lb build
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# Move the ISO image out
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cp live-image-amd64.hybrid.iso ../../${isofilename}
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# Clean up the artifacts
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if [[ -z ${preserve_artifacts} ]]; then
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sudo lb clean
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fi
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echo -n "Extracting Debian Live ISO files... "
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iso_tempdir=$( 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 -a --exclude live/filesystem.squashfs --exclude isolinux/menu.cfg --exclude isolinux/stdmenu.cfg ${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 ${iso_tempdir} &>/dev/null
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echo "done."
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}
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popd
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prepare_rootfs() {
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echo -n "Preparing Debian live installation via debootstrap... "
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SQUASHFS_PKGLIST="mdadm,lvm2,parted,gdisk,debootstrap,grub-pc,grub-efi-amd64,linux-image-amd64,sipcalc,live-boot,dosfstools,vim,ca-certificates,vlan"
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if [[ ! -d artifacts/debootstrap ]]; then
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sudo mkdir -p artifacts/debootstrap/var/cache/apt/archives &>/dev/null
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clean_me="y"
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sudo mount --bind /var/cache/apt/archives artifacts/debootstrap/var/cache/apt/archives &>/dev/null && clean_me=""
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sudo /usr/sbin/debootstrap \
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--include=${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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# Grab some additional files in non-free
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sudo wget http://ftp.ca.debian.org/debian/pool/non-free/f/firmware-nonfree/firmware-bnx2_20190114-2_all.deb -O artifacts/debootstrap/var/cache/apt/archives/firmware-bnx2_20190114-2_all.deb
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sudo chroot artifacts/debootstrap/ dpkg -i /var/cache/apt/archives/firmware-bnx2_20190114-2_all.deb || fail "Error installing supplemental package firmware-bnx2"
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sudo wget http://ftp.ca.debian.org/debian/pool/non-free/f/firmware-nonfree/firmware-bnx2x_20190114-2_all.deb -O artifacts/debootstrap/var/cache/apt/archives/firmware-bnx2x_20190114-2_all.deb
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sudo chroot artifacts/debootstrap/ dpkg -i /var/cache/apt/archives/firmware-bnx2x_20190114-2_all.deb || fail "Error installing supplemental package firmware-bnx2x"
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if [[ -n ${clean_me} ]]; then
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sudo chroot artifacts/debootstrap/ apt clean &>/dev/null || fail "Error cleaning apt cache in debootstrap."
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else
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sudo umount artifacts/debootstrap/var/cache/apt/archives &>/dev/null
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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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else
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sudo rsync -au artifacts/debootstrap/ ${tempdir}/rootfs/ &>/dev/null || fail "Error copying debootstrap to tempdir."
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echo "using cached debootstrap 'artifacts/debootstrap'."
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# Clean up the config
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if [[ -z ${preserve_livebuild} ]]; then
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sudo rm -rf artifacts/lb
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fi
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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 ${tempdir}/rootfs/etc/resolv.conf <<<"nameserver 8.8.8.8" &>/dev/null || fail "Error setting resolv.conf"
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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 ${tempdir}/rootfs/ &>/dev/null || fail "Error copying install.sh to tempdir."
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sudo sed -i "s/XXISOXX/${isofilename}/g" ${tempdir}/rootfs/install.sh &>/dev/null || fail "Error editing install.sh script."
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sudo sed -i "s/XXDEPLOYUSERXX/${deployusername}/g" ${tempdir}/rootfs/install.sh &>/dev/null || fail "Error editing install.sh script."
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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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sudo rsync -a 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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else
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sudo rsync -a artifacts/filesystem.squashfs ${tempdir}/installer/live/filesystem.squashfs &>/dev/null || fail "Error copying squashfs to tempdir."
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echo "using cached squashfs 'artifacts/filesystem.squashfs'."
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fi
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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 ${tempdir}/installer &>/dev/null
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xorriso \
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-as mkisofs \
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-iso-level 3 \
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-o ../${isofilename} \
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-full-iso9660-filenames \
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-volid "PVC_NODE_INSTALLER" \
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-isohybrid-mbr /usr/lib/ISOLINUX/isohdpfx.bin \
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-eltorito-boot \
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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-catalog isolinux/isolinux.cat \
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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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-append_partition 2 0xef boot/grub/efi.img \
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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 -f ${tempdir}/${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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