126 lines
3.7 KiB
Bash
Executable File
126 lines
3.7 KiB
Bash
Executable File
#!/bin/sh
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# Copyright (c) 2024 Pedro <copyright@cas.cat>
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# SPDX-License-Identifier: AGPL-3.0-or-later
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set -e
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set -u
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# DEBUG
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set -x
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install_dependencies() {
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apt update
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apt install -y wget dnsmasq nfs-kernel-server rsync
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}
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backup_file() {
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target="${1}"
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ts="$(date +'%Y-%m-%d_%H-%M-%S')"
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if [ -f "${target}" ]; then
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cp -a "${target}" "${target}_bak_${ts}"
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fi
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}
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install_nfs() {
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backup_file /etc/exports
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# debian live nfs path is readonly, do a trick
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# to make snapshots subdir readwrite
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if ! grep -q "/snapshots" /proc/mounts; then
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mkdir -p "/snapshots"
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mount --bind "${nfs_path}/snapshots" "/snapshots"
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fi
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cat > /etc/exports <<END
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${nfs_path} ${nfs_allowed_lan}(rw,sync,no_subtree_check,no_root_squash)
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/snapshots ${nfs_allowed_lan}(rw,sync,no_subtree_check,no_root_squash)
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END
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# reload nfs exports
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exportfs -vra
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# append live directory, which is expected by the debian live env
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mkdir -p "${nfs_path}/live"
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mkdir -p "${nfs_path}/snapshots"
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if [ ! -f "${nfs_path}/settings.ini" ]; then
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if [ -f "settings.ini" ]; then
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cp settings.ini "${nfs_path}/settings.ini"
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else
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echo "ERROR: $(pwd)/settings.ini does not exist yet, cannot read config from there. You can take inspiration with file $(pwd)/settings.ini.example"
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exit 1
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fi
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fi
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}
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install_tftp() {
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# from https://wiki.debian.org/PXEBootInstall#Simple_way_-_using_Dnsmasq
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cat > /etc/dnsmasq.d/pxe-tftp <<END
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port=0
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# info: https://wiki.archlinux.org/title/Dnsmasq#Proxy_DHCP
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dhcp-range=${nfs_allowed_lan%/*},proxy
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dhcp-boot=pxelinux.0
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pxe-service=x86PC,"Network Boot",pxelinux
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enable-tftp
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tftp-root=${tftp_path}
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END
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}
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install_netboot() {
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# if you want to refresh install, remove or move dir
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if [ ! -d "${tftp_path}" ] || [ "${FORCE:-}" ]; then
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mkdir -p "${tftp_path}/pxelinux.cfg"
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cd "${tftp_path}"
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if [ ! -f "${tftp_path}/netboot.tar.gz" ]; then
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wget http://ftp.debian.org/debian/dists/${VERSION_CODENAME}/main/installer-amd64/current/images/netboot/netboot.tar.gz
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tar xvf netboot.tar.gz || true
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rm -rf "${tftp_path}/pxelinux.cfg"
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mkdir -p "${tftp_path}/pxelinux.cfg"
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fi
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cp -fv "${PXE_DIR}/../iso/staging/live/vmlinuz" "${tftp_path}/"
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cp -fv "${PXE_DIR}/../iso/staging/live/initrd" "${tftp_path}/"
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rsync -av "${PXE_DIR}/../iso/staging/live/filesystem.squashfs" "${nfs_path}/live/"
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cat > "${tftp_path}/pxelinux.cfg/default" <<END
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default wb
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label wb
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KERNEL vmlinuz
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INITRD initrd
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APPEND ip=dhcp netboot=nfs nfsroot=${server_ip}:${nfs_path}/ boot=live text forcepae
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END
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cd -
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fi
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}
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init_config() {
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# get where the script is
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cd "$(dirname "${0}")"
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PXE_DIR="$(pwd)"
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if [ -f ./.env ]; then
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. ./.env
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else
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echo "PXE: WARNING: $(pwd)/.env does not exist yet, cannot read config from there. You can take inspiration with file $(pwd)/.env.example"
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fi
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VERSION_CODENAME="${VERSION_CODENAME:-bookworm}"
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tftp_path="${tftp_path:-/srv/pxe-tftp}"
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server_ip="${server_ip}"
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nfs_path="${nfs_path:-/srv/pxe-nfs}"
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}
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main() {
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init_config
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install_dependencies
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install_tftp
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install_nfs
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install_netboot
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echo "PXE: Installation finished"
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}
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main "${@}"
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# written in emacs
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# -*- mode: shell-script; -*-
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