108 lines
2.8 KiB
Bash
Executable File
108 lines
2.8 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
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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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cat > /etc/exports <<END
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${nfs_path} ${nfs_allowed_lan}(rw,sync,no_subtree_check,no_root_squash)
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END
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# append live directory, which is expected by the debian live env
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mkdir -p "${nfs_path}/live"
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}
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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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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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extract_live_parts_for_tftp() {
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if [ ! -f /tmp/live.iso ]; then
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# src https://www.debian.org/CD/faq/#newest
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DEBIAN_VERSION="$(wget https://www.debian.org/CD/ -O- \
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| grep -o '<strong>[0-9.]*</strong>' \
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| grep -o '[0-9.]*')"
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url="https://cdimage.debian.org/debian-cd/current-live/amd64/iso-hybrid/debian-live-${DEBIAN_VERSION}-amd64-standard.iso"
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wget "${url}" -O /tmp/live.iso
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fi
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mount -o loop /tmp/live.iso /mnt/
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cp /mnt/live/vmlinuz "${tftp_path}/"
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cp /mnt/live/initrd.img "${tftp_path}/"
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umount /mnt
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}
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install_netboot() {
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# if you want to refresh install, remove or move dir
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if [ ! -d "${tftp_path}" ] || [ "${FORCE:-}" ]; then
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mkdir -p "${tftp_path}"
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cd "${tftp_path}"
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extract_live_parts_for_tftp
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cat > "${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.img
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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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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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if [ -f ./.env ]; then
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. ./.env
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else
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echo 'PXE: WARNING: .env does not exist yet, cannot read config from there. You can take inspiration with file .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-images}"
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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_netboot
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install_tftp
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install_nfs
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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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