From a60a6e65397ef38083292b276922282419ca32a6 Mon Sep 17 00:00:00 2001
From: pedro <git2021@cas.cat>
Date: Tue, 24 Sep 2024 10:51:14 -0300
Subject: [PATCH] PXE WIP

---
 .gitignore         |  1 +
 pxe/.env.example   |  4 +++
 pxe/README.md      |  3 ++
 pxe/install-pxe.sh | 81 ++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 89 insertions(+)
 create mode 100644 pxe/.env.example
 create mode 100644 pxe/README.md
 create mode 100755 pxe/install-pxe.sh

diff --git a/.gitignore b/.gitignore
index b9aa2fd..b3b940f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ iso
 settings.ini
 # ignore all possible snapshots in this dir
 *.json
+pxe/.env
diff --git a/pxe/.env.example b/pxe/.env.example
new file mode 100644
index 0000000..7f9b806
--- /dev/null
+++ b/pxe/.env.example
@@ -0,0 +1,4 @@
+server_ip=192.168.1.2
+nfs_allowed_lan=192.168.1.0/24
+tftp_path='/srv/pxe-tftp'
+nfs_path='/srv/pxe-images'
diff --git a/pxe/README.md b/pxe/README.md
new file mode 100644
index 0000000..f30acc4
--- /dev/null
+++ b/pxe/README.md
@@ -0,0 +1,3 @@
+Run `install-pxe.sh`
+
+inspired on https://farga.exo.cat/exo/wiki/src/branch/master/howto/apu/apu-installer.md
diff --git a/pxe/install-pxe.sh b/pxe/install-pxe.sh
new file mode 100755
index 0000000..6839de8
--- /dev/null
+++ b/pxe/install-pxe.sh
@@ -0,0 +1,81 @@
+#!/bin/sh
+
+# Copyright (c) 2024 Pedro <copyright@cas.cat>
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+set -e
+set -u
+# DEBUG
+set -x
+
+install_dependencies() {
+        apt update
+        apt install -y wget dnsmasq nfs-kernel-server
+}
+
+backup_file() {
+        target="${1}"
+        ts="$(date +'%Y-%m-%d_%H-%M-%S')"
+        if [ -f "${target}" ]; then
+                cp -a "${target}" "${target}_bak_${ts}"
+        fi
+}
+
+install_nfs() {
+        backup_file /etc/exports
+        cat /etc/exports <<END
+${nfs_path} ${nfs_allowed_lan}(rw,sync,no_subtree_check,no_root_squash)
+END
+}
+
+install_tftp() {
+        # TODO creo que se puede hacer un fichero de config específico
+        #   podría ser algo como /etc/dnsmasq.conf.d/my-pxe-server ?
+        #backup_file /etc/dnsmasq.conf
+        cat /etc/exports <<END
+${nfs_path} ${nfs_allowed_lan}(rw,sync,no_subtree_check,no_root_squash)
+END
+}
+
+install_netboot() {
+        # if you want to refresh install, remove or move dir
+        if [ ! -d "${tftp_path}" ]; then
+                mkdir -p "${tftp_path}"
+                cd "${tftp_path}"
+                wget http://ftp.debian.org/debian/dists/${VERSION_CODENAME}/main/installer-amd64/current/images/netboot/netboot.tar.gz
+                tar xvf netboot.tar.gz
+                cat "${tftp_path}/pxelinux.cfg/default" <<END
+default wb
+
+label wb
+        KERNEL vmlinuz
+        INITRD initd.img
+        APPEND ip=dhcp netboot=nfs nfsroot=${server_ip}:${nfs_path}/ boot=live text forcepae
+END
+        fi
+}
+
+init_config() {
+        if [ -f ./.env ]; then
+                . ./env
+        else
+                echo 'WARNING: ./env does not exist, cannot read config from there'
+        fi
+        VERSION_CODENAME="${VERSION_CODENAME:-bookworm}"
+        tftp_path="${tftp_path:-/srv/pxe-tftp}"
+        server_ip="${server_ip}"
+        nfs_path="${nfs_path:-/srv/pxe-images}"
+}
+
+main() {
+        init_config
+        install_dependencies
+        install_netboot
+        install_tftp
+        install_nfs
+}
+
+main "${@}"
+
+# written in emacs
+# -*- mode: shell-script; -*-