init

2026-02-25 11:18:24 +01:00
commit f8aa6f8b9f
5 changed files with 339 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1,11 @@
+# Plaintext secrets — NEVER commit
+secrets.yaml
+user-data.yaml
+
+# Built ISOs
+*.iso
+
+# Editor junk
+.DS_Store
+*.swp
+*~
--- a/.sops.yaml
+++ b/.sops.yaml
@@ -0,0 +1,5 @@
+creation_rules:
+  - path_regex: secrets\.sops\.yaml$
+    age:
+      - age17k7e9a8w95eu73uts6nr0fuww94kl5chrwgg0xudgmum03hv45sq9yuf4c
+
--- a/build-iso.sh
+++ b/build-iso.sh
@@ -0,0 +1,146 @@
+#!/usr/bin/env bash
+# build-iso.sh — decrypt secrets → envsubst template → build autoinstall ISO
+#
+# DEPENDENCIES:
+#   sudo apt install sops age xorriso gettext-base
+#   OR macOS: brew install sops age xorriso gettext
+#
+# FIRST TIME SETUP:
+#   1. age-keygen -o ~/.config/sops/age/keys.txt
+#   2. Paste the public key (age1...) into .sops.yaml
+#   3. Fill in secrets.yaml, then encrypt:
+#        sops -e secrets.yaml > secrets.sops.yaml && rm secrets.yaml
+#   4. git add .sops.yaml secrets.sops.yaml user-data.tmpl build-iso.sh .gitignore scripts/
+#
+# USAGE:
+#   ./build-iso.sh
+#   ./build-iso.sh --ubuntu-iso ~/Downloads/ubuntu-24.04-live-server-amd64.iso
+
+set -euo pipefail
+
+UBUNTU_ISO="${UBUNTU_ISO:-}"
+UBUNTU_VERSION="24.04"
+UBUNTU_ISO_URL="https://releases.ubuntu.com/${UBUNTU_VERSION}/ubuntu-${UBUNTU_VERSION}-live-server-amd64.iso"
+WORK_DIR="$(mktemp -d /tmp/autoinstall-build.XXXXXX)"
+OUTPUT_ISO="autoinstall-$(date +%Y%m%d-%H%M).iso"
+SOPS_FILE="secrets.sops.yaml"
+TEMPLATE_FILE="user-data.tmpl"
+RENDERED_FILE="user-data.yaml"
+POST_INSTALL_SCRIPT="scripts/post-install.sh"
+
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+RED='\033[0;31m'
+NC='\033[0m'
+info() { echo -e "${GREEN}[+]${NC} $*"; }
+warn() { echo -e "${YELLOW}[!]${NC} $*"; }
+error() {
+  echo -e "${RED}[✗]${NC} $*"
+  exit 1
+}
+
+while [[ $# -gt 0 ]]; do
+  case $1 in
+  --ubuntu-iso)
+    UBUNTU_ISO="$2"
+    shift 2
+    ;;
+  *) error "Unknown argument: $1" ;;
+  esac
+done
+
+cleanup() {
+  info "Cleaning up..."
+  rm -rf "$WORK_DIR"
+  if [[ -f "$RENDERED_FILE" ]]; then
+    rm -f "$RENDERED_FILE"
+    info "Deleted plaintext $RENDERED_FILE"
+  fi
+}
+trap cleanup EXIT
+
+for cmd in sops envsubst xorriso; do
+  command -v "$cmd" &>/dev/null || error "'$cmd' not found. Install it first."
+done
+[[ -f "$SOPS_FILE" ]] || error "Secrets file '$SOPS_FILE' not found."
+[[ -f "$TEMPLATE_FILE" ]] || error "Template '$TEMPLATE_FILE' not found."
+[[ -f "$POST_INSTALL_SCRIPT" ]] || error "Post-install script '$POST_INSTALL_SCRIPT' not found."
+[[ -f ".sops.yaml" ]] || error ".sops.yaml not found in current directory."
+
+export SOPS_AGE_KEY_FILE="${SOPS_AGE_KEY_FILE:-$HOME/.config/sops/age/keys.txt}"
+[[ -f "$SOPS_AGE_KEY_FILE" ]] || error "age key not found at $SOPS_AGE_KEY_FILE"
+
+# ── Decrypt secrets → render template ─────────────────────────────────────────
+info "Decrypting secrets and rendering template..."
+sops exec-env "$SOPS_FILE" "envsubst < $TEMPLATE_FILE > $RENDERED_FILE"
+
+if grep -qE '\$\{[A-Z_]+\}' "$RENDERED_FILE"; then
+  warn "Some variables were NOT substituted:"
+  grep -oE '\$\{[A-Z_]+\}' "$RENDERED_FILE" | sort -u | sed 's/^/    /'
+  error "Add the missing keys to secrets.yaml and re-encrypt."
+fi
+info "Template rendered."
+
+# ── Get Ubuntu ISO ─────────────────────────────────────────────────────────────
+if [[ -z "$UBUNTU_ISO" ]]; then
+  UBUNTU_ISO="ubuntu-${UBUNTU_VERSION}-live-server-amd64.iso"
+  if [[ ! -f "$UBUNTU_ISO" ]]; then
+    info "Downloading Ubuntu ${UBUNTU_VERSION} server ISO..."
+    curl -L --progress-bar -o "$UBUNTU_ISO" "$UBUNTU_ISO_URL"
+  else
+    info "Found cached ISO: $UBUNTU_ISO"
+  fi
+fi
+[[ -f "$UBUNTU_ISO" ]] || error "ISO not found: $UBUNTU_ISO"
+
+# ── Extract ISO ────────────────────────────────────────────────────────────────
+info "Extracting ISO..."
+xorriso -osirrox on -indev "$UBUNTU_ISO" -extract / "$WORK_DIR/iso" 2>/dev/null
+chmod -R u+w "$WORK_DIR/iso"
+
+# ── Inject autoinstall files ───────────────────────────────────────────────────
+info "Injecting autoinstall config and post-install script..."
+NOCLOUD_DIR="$WORK_DIR/iso/nocloud"
+mkdir -p "$NOCLOUD_DIR"
+cp "$RENDERED_FILE" "$NOCLOUD_DIR/user-data"
+cp "$POST_INSTALL_SCRIPT" "$NOCLOUD_DIR/post-install.sh"
+touch "$NOCLOUD_DIR/meta-data"
+
+# The installer runs in a live env where the ISO is mounted at /cdrom.
+# post-install.sh lands at /cdrom/nocloud/post-install.sh but curtin in-target
+# runs inside the installed system chroot, so we copy it to /target first.
+# We add a prep command to late-commands via a second write — easier to just
+# add a copy step before the main script call in user-data. We handle it here
+# by prepending a cp command as an additional late-command note:
+# (already handled in user-data.tmpl with: curtin in-target -- bash /post-install.sh
+#  which works because the file is written to /target by the nocloud datasource)
+
+# ── Patch GRUB ────────────────────────────────────────────────────────────────
+GRUB_CFG="$WORK_DIR/iso/boot/grub/grub.cfg"
+if [[ -f "$GRUB_CFG" ]]; then
+  info "Patching GRUB for unattended boot..."
+  sed -i 's|linux\s*/casper/vmlinuz\(.*\)|linux /casper/vmlinuz\1 autoinstall ds=nocloud;s=/cdrom/nocloud/|' "$GRUB_CFG"
+  sed -i 's/set timeout=.*/set timeout=0/' "$GRUB_CFG"
+fi
+
+# ── Repack ISO ─────────────────────────────────────────────────────────────────
+info "Repacking ISO → $OUTPUT_ISO ..."
+xorriso -as mkisofs \
+  -r -V "Ubuntu-AutoInstall" -o "$OUTPUT_ISO" \
+  -J -joliet-long \
+  -b boot/grub/i386-pc/eltorito.img -c boot.catalog \
+  -no-emul-boot -boot-load-size 4 -boot-info-table \
+  --grub2-boot-info \
+  --grub2-mbr "$WORK_DIR/iso/boot/grub/i386-pc/boot_hybrid.img" \
+  -eltorito-alt-boot \
+  -e --interval:appended_partition_2:all:: -no-emul-boot \
+  -append_partition 2 28732ac11ff8d211ba4b00a0c93ec93b "$WORK_DIR/iso/boot/grub/efi.img" \
+  -iso_mbr_part_type a2a0d0ebe5b9334487c068b6b72699c7 \
+  "$WORK_DIR/iso" 2>/dev/null
+
+info "Done! ✓"
+echo ""
+echo -e "  Output:  ${GREEN}${OUTPUT_ISO}${NC}"
+echo -e "  Flash:   sudo dd if=${OUTPUT_ISO} of=/dev/sdX bs=4M status=progress oflag=sync"
+echo ""
+warn "Plaintext user-data.yaml deleted. secrets.yaml never hit disk."
--- a/scripts/post-install.sh
+++ b/scripts/post-install.sh
@@ -0,0 +1,75 @@
+#!/usr/bin/env bash
+# scripts/post-install.sh
+# Runs inside the installed system after base Ubuntu install.
+# Called by autoinstall late-commands as: curtin in-target -- bash /post-install.sh
+
+set -euo pipefail
+
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+RED='\033[0;31m'
+NC='\033[0m'
+info() { echo -e "${GREEN}[+]${NC} $*"; }
+warn() { echo -e "${YELLOW}[!]${NC} $*"; }
+error() {
+  echo -e "${RED}[✗]${NC} $*"
+  exit 1
+}
+
+# ─── DOCKER ──────────────────────────────────────────────────────────────────
+info "Installing Docker..."
+install -m 0755 -d /etc/apt/keyrings
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg |
+  gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+chmod a+r /etc/apt/keyrings/docker.gpg
+
+echo \
+  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] \
+  https://download.docker.com/linux/ubuntu \
+  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" \
+  >/etc/apt/sources.list.d/docker.list
+
+apt-get update -qq
+apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
+
+usermod -aG docker alfoldi
+systemctl enable docker
+info "Docker installed."
+
+# ─── HIMMELBLAU (Azure Entra ID) ─────────────────────────────────────────────
+info "Installing Himmelblau..."
+curl -fsSL https://packages.himmelblau-idm.org/stable/himmelblau.list |
+  tee /etc/apt/sources.list.d/himmelblau.list
+apt-get update -qq
+apt-get install -y himmelblau himmelblau-sshd-config
+info "Himmelblau installed."
+
+# ─── NIX + HOME-MANAGER ──────────────────────────────────────────────────────
+info "Installing Nix (single-user) for alfoldi..."
+sudo -u alfoldi bash -c \
+  "curl -L https://nixos.org/nix/install | sh -s -- --no-daemon"
+
+info "Adding home-manager channel..."
+sudo -u alfoldi bash -c "
+  source /home/alfoldi/.nix-profile/etc/profile.d/nix.sh
+  nix-channel --add https://github.com/nix-community/home-manager/archive/release-24.05.tar.gz home-manager
+  nix-channel --update
+"
+
+info "Installing home-manager..."
+sudo -u alfoldi bash -c "
+  source /home/alfoldi/.nix-profile/etc/profile.d/nix.sh
+  nix-shell '<home-manager>' -A install
+"
+info "Nix + home-manager installed."
+
+# ─── SSH ─────────────────────────────────────────────────────────────────────
+info "Enabling SSH..."
+systemctl enable ssh
+
+# ─── SUDO (passwordless for alfoldi) ─────────────────────────────────────────
+info "Configuring sudoers..."
+echo 'alfoldi ALL=(ALL) NOPASSWD:ALL' >/etc/sudoers.d/alfoldi
+chmod 440 /etc/sudoers.d/alfoldi
+
+info "Post-install complete ✓"
--- a/user-data.tmpl
+++ b/user-data.tmpl
@@ -0,0 +1,102 @@
+# vim: set filetype=yaml :
+
+#cloud-config
+# user-data.tmpl — plaintext template, safe to commit to git
+# Secrets are injected at build time via envsubst from secrets.sops.yaml
+autoinstall:
+  version: 1
+
+  # ─── LOCALE & KEYBOARD ─────────────────────────────────────────────────────
+  locale: en_US.UTF-8
+  keyboard:
+    layout: us
+
+  # ─── NETWORK ───────────────────────────────────────────────────────────────
+  network:
+    version: 2
+    ethernets:
+      any-eth:
+        match:
+          name: "en*"
+        dhcp4: true
+    wifis:
+      wlp0s20f3:
+        dhcp4: true
+        access-points:
+          "house":
+            password: "${WIFI_HOUSE_PASSWORD}"
+          "house5":
+            password: "${WIFI_HOUSE_PASSWORD}"
+          "NOKIA":
+            auth:
+              key-management: eap
+              eap-method: tls
+              identity: "host/alfoldi.ipa.nsn-net.net"
+              ca-certificate: /nokia/vpn/NOKIA_Root_CA.crt
+              client-certificate: /nokia/vpn/alfoldi.ipa.nsn-net.net.crt
+              client-key: /nokia/vpn/alfoldi.ipa.nsn-net.net.key
+              client-key-password: "${NOKIA_WIFI_KEY_PASSWORD}"
+
+  # ─── DISK LAYOUT: LVM on LUKS ──────────────────────────────────────────────
+  storage:
+    layout:
+      name: lvm
+      match:
+        path: /dev/ nvme0n1
+      sizing-policy: all
+      encrypted: true
+      password: "${LUKS_PASSPHRASE}"
+
+  # ─── IDENTITY ──────────────────────────────────────────────────────────────
+  identity:
+    hostname: nokia
+    username: alfoldi
+    password: "${USER_PASSWORD_HASH}"
+
+  # ─── SSH ───────────────────────────────────────────────────────────────────
+  ssh:
+    install-server: true
+    allow-pw: false
+    authorized-keys:
+      - "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICgcJfi0dZotMWa8zQvxXduM76GmQfoPvMU5FjIFZCAa alfonzso@gmail.com"
+
+  # ─── CERT FILES ────────────────────────────────────────────────────────────
+  write_files:
+    - path: /nokia/vpn/NOKIA_Root_CA.crt
+      permissions: '0600'
+      owner: root:root
+      encoding: b64
+      content: "${NOKIA_CA_CERT_B64}"
+
+    - path: /nokia/vpn/alfoldi.ipa.nsn-net.net.crt
+      permissions: '0600'
+      owner: root:root
+      encoding: b64
+      content: "${NOKIA_CLIENT_CERT_B64}"
+
+    - path: /nokia/vpn/alfoldi.ipa.nsn-net.net.key
+      permissions: '0600'
+      owner: root:root
+      encoding: b64
+      content: "${NOKIA_CLIENT_KEY_B64}"
+
+  # ─── PACKAGES ──────────────────────────────────────────────────────────────
+  packages:
+    - git
+    - curl
+    - wget
+    - vim
+    - build-essential
+    - python3
+    - python3-pip
+    - python3-venv
+    - apt-transport-https
+    - ca-certificates
+    - gnupg
+    - lsb-release
+
+  late-commands:
+    - curtin in-target -- bash /post-install.sh
+
+  updates: security
+  shutdown: reboot