233 lines
7.7 KiB
Bash
233 lines
7.7 KiB
Bash
#!/usr/bin/env bash
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#
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# setup-auto-updates.sh
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#
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# Universal unattended-upgrades setup for Debian & Ubuntu.
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# - Uses Origins-Pattern (modern) with ${distro_id}/${distro_codename} macros
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# - Safe for Debian Bookworm/Trixie and Ubuntu Noble+ (classic & deb822 sources)
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# - Clears legacy Allowed-Origins to avoid fragile legacy parser
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# - Enables APT Periodic + systemd timers (when present)
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# - Dry-run validation that won’t abort the run if APT is busy
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# - Interactive choice: ALL updates or SECURITY-only updates
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#
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# Re-run safe: overwrites 50unattended-upgrades and 20auto-upgrades.
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set -Eeuo pipefail
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trap 'echo "[ERROR] Line $LINENO failed" >&2' ERR
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REBOOT_TIME="${REBOOT_TIME:-04:00}"
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UPDATE_SCOPE="${UPDATE_SCOPE:-}" # optional env override: "all" or "security"
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OS=""
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require_root() {
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if [[ $EUID -ne 0 ]]; then
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echo "[ERROR] Run as root (sudo)." >&2
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exit 1
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fi
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}
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detect_os() {
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[[ -f /etc/os-release ]] || { echo "[ERROR] /etc/os-release not found." >&2; exit 1; }
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# shellcheck disable=SC1091
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. /etc/os-release
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local id="${ID,,}"
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case "$id" in
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debian|ubuntu) OS="$id" ;;
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*) [[ "${ID_LIKE:-}" =~ debian ]] && OS="debian" || { echo "[ERROR] Unsupported OS: $ID."; exit 1; } ;;
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esac
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echo "[INFO] Detected OS: ${PRETTY_NAME:-$ID}"
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}
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wait_for_apt() {
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echo "[INFO] Checking for apt/dpkg locks…"
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local locks=(/var/lib/dpkg/lock-frontend /var/lib/dpkg/lock /var/lib/apt/lists/lock)
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for i in {1..90}; do
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if ! fuser "${locks[@]}" >/dev/null 2>&1; then
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echo "[INFO] No locks detected."
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return 0
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fi
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(( i % 10 == 0 )) && echo "[INFO] apt/dpkg busy…waiting $(($i*2))s"
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sleep 2
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done
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echo "[WARN] apt/dpkg still busy after ~180s; continuing anyway."
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return 1
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}
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prompt_update_scope() {
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# Honor env override first (supports: all, full, security)
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if [[ -n "${UPDATE_SCOPE:-}" ]]; then
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case "${UPDATE_SCOPE,,}" in
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all|full) UPDATE_SCOPE="all"; echo "[INFO] Update scope (from env): ALL"; return 0 ;;
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security) UPDATE_SCOPE="security"; echo "[INFO] Update scope (from env): SECURITY-only"; return 0 ;;
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*) echo "[ERROR] UPDATE_SCOPE must be 'all' (or 'full') or 'security'."; exit 1 ;;
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esac
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fi
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# Non-interactive (no TTY): default to Full
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if [[ ! -t 0 ]]; then
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UPDATE_SCOPE="all"
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echo "[INFO] Non-interactive session: defaulting to ALL updates."
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return 0
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fi
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echo
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echo "Configure automatic updates. Choose one:"
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echo " 1) Full updates — install regular and security updates from your distro"
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echo " (recommended for most systems; includes -updates and -security pockets)."
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echo " 2) Security-only — install only security updates from your distro"
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echo " (fewer changes; functional fixes may be delayed)."
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echo
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while true; do
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read -r -p "Select [1/2] (default: 1): " choice
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case "$choice" in
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""|1) UPDATE_SCOPE="all"; echo "[INFO] Chosen update scope: ALL"; break ;;
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2) UPDATE_SCOPE="security"; echo "[INFO] Chosen update scope: SECURITY-only"; break ;;
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*) echo "Please enter 1 or 2."; ;;
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esac
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done
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}
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apt_refresh_and_install() {
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wait_for_apt || true
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echo "[INFO] Updating APT cache…"
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apt-get update -qq || true
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wait_for_apt || true
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echo "[INFO] Installing unattended-upgrades…"
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DEBIAN_FRONTEND=noninteractive apt-get install -y unattended-upgrades >/dev/null || true
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# Ensure periodic is enabled via debconf
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echo 'unattended-upgrades unattended-upgrades/enable_auto_updates boolean true' | debconf-set-selections || true
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DEBIAN_FRONTEND=noninteractive dpkg-reconfigure -f noninteractive unattended-upgrades >/dev/null || true
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}
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write_50unattended() {
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# Build the Origins-Pattern block dynamically without expanding unattended macros.
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local tmp_file="/etc/apt/apt.conf.d/50unattended-upgrades"
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{
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# Header and open block (single-quoted heredoc preserves ${distro_*})
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cat <<'EOF'
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// Auto-installed by setup-auto-updates.sh
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// Use Origins-Pattern only; clear legacy to avoid fragile parsing.
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#clear Unattended-Upgrade::Allowed-Origins;
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#clear Unattended-Upgrade::Origins-Pattern;
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Unattended-Upgrade::Origins-Pattern {
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EOF
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# ALL vs SECURITY blocks
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if [[ "$UPDATE_SCOPE" == "all" ]]; then
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printf ' "origin=${distro_id},archive=${distro_codename}";\n'
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printf ' "origin=${distro_id},archive=${distro_codename}-updates";\n'
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printf ' "origin=${distro_id},archive=${distro_codename}-security";\n'
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printf ' "origin=${distro_id},codename=${distro_codename}";\n'
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printf ' "origin=${distro_id},codename=${distro_codename}-updates";\n'
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printf ' "origin=${distro_id},codename=${distro_codename}-security";\n'
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else
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# Security-only
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printf ' "origin=${distro_id},archive=${distro_codename}-security";\n'
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printf ' "origin=${distro_id},codename=${distro_codename}-security";\n'
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fi
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# Ubuntu ESM pockets (only meaningful on Ubuntu; harmless otherwise—will be removed later on non-Ubuntu)
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printf ' "origin=UbuntuESM,archive=${distro_codename}-infra-security";\n'
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printf ' "origin=UbuntuESMApps,archive=${distro_codename}-apps-security";\n'
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# Close block + rest of configuration
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cat <<'EOF'
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};
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Unattended-Upgrade::Automatic-Reboot "true";
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Unattended-Upgrade::Automatic-Reboot-Time "REBOOT_TIME_PLACEHOLDER";
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Unattended-Upgrade::Automatic-Reboot-WithUsers "false";
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Unattended-Upgrade::Remove-Unused-Dependencies "true";
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Unattended-Upgrade::Remove-New-Unused-Dependencies "true";
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Unattended-Upgrade::SyslogEnable "true";
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Unattended-Upgrade::Verbose "0";
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EOF
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} > "$tmp_file"
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# Inject the desired reboot time without touching ${distro_*} macros
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sed -i "s/REBOOT_TIME_PLACEHOLDER/${REBOOT_TIME}/" "$tmp_file"
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# For neatness: drop ESM patterns on non-Ubuntu systems
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if [[ "$OS" != "ubuntu" ]]; then
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sed -i '/UbuntuESM/d' "$tmp_file"
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fi
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}
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write_20auto() {
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cat > /etc/apt/apt.conf.d/20auto-upgrades <<'EOF'
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APT::Periodic::Update-Package-Lists "1";
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APT::Periodic::Download-Upgradeable-Packages "1";
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APT::Periodic::Unattended-Upgrade "1";
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APT::Periodic::AutocleanInterval "7";
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EOF
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}
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enable_timers_if_systemd() {
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if command -v systemctl >/dev/null 2>&1; then
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systemctl enable --now apt-daily.timer apt-daily-upgrade.timer 2>/dev/null || true
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fi
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}
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validate_with_dryrun() {
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wait_for_apt || true
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echo "[INFO] Validating unattended-upgrades with a dry run…"
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local log="/tmp/unattended-upgrades-dryrun.$$"
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if ! timeout 180 unattended-upgrades --dry-run --debug >"$log" 2>&1; then
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echo "[WARN] Dry run timed out or failed; see $log"
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return 1
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fi
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grep -E "Allowed origins are" "$log" | head -n1 || true
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if grep -qiE "Unable to parse|ValueError|AttributeError|ImportError" "$log"; then
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echo "[ERROR] Parsing error detected; see $log"
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return 1
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fi
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}
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show_status() {
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echo
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echo "[INFO] Update scope: $UPDATE_SCOPE"
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echo "[INFO] Config files:"
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ls -la /etc/apt/apt.conf.d/20auto-upgrades /etc/apt/apt.conf.d/50unattended-upgrades 2>/dev/null || true
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echo
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if command -v systemctl >/dev/null 2>&1; then
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echo "[INFO] Timers:"
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systemctl list-timers --all | grep -E 'apt-(daily|daily-upgrade)\.timer' || true
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else
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echo "[INFO] systemd not present; relying on APT::Periodic via cron."
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fi
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}
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main() {
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echo "[INFO] Unattended-upgrades configurator (Debian/Ubuntu)"
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require_root
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detect_os
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prompt_update_scope
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apt_refresh_and_install
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write_50unattended
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write_20auto
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enable_timers_if_systemd
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set +e
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validate_with_dryrun
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vr=$?
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set -e
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if (( vr != 0 )); then
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echo "[WARN] Validation failed or timed out. Config is written; timers/periodic will still run."
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fi
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show_status
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echo
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echo "[OK] Unattended updates configured (%s updates); reboot at %s if needed." "$UPDATE_SCOPE" "$REBOOT_TIME"
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}
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main "$@"
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