feat: add reversible installer with interactive mail from/to prompts
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#!/bin/bash
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# =============================================================================
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# ns8-backup-monitor - Installer / Uninstaller
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# =============================================================================
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# Usage:
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# install.sh - install
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# install.sh --uninstall - remove everything installed by this script
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#
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# Requires: root, python3, git
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# Tested on: AlmaLinux 8/9, Rocky Linux 8/9 (NS8 supported distros)
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# =============================================================================
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set -euo pipefail
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# --- constants ---------------------------------------------------------------
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SERVICE_NAME="ns8-backup-monitor"
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INSTALL_DIR="/opt/ns8-backup-monitor"
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CONFIG_DIR="/etc/ns8-backup-monitor"
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CONFIG_FILE="${CONFIG_DIR}/config.yml"
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SERVICE_FILE="/etc/systemd/system/${SERVICE_NAME}.service"
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REPO_URL="https://repo.lelekaos.com/admin/ns8-backup-monitor.git"
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PYTHON=$(command -v python3 || true)
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# --- colours -----------------------------------------------------------------
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RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[1;33m'
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BLUE='\033[0;34m'; BOLD='\033[1m'; RESET='\033[0m'
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info() { echo -e "${BLUE}[INFO]${RESET} $*"; }
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ok() { echo -e "${GREEN}[OK]${RESET} $*"; }
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warn() { echo -e "${YELLOW}[WARN]${RESET} $*"; }
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error() { echo -e "${RED}[ERROR]${RESET} $*" >&2; exit 1; }
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# =============================================================================
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# UNINSTALL
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# =============================================================================
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do_uninstall() {
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echo -e "${BOLD}=== ns8-backup-monitor UNINSTALL ===${RESET}"
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warn "This will stop and remove the service, code and config."
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read -rp "Continue? [y/N] " confirm
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[[ "$confirm" =~ ^[Yy]$ ]] || { info "Aborted."; exit 0; }
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# Stop & disable service
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if systemctl is-active --quiet "$SERVICE_NAME" 2>/dev/null; then
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info "Stopping service..."
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systemctl stop "$SERVICE_NAME"
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fi
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if systemctl is-enabled --quiet "$SERVICE_NAME" 2>/dev/null; then
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info "Disabling service..."
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systemctl disable "$SERVICE_NAME"
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fi
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# Remove service file
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if [[ -f "$SERVICE_FILE" ]]; then
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info "Removing systemd unit..."
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rm -f "$SERVICE_FILE"
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systemctl daemon-reload
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ok "Systemd unit removed."
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fi
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# Remove install dir
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if [[ -d "$INSTALL_DIR" ]]; then
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info "Removing ${INSTALL_DIR}..."
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rm -rf "$INSTALL_DIR"
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ok "Install directory removed."
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fi
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# Ask about config
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if [[ -d "$CONFIG_DIR" ]]; then
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read -rp "Remove config directory ${CONFIG_DIR}? [y/N] " rmcfg
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if [[ "$rmcfg" =~ ^[Yy]$ ]]; then
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rm -rf "$CONFIG_DIR"
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ok "Config directory removed."
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else
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warn "Config kept at ${CONFIG_DIR}."
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fi
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fi
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echo -e "${GREEN}${BOLD}Uninstall complete.${RESET}"
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}
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# =============================================================================
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# INSTALL
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# =============================================================================
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do_install() {
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echo -e "${BOLD}=== ns8-backup-monitor INSTALLER ===${RESET}\n"
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# --- pre-flight checks ---------------------------------------------------
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[[ $EUID -eq 0 ]] || error "Run as root (or with sudo)."
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[[ -n "$PYTHON" ]] || error "python3 not found."
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command -v git &>/dev/null || error "git not found."
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command -v ns8-sendmail &>/dev/null || \
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warn "ns8-sendmail not found in PATH - make sure this runs on an NS8 node."
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# --- interactive mail config ---------------------------------------------
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echo -e "${BOLD}Mail configuration${RESET}"
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echo -e "Email delivery uses ${BLUE}ns8-sendmail${RESET} (NS8 configured relay)."
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echo
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# mail from
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local default_from="ns8-backup-monitor@$(hostname -f 2>/dev/null || echo localhost)"
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read -rp "Sender address (From) [${default_from}]: " MAIL_FROM
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MAIL_FROM="${MAIL_FROM:-$default_from}"
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# mail to - loop until at least one address is entered
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local MAIL_TO_LIST=()
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echo "Recipient addresses (To) - enter one per line, empty line to finish:"
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while true; do
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read -rp " Recipient: " addr
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[[ -z "$addr" ]] && break
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MAIL_TO_LIST+=("$addr")
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done
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[[ ${#MAIL_TO_LIST[@]} -gt 0 ]] || error "At least one recipient is required."
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# subject prefix
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read -rp "Subject prefix [[NS8 Backup]]: " SUBJECT_PREFIX
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SUBJECT_PREFIX="${SUBJECT_PREFIX:-[NS8 Backup]}"
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echo
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info "From: $MAIL_FROM"
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info "To: ${MAIL_TO_LIST[*]}"
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info "Prefix: $SUBJECT_PREFIX"
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echo
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read -rp "Confirm and proceed with install? [Y/n] " go
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[[ "$go" =~ ^[Nn]$ ]] && { info "Aborted."; exit 0; }
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echo
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# --- clone / update source -----------------------------------------------
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if [[ -d "${INSTALL_DIR}/.git" ]]; then
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info "Updating existing clone in ${INSTALL_DIR}..."
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git -C "$INSTALL_DIR" pull --ff-only
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else
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info "Cloning into ${INSTALL_DIR}..."
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git clone "$REPO_URL" "$INSTALL_DIR"
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fi
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ok "Source ready."
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# --- config directory ----------------------------------------------------
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mkdir -p "$CONFIG_DIR"
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chmod 750 "$CONFIG_DIR"
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if [[ -f "$CONFIG_FILE" ]]; then
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warn "Config file ${CONFIG_FILE} already exists - keeping it."
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warn "Edit it manually if you need to change mail settings."
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else
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info "Writing ${CONFIG_FILE}..."
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# Build YAML 'to' list
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local to_yaml=""
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for addr in "${MAIL_TO_LIST[@]}"; do
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to_yaml+=" - \"${addr}\"\n"
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done
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cat > "$CONFIG_FILE" <<EOF
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# ns8-backup-monitor configuration
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# Generated by install.sh on $(date -u '+%Y-%m-%d %H:%M UTC')
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# Email delivery is handled by ns8-sendmail (NS8 configured relay).
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mail:
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from: "${MAIL_FROM}"
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to:
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$(printf '%b' "$to_yaml")
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subject_prefix: "${SUBJECT_PREFIX}"
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receiver:
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host: "127.0.0.1"
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port: 9099
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correlator:
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wait_seconds: 30
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recent_window: 3600
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redis:
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socket: "/var/lib/nethserver/cluster/state/redis.sock"
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repo_check:
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timeout: 60
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restic_flags: ""
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logging:
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level: INFO
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file: "/var/log/ns8-backup-monitor.log"
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EOF
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chmod 640 "$CONFIG_FILE"
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ok "Config written."
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fi
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# --- systemd unit --------------------------------------------------------
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info "Installing systemd unit..."
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cp "${INSTALL_DIR}/deploy/ns8-backup-monitor.service" "$SERVICE_FILE"
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systemctl daemon-reload
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systemctl enable --now "$SERVICE_NAME"
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ok "Service enabled and started."
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# --- done ----------------------------------------------------------------
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echo
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echo -e "${GREEN}${BOLD}Installation complete.${RESET}"
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echo -e " Config: ${CONFIG_FILE}"
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echo -e " Logs: journalctl -u ${SERVICE_NAME} -f"
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echo -e " Status: systemctl status ${SERVICE_NAME}"
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echo
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echo -e "To uninstall: ${BOLD}bash ${INSTALL_DIR}/deploy/install.sh --uninstall${RESET}"
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}
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# =============================================================================
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# ENTRYPOINT
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# =============================================================================
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case "${1:-}" in
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--uninstall|-u|uninstall)
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do_uninstall
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;;
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--help|-h)
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echo "Usage: $0 [--uninstall]"
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exit 0
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;;
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"")
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do_install
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;;
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*)
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error "Unknown argument: $1. Use --uninstall to remove."
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;;
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esac
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