Refactor: Centralize configuration and improve security

- Add centralized configuration system with backup.env
- Move configuration files to proper structure (config/ directory)
- Remove hardcoded paths and make system portable
- Fix security issue: remove password exposure in gen-conf.sh
- Add comprehensive documentation (README.md, CLAUDE.md)
- Create configuration template (backup.env.sample)
- Add .gitignore to protect sensitive files
- Update all scripts to use environment variables
- Implement systemd template variable substitution

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,15 @@
+# Configuration files with sensitive data
+backup.env
+config/restic.conf
+
+# Logs
+*.log
+
+# Temporary files
+*.tmp
+*.bak
+*~
+
+# Cache directories
+cache/
+.cache/

CLAUDE.md

@@ -0,0 +1,118 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Critical Convention
+
+**ALL scripts must be executed in an environment that has sourced the configuration:**
+
+```bash
+# Always start by sourcing configuration
+source backup.env
+
+# Then execute any script
+./backup/manage list
+./backup/gen-conf.sh
+sudo ./backup/install-service paperless
+```
+
+This is the core architectural pattern of this codebase. Scripts do NOT auto-source configuration files.
+
+## Common Commands
+
+### Initial Setup
+```bash
+cp backup.env.sample backup.env  # Copy configuration template
+# Edit backup.env to match environment
+source backup.env
+./backup/gen-conf.sh          # Generate secure Restic configuration
+./backup/init-restic.sh       # Initialize Restic repository
+```
+
+### Service Management
+```bash
+source backup.env
+./backup/manage list                    # List all backup timers
+./backup/manage status <service>        # Service backup status
+./backup/manage run <service>           # Manual backup execution
+./backup/manage logs <service>          # View backup logs
+sudo ./backup/install-service <service> # Install systemd timer
+```
+
+### Backup Operations
+```bash
+source backup.env
+./backup/list-snapshots [service]                # List available snapshots
+./backup/restore <service> --test                # Test restoration
+./backup/restore <service> --production          # Production restoration
+```
+
+### Configuration Testing
+```bash
+source backup.env
+show_config                   # Display current configuration
+validate_paths               # Check directory existence
+```
+
+## Architecture
+
+### Configuration System
+- **`backup.env`**: Master configuration file at project root containing all environment variables
+- **`config/restic.conf`**: Generated Restic-specific configuration (created by `gen-conf.sh`)
+- **Variable substitution**: systemd templates use `${VAR}` placeholders replaced during installation
+
+### Core Components
+- **`backup/manage`**: Primary interface for all backup operations and service management
+- **`backup/install-service`**: Systemd timer installer that performs variable substitution in templates
+- **`backup/restore`**: Advanced restoration tool with test/production modes and safety checks
+- **Templates**: `service-backup@.service` and `service-backup@.timer` are systemd unit templates
+
+### Variable Override Pattern
+Configuration uses environment variable defaults with override capability:
+```bash
+BACKUP_USER="${BACKUP_USER:-citadel}"
+PROJECT_ROOT="${PROJECT_ROOT:-/home/nicolas/dev/quantumrick}"
+```
+
+Users can customize by setting environment variables before sourcing `backup.env`.
+
+### Systemd Integration
+- Templates in `backup/` directory contain `${VARIABLE}` placeholders
+- `install-service` script performs `sed` substitution to generate final systemd units
+- Generated units placed in `/etc/systemd/system/` with proper permissions
+
+### Security Model
+- Restic passwords auto-generated with OpenSSL
+- Configuration files have restricted permissions (600)
+- Scripts validate directory existence before operations
+- Restoration includes test mode for safety
+
+## Key Files and Their Roles
+
+### Configuration Layer
+- `backup.env`: Master configuration with all variables and utility functions
+- `config/restic.conf`: Generated Restic authentication and repository settings
+
+### Operational Scripts
+- `backup/manage`: Main interface (list, status, run, logs commands)
+- `backup/gen-conf.sh`: Secure configuration generator
+- `backup/init-restic.sh`: Repository initialization
+- `backup/install-service`: Systemd timer installation with template substitution
+
+### Templates and Restoration
+- `backup/service-backup@.{service,timer}`: Systemd unit templates with variable placeholders
+- `backup/restore`: Production-grade restoration with test mode and extensive validation
+- `backup/list-snapshots`: Snapshot browsing utility
+
+## Development Guidelines
+
+When adding new scripts:
+1. Add comment: `# Configuration should be sourced before running: source backup.env`
+2. Use variables from `backup.env` directly (do not auto-source)
+3. Follow the pattern of existing scripts for error handling and logging
+4. For systemd integration, use template substitution pattern from `install-service`
+
+When modifying configuration:
+- All path variables should have environment override capability
+- Maintain backward compatibility with default values
+- Update both `backup.env` and this documentation if adding new variables

README.md

@@ -0,0 +1,132 @@
+# QuantumRick Backup System
+
+Système de sauvegarde automatisé basé sur Restic avec intégration systemd pour services containerisés.
+
+## Structure du Projet
+
+```
+quantumrick/
+├── backup.env              # Configuration centralisée
+├── config/
+│   └── restic.conf         # Configuration Restic (générée)
+└── backup/
+    ├── manage              # Interface principale de gestion
+    ├── gen-conf.sh         # Génération de configuration Restic
+    ├── init-restic.sh      # Initialisation repository
+    ├── install-service     # Installation timers systemd
+    ├── list-snapshots      # Liste des snapshots
+    ├── restore             # Restauration
+    ├── service-backup@.service  # Template service systemd
+    └── service-backup@.timer    # Template timer systemd
+```
+
+## Prérequis
+
+**IMPORTANT:** Tous les scripts doivent être exécutés dans un environnement ayant sourcé la configuration :
+
+```bash
+# Toujours commencer par sourcer la configuration
+source backup.env
+
+# Puis exécuter les scripts
+./backup/manage list
+./backup/gen-conf.sh
+./backup/init-restic.sh
+```
+
+## Installation
+
+1. **Configuration initiale**
+   ```bash
+   # Copier et adapter la configuration
+   cp backup.env.sample backup.env
+   # Éditer backup.env selon votre environnement
+   
+   # Puis générer la configuration Restic
+   source backup.env
+   ./backup/gen-conf.sh
+   ```
+
+2. **Initialisation du repository**
+   ```bash
+   source backup.env
+   ./backup/init-restic.sh
+   ```
+
+3. **Installation d'un service**
+   ```bash
+   source backup.env
+   sudo ./backup/install-service <nom_service>
+   ```
+
+## Configuration
+
+### Variables principales (backup.env)
+
+- `BACKUP_USER` : Utilisateur système (défaut: citadel)
+- `PROJECT_ROOT` : Racine du projet
+- `SERVICES_BASE_DIR` : Répertoire des services à sauvegarder
+- `BACKUP_REPOSITORY` : Chemin du repository Restic
+- `DEFAULT_BACKUP_SCHEDULE` : Planning par défaut (défaut: *-*-* 03:00:00)
+
+### Personnalisation
+
+```bash
+# Exemple pour un autre utilisateur
+export BACKUP_USER="myuser"
+export BACKUP_HOME="/home/myuser"
+source backup.env
+
+# Puis utiliser normalement
+./backup/manage list
+```
+
+## Utilisation
+
+### Gestion des sauvegardes
+```bash
+source backup.env
+
+# Lister les timers
+./backup/manage list
+
+# Statut d'un service
+./backup/manage status paperless
+
+# Lancer une sauvegarde manuelle
+./backup/manage run paperless
+
+# Voir les logs
+./backup/manage logs paperless
+```
+
+### Restauration
+```bash
+source backup.env
+
+# Lister les snapshots
+./backup/list-snapshots paperless
+
+# Restaurer en mode test
+./backup/restore paperless --test
+
+# Restaurer en production
+./backup/restore paperless --production
+```
+
+## Développement
+
+Pour contribuer au projet, respectez la convention de sourcer `backup.env` dans tous vos scripts :
+
+```bash
+#!/bin/bash
+# Source configuration (scripts doivent être dans backup/)
+source "$(dirname "$(dirname "$0")")/backup.env"
+```
+
+## Architecture
+
+- **Configuration centralisée** : `backup.env` contient toutes les variables
+- **Scripts modulaires** : Chaque script a une responsabilité spécifique
+- **Templates systemd** : Variables substituées à l'installation
+- **Sécurité** : Mots de passe générés automatiquement

backup.env.sample

@@ -0,0 +1,78 @@
+#!/bin/bash
+# Configuration centralisée pour le système de backup quantumrick
+# Copiez ce fichier vers backup.env et adaptez les valeurs selon votre environnement
+
+# === Configuration Utilisateur ===
+# Utilisateur système qui exécutera les backups
+BACKUP_USER="${BACKUP_USER:-citadel}"
+BACKUP_HOME="${BACKUP_HOME:-/home/$BACKUP_USER}"
+
+# === Répertoires Principaux ===
+# Racine du projet quantumrick
+PROJECT_ROOT="${PROJECT_ROOT:-/home/nicolas/dev/quantumrick}"
+# Répertoire où les scripts de backup sont installés
+BACKUP_BASE_DIR="${BACKUP_BASE_DIR:-$BACKUP_HOME/backup}"
+# Répertoire contenant les services à sauvegarder
+SERVICES_BASE_DIR="${SERVICES_BASE_DIR:-$BACKUP_HOME/services}"
+# Répertoire de configuration du projet
+CONFIG_DIR="${CONFIG_DIR:-$PROJECT_ROOT/config}"
+
+# === Stockage des Sauvegardes ===
+# Chemin de base pour le stockage des backups
+BACKUP_STORAGE_PATH="${BACKUP_STORAGE_PATH:-/mnt/data/backup}"
+# Nom du repository Restic
+BACKUP_REPO_NAME="${BACKUP_REPO_NAME:-quantumrick}"
+# Chemin complet du repository Restic
+BACKUP_REPOSITORY="${BACKUP_REPOSITORY:-$BACKUP_STORAGE_PATH/$BACKUP_REPO_NAME}"
+
+# === Système ===
+# Répertoire des services systemd
+SYSTEMD_DIR="${SYSTEMD_DIR:-/etc/systemd/system}"
+# Répertoire des logs système
+LOG_DIR="${LOG_DIR:-/var/log}"
+# Répertoire temporaire
+TEMP_DIR="${TEMP_DIR:-/tmp}"
+
+# === Restic Configuration ===
+# Cache Restic
+RESTIC_CACHE_DIR="${RESTIC_CACHE_DIR:-$TEMP_DIR/restic-cache}"
+# Fichier de configuration Restic (généré automatiquement)
+RESTIC_CONFIG_FILE="${RESTIC_CONFIG_FILE:-$CONFIG_DIR/restic.conf}"
+
+# === Templates systemd ===
+# Nom des fichiers templates
+SERVICE_TEMPLATE="${SERVICE_TEMPLATE:-service-backup@.service}"
+TIMER_TEMPLATE="${TIMER_TEMPLATE:-service-backup@.timer}"
+
+# === Planning par défaut ===
+# Planning de sauvegarde par défaut (format systemd)
+# Exemples: "*-*-* 03:00:00" (quotidien 3h), "Mon *-*-* 04:00:00" (lundi 4h)
+DEFAULT_BACKUP_SCHEDULE="${DEFAULT_BACKUP_SCHEDULE:-*-*-* 03:00:00}"
+
+# === Variables d'export pour Restic ===
+export RESTIC_REPOSITORY="$BACKUP_REPOSITORY"
+export RESTIC_CACHE_DIR
+
+# Fonction utilitaire pour valider les chemins
+validate_paths() {
+    local paths=("$BACKUP_HOME" "$SERVICES_BASE_DIR" "$(dirname "$BACKUP_STORAGE_PATH")")
+    for path in "${paths[@]}"; do
+        if [[ ! -d "$path" ]]; then
+            echo "WARN: Directory $path does not exist" >&2
+        fi
+    done
+}
+
+# Fonction pour afficher la configuration courante
+show_config() {
+    echo "=== Configuration Backup ==="
+    echo "BACKUP_USER: $BACKUP_USER"
+    echo "BACKUP_HOME: $BACKUP_HOME"
+    echo "BACKUP_BASE_DIR: $BACKUP_BASE_DIR"
+    echo "SERVICES_BASE_DIR: $SERVICES_BASE_DIR"
+    echo "BACKUP_REPOSITORY: $BACKUP_REPOSITORY"
+    echo "RESTIC_CONFIG_FILE: $RESTIC_CONFIG_FILE"
+    echo "SYSTEMD_DIR: $SYSTEMD_DIR"
+    echo "LOG_DIR: $LOG_DIR"
+    echo "DEFAULT_BACKUP_SCHEDULE: $DEFAULT_BACKUP_SCHEDULE"
+}

backup/gen-conf.sh

@@ -1,12 +1,13 @@
 #!/bin/bash
 
 # Script to generate Restic configuration with secure password
-# Location: /home/citadel/services/paperless/generate-restic-config.sh
 
 set -e
 
-CONFIG_FILE="/home/citadel/backup/restic.conf"
+# Configuration should be sourced before running: source backup.env
-REPO_PATH="/mnt/data/backup/quantumrick"
+
+CONFIG_FILE="$RESTIC_CONFIG_FILE"
+REPO_PATH="$BACKUP_REPOSITORY"
 
 echo "=== Generating Restic Configuration ==="
 
@@ -28,7 +29,7 @@ RESTIC_PASSWORD=$(openssl rand -base64 32)
 # Create configuration file
 echo "Creating configuration file..."
 cat > "$CONFIG_FILE" << EOF
-# Restic configuration for Paperless NGX backups
+# Restic configuration for quantumrick backups
 # Generated on $(date)
 
 # Repository path
@@ -38,7 +39,7 @@ export RESTIC_REPOSITORY="$REPO_PATH"
 export RESTIC_PASSWORD="$RESTIC_PASSWORD"
 
 # Cache directory (optional)
-export RESTIC_CACHE_DIR="/tmp/restic-cache"
+export RESTIC_CACHE_DIR="$RESTIC_CACHE_DIR"
 EOF
 
 # Set secure permissions
@@ -50,5 +51,6 @@ echo ""
 echo "⚠️  IMPORTANT: Save this password somewhere safe!"
 echo "   If you lose it, you won't be able to restore your backups!"
 echo ""
-echo "Password: $RESTIC_PASSWORD"
+echo "📁 Password saved in: $CONFIG_FILE"
+echo "   Use 'cat $CONFIG_FILE' to view the password if needed"
 echo ""

backup/init-restic.sh

@@ -1,12 +1,13 @@
 #!/bin/bash
 
-# Script to initialize Restic repository for Paperless NGX backups
+# Script to initialize Restic repository for quantumrick backups
-# Location: /home/citadel/services/paperless/init-restic-repo.sh
 
 set -e
 
-REPO_PATH="/mnt/data/backup/quantumrick"
+# Configuration should be sourced before running: source backup.env
-CONFIG_FILE="/home/citadel/backup/restic.conf"
+
+REPO_PATH="$BACKUP_REPOSITORY"
+CONFIG_FILE="$RESTIC_CONFIG_FILE"
 
 echo "=== Initializing Restic Repository ==="
 

backup/install-service

@@ -1,11 +1,12 @@
 #!/bin/bash
 
 # Generic script to install systemd timer for any service backup
-# Location: /home/citadel/backup/install-service-timer.sh
 # Usage: sudo ./install-service.sh <service_name> [schedule]
 
 set -e
 
+# Configuration should be sourced before running: source backup.env
+
 # Check arguments
 if [ $# -lt 1 ]; then
     echo "Usage: $0 <service_name> [schedule]"
@@ -16,21 +17,21 @@ if [ $# -lt 1 ]; then
     echo "  $0 gitlab \"Mon *-*-* 04:00:00\"  # Weekly on Monday at 4:00 AM"
     echo ""
     echo "Available services with backup.sh:"
-    find /home/citadel/services -name "backup.sh" -printf "  %h\n" | sed 's|/home/citadel/services/||' 2>/dev/null || echo "  (none found)"
+    find "$SERVICES_BASE_DIR" -name "backup.sh" -printf "  %h\n" | sed "s|$SERVICES_BASE_DIR/||" 2>/dev/null || echo "  (none found)"
     exit 1
 fi
 
 SERVICE_NAME="$1"
-SCHEDULE="${2:-*-*-* 03:00:00}"  # Default: daily at 3:00 AM
+SCHEDULE="${2:-$DEFAULT_BACKUP_SCHEDULE}"  # Use default from config
 
-SERVICE_DIR="/home/citadel/services/$SERVICE_NAME"
+SERVICE_DIR="$SERVICES_BASE_DIR/$SERVICE_NAME"
 BACKUP_SCRIPT="$SERVICE_DIR/backup.sh"
-BACKUP_DIR="/home/citadel/backup"
+BACKUP_DIR="$BACKUP_BASE_DIR"
 
 # Systemd template files
-SERVICE_TEMPLATE="service-backup@.service"
+SERVICE_TEMPLATE="$SERVICE_TEMPLATE"
-TIMER_TEMPLATE="service-backup@.timer"
+TIMER_TEMPLATE="$TIMER_TEMPLATE"
-SYSTEMD_DIR="/etc/systemd/system"
+SYSTEMD_DIR="$SYSTEMD_DIR"
 
 # Instance names
 SERVICE_INSTANCE="service-backup@$SERVICE_NAME.service"
@@ -83,21 +84,20 @@ if systemctl is-enabled --quiet "$TIMER_INSTANCE" 2>/dev/null; then
     systemctl disable "$TIMER_INSTANCE"
 fi
 
-# Copy template files if they don't exist in systemd directory
+# Generate service and timer files with substituted variables
-if [ ! -f "$SYSTEMD_DIR/$SERVICE_TEMPLATE" ]; then
+echo "Generating service file with current configuration..."
-    echo "Installing service template..."
+sed -e "s|\${BACKUP_USER}|$BACKUP_USER|g" \
-    cp "$BACKUP_DIR/$SERVICE_TEMPLATE" "$SYSTEMD_DIR/"
+    -e "s|\${SERVICES_BASE_DIR}|$SERVICES_BASE_DIR|g" \
-    chmod 644 "$SYSTEMD_DIR/$SERVICE_TEMPLATE"
+    "$BACKUP_DIR/$SERVICE_TEMPLATE" > "$SYSTEMD_DIR/$SERVICE_TEMPLATE"
-fi
+chmod 644 "$SYSTEMD_DIR/$SERVICE_TEMPLATE"
 
-if [ ! -f "$SYSTEMD_DIR/$TIMER_TEMPLATE" ]; then
+echo "Generating timer file with current configuration..."
-    echo "Installing timer template..."
+sed -e "s|\${DEFAULT_BACKUP_SCHEDULE}|$DEFAULT_BACKUP_SCHEDULE|g" \
-    cp "$BACKUP_DIR/$TIMER_TEMPLATE" "$SYSTEMD_DIR/"
+    "$BACKUP_DIR/$TIMER_TEMPLATE" > "$SYSTEMD_DIR/$TIMER_TEMPLATE"
-    chmod 644 "$SYSTEMD_DIR/$TIMER_TEMPLATE"
+chmod 644 "$SYSTEMD_DIR/$TIMER_TEMPLATE"
-fi
 
 # Create custom timer with specific schedule if different from default
-if [ "$SCHEDULE" != "*-*-* 03:00:00" ]; then
+if [ "$SCHEDULE" != "$DEFAULT_BACKUP_SCHEDULE" ]; then
     echo "Creating custom timer with schedule: $SCHEDULE"
     sed "s|OnCalendar=\*-\*-\* 03:00:00|OnCalendar=$SCHEDULE|" \
         "$BACKUP_DIR/$TIMER_TEMPLATE" > "$SYSTEMD_DIR/$TIMER_INSTANCE"
@@ -114,9 +114,9 @@ systemctl enable "service-backup@$SERVICE_NAME.timer"
 systemctl start "service-backup@$SERVICE_NAME.timer"
 
 # Create log file with proper permissions
-LOG_FILE="/var/log/$SERVICE_NAME-backup.log"
+LOG_FILE="$LOG_DIR/$SERVICE_NAME-backup.log"
 touch "$LOG_FILE"
-chown citadel:citadel "$LOG_FILE"
+chown "$BACKUP_USER:$BACKUP_USER" "$LOG_FILE"
 
 echo ""
 echo "✅ Systemd timer installed successfully for $SERVICE_NAME!"

backup/list-snapshots

@@ -1,14 +1,15 @@
 #!/bin/bash
 
 # Script to list available snapshots from Restic repository
-# Location: /home/citadel/backup/list-snapshots
 # Usage: ./list-snapshots [service_name]
 
 set -e
 
+# Configuration should be sourced before running: source backup.env
+
 # Configuration
-BACKUP_DIR="/home/citadel/backup"
+BACKUP_DIR="$BACKUP_BASE_DIR"
-CONFIG_FILE="$BACKUP_DIR/restic.conf"
+CONFIG_FILE="$RESTIC_CONFIG_FILE"
 
 # Colors for output
 BLUE='\033[0;34m'

backup/manage

@@ -1,12 +1,13 @@
 #!/bin/bash
 
 # Script to manage backup timers for all services
-# Location: /home/citadel/backup/manage
 
 set -e
 
-BACKUP_DIR="/home/citadel/backup"
+# Configuration should be sourced before running: source backup.env
-SERVICES_DIR="/home/citadel/services"
+
+BACKUP_DIR="$BACKUP_BASE_DIR"
+SERVICES_DIR="$SERVICES_BASE_DIR"
 
 show_help() {
     echo "Usage: $0 <command> [service_name]"

backup/restic.conf

@@ -1,11 +0,0 @@
-# Restic configuration for Paperless NGX backups
-# Generated on Mon Jun  9 11:45:41 CEST 2025
-
-# Repository path
-export RESTIC_REPOSITORY="/mnt/data/backup/quantumrick"
-
-# Repository password
-export RESTIC_PASSWORD="CHANGE-ME"
-
-# Cache directory (optional)
-export RESTIC_CACHE_DIR="/tmp/restic-cache"

backup/restore

@@ -1,15 +1,16 @@
 #!/bin/bash
 
 # Restic backup restore script
-# Location: /home/citadel/backup/restore
 # Usage: ./restore <service_name> [--test|--production]
 
 set -euo pipefail  # Strict mode: exit on error, undefined vars, pipe failures
 
+# Configuration should be sourced before running: source backup.env
+
 # Configuration
-readonly BACKUP_DIR="/home/citadel/backup"
+readonly BACKUP_DIR="$BACKUP_BASE_DIR"
-readonly SERVICES_DIR="/home/citadel/services"
+readonly SERVICES_DIR="$SERVICES_BASE_DIR"
-readonly CONFIG_FILE="$BACKUP_DIR/restic.conf"
+readonly CONFIG_FILE="$RESTIC_CONFIG_FILE"
 readonly SCRIPT_NAME=$(basename "$0")
 readonly VERSION="2.1.0"
 
@@ -269,7 +270,7 @@ create_secure_temp_dir() {
     local temp_dir
 
     # Use mktemp to create a secure temporary directory
-    temp_dir=$(mktemp -d "/tmp/${prefix}-$(date +%Y%m%d-%H%M%S)-XXXXXX")
+    temp_dir=$(mktemp -d "$TEMP_DIR/${prefix}-$(date +%Y%m%d-%H%M%S)-XXXXXX")
 
     if [ ! -d "$temp_dir" ]; then
         error "Failed to create temporary directory"
@@ -324,7 +325,7 @@ run_custom_restore() {
     log "Mode: $mode"
 
     # Create restore log
-    local log_file="/tmp/restore-${service}-$(date +%Y%m%d-%H%M%S).log"
+    local log_file="$TEMP_DIR/restore-${service}-$(date +%Y%m%d-%H%M%S).log"
 
     # Change directory with verification
     if ! cd "$service_dir"; then

backup/service-backup@.service

@@ -5,14 +5,13 @@ Requires=docker.service
 
 [Service]
 Type=oneshot
-User=citadel
+User=${BACKUP_USER}
-Group=citadel
+Group=${BACKUP_USER}
-WorkingDirectory=/home/citadel/services/%i
+WorkingDirectory=${SERVICES_BASE_DIR}/%i
-ExecStart=/home/citadel/services/%i/backup.sh
+ExecStart=${SERVICES_BASE_DIR}/%i/backup.sh
 StandardOutput=journal
 StandardError=journal
 Environment=PATH=/usr/local/bin:/usr/bin:/bin
 
-
 [Install]
 WantedBy=multi-user.target

backup/service-backup@.timer

@@ -3,8 +3,8 @@ Description=Daily Backup Timer for %i
 Requires=service-backup@%i.service
 
 [Timer]
-# Run daily at 3:00 AM
+# Run daily at configured time
-OnCalendar=*-*-* 03:00:00
+OnCalendar=${DEFAULT_BACKUP_SCHEDULE}
 # If system was down during scheduled time, run on next boot
 Persistent=true
 # Add randomization to avoid conflicts with other services