💻 dawid.dev

Zigbee2MQTT Git Backup Sync

2 min read

🌐 Overview

This Bash script automates the backup of Zigbee2MQTT data. It begins by defining the locations for the log file, source directory, and backup directory, which are now managed via an external configuration file (config.sh) for better maintainability.

The script ensures that the backup directory exists before proceeding. It then creates a compressed tarball of the Zigbee2MQTT data, excluding the backup directory itself, and names the backup file with a timestamp.

If the backup creation is successful, the script logs this event with a timestamp in the log file. If the backup creation fails, it logs an error message. This ensures that the Zigbee2MQTT data is consistently and securely backed up.

Script Execution via CRON

This script has been designed to run automatically via a CRON job on the server, ensuring consistent and unattended backups of Zigbee2MQTT data.

🛠 Configuration File (config.sh)

src/config.sh
#!/bin/bash
 
# Define base directories
base_dir="/var/www/"
homebridge_dir="${base_dir}homebridge/"
repo_dir="${base_dir}backup/"
scripts_dir="${base_dir}scripts/"
 
# Define subdirectories
src_dir="${repo_dir}src/"
backup_dir="${repo_dir}backup/"
 
# Define service names
homebridge_service="homebridge"
zigbee2mqtt_service="zigbee2mqtt"
 
# Define script and config filenames
config_sh="config.sh"
backup_sh="backup.sh"
backup_zigbee2mqtt_sh="backup_zigbee2mqtt.sh"
cleanup_zigbee2mqtt_backups_sh="cleanup_zigbee2mqtt_backups.sh"
 
# Define log files
log_dir="/var/log/"
backup_log="${log_dir}backup.log"

🚀 Script

src/backup_zigbee2mqtt.sh
#!/bin/bash
 
# Define script and configuration directory
SCRIPT_DIR=$(dirname "$(realpath "$0")")
source "${SCRIPT_DIR}/config.sh"
 
source_dir="${homebridge_dir}${zigbee2mqtt_service}/"
backup_dir="backups"
 
# Ensure backup directory exists
mkdir -p "${source_dir}${backup_dir}"
 
# Define backup file with timestamp
backup_file="${source_dir}${backup_dir}/${zigbee2mqtt_service}-backup-$(date +%Y%m%d%H%M%S).tar.gz"
 
# Create backup
tar --exclude="./${backup_dir}" -czf "$backup_file" -C "$source_dir" .
 
# Log success or failure
if [ $? -eq 0 ]; then
    echo "$(date) - Backup created successfully: $backup_file" >> "$backup_log"
else
    echo "$(date) - Backup failed" >> "$backup_log"
fi

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