Automatic Cleanup of Old Zigbee2MQTT Backups

🌐 Overview

This Bash script automates the cleanup of old Zigbee2MQTT backup files, ensuring that only recent backups are retained. The script is designed to:

• Locate backup files older than 7 days.
• Remove outdated backup archives (.tar.gz) from the backup directory.
• Log all deletion events for monitoring and auditing.

This prevents excessive storage consumption and keeps backup storage efficient and manageable.

Scheduled Execution

This script should be executed automatically via a CRON job to ensure periodic cleanup without manual intervention.

🛠 Configuration File

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/cleanup_zigbee2mqtt_backups.sh

#!/bin/bash
 
SCRIPT_DIR=$(dirname "$(realpath "$0")")
source "${SCRIPT_DIR}/config.sh"
 
backups_dir="${homebridge_dir}${zigbee2mqtt_service}/backups/"
age_days=7
 
current_date=$(date +%s)
 
find "$backups_dir" -maxdepth 1 -type f -name '*.tar.gz' | while read -r backup_file; do
    file_date=$(date -r "$backup_file" +%s)
    age=$(( (current_date - file_date) / 86400 ))
 
    if [ "$age" -ge "$age_days" ]; then
        rm -f "$backup_file"
        echo "$(date) - Deleted obsolete backup: $backup_file" >> "$backup_log"
    fi
done