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Debian Node.js log backup and recovery strategy
Debian Node.js log backup and recovery strategy
Apr 12, 2025 pm 09:30 PM
In order to ensure the log security of Node.js applications in Debian systems, this article provides a complete set of log backup and recovery policies to ensure rapid recovery in case of system failure or data loss.
1. Log backup
1.1 Regular backup: use rsync
rsync is a powerful file synchronization tool that enables regular backup of log files:
# Create backup directory mkdir -p /backup/logs # Use rsync to backup logs rsync -av --delete /var/log/nodejs /backup/logs/
1.2 Timed tasks: crontab
Create a backup script and execute it regularly using crontab:
# Create backup script echo '#!/bin/bash' > /usr/local/bin/backup_nodejs_logs.sh echo 'rsync -av --delete /var/log/nodejs /backup/logs/' >> /usr/local/bin/backup_nodejs_logs.sh echo 'date >> /backup/logs/backup.log' >> /usr/local/bin/backup_nodejs_logs.sh chmod x /usr/local/bin/backup_nodejs_logs.sh # Edit crontab crontab -e # Perform backup at 2 am every day 0 2 * * * /usr/local/bin/backup_nodejs_logs.sh
2. Log recovery
2.1 Recover log files
Use rsync to copy the backup log back to its original location:
# Recover log file rsync -av /backup/logs/nodejs /var/log/nodejs
2.2 Verify recovery results
Check the integrity and availability of recovery logs:
# View the restored log tail -f /var/log/nodejs/app.log
3. Monitoring and Alarm
3.1 Monitoring Tools
Use monitoring tools such as Prometheus and Grafana to monitor log file sizes and changes and set alarms.
3.2 Alarm settings
Configure alarm rules in Prometheus and set alert notifications in Grafana, for example:
# Prometheus Alarm Rule Sample Groups:
- name: nodejs_logs
Rules:
- alert: LargeLogFileSize
expr: size(nodejs_log_file) > 100MB
for: 1h
labels:
severity: warning
annotations:
summary: "Log file is too large"
Description: "Log file {{ $labels.instance }} has a size of more than 100MB."
4. Automatic testing
4.1 Automated test scripts
Write automated test scripts to verify the backup and recovery process:
#!/bin/bash # Create a temporary directory mkdir -p /tmp/backup_logs # Perform backup rsync -av --delete /var/log/nodejs /tmp/backup_logs/ # Verify the backup file if [ -d "/tmp/backup_logs/nodejs" ]; then echo "Backup successful" else echo "Backup failed" fi # Clean up the temporary directory rm -rf /tmp/backup_logs
4.2 Run tests regularly
Add test scripts to crontab and run them regularly to ensure the reliability of the backup and recovery process:
# Edit crontab crontab -e # Run the test script every Monday at 3pm 0 15 * * 1 /path/to/backup_test_script.sh
Through the above strategies, you can effectively manage log backup and recovery of Node.js applications on Debian systems, improving system reliability and maintainability.
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