Azure MySQL Backup: 10-Year Retention & Ransomware
I developed a secure, automated backup solution for Azure MySQL Flexible Server that allows for a 10-year data retention period, addressing the inherent 35-day limitation. I implemented a "Data Bunker" approach using Azure Automation and Private Endpoints to keep backups isolated in a different subscription, safeguarding them from ransomware threats. The design utilizes temporary VMs, which decreases computing expenses by 95% compared to using dedicated servers. Result: A fully compliant, air-gapped Disaster Recovery system ready for ISO and HIPAA audits.
**The Challenge:** A regulated enterprise client utilizing Azure Database for MySQL Flexible Server was confronted with a significant compliance risk. They needed a policy for retaining data for 10 years for legal audits, but the standard Azure backup solution only supports a maximum of 35 days. Furthermore, their Chief Information Security Officer mandated a "Data Bunker" strategy, requiring that backups be stored in a fully isolated Azure subscription to shield them from ransomware attacks affecting the production environment.
**The Solution:** I designed and implemented a custom Serverless Automation Architecture that overcomes native limitations while adhering to stringent security protocols. Rather than a basic script, I established a comprehensive infrastructure ecosystem:
- **Security First:** I set up a specific "Backup VNet" with Azure Private Endpoints, ensuring that all database traffic is routed solely through the Microsoft Backbone network, keeping the database secure and unseen.