2. Solution Overview

The high-availability database cluster is designed to provide continuous database availability by leveraging a multi-node PostgreSQL architecture. The solution employs:

• Automated failover and master election using Patroni in conjunction with etcd.
• Load balancing through HAProxy to ensure even distribution of client requests.
• Distributed file storage with GlusterFS for configuration and data replication.
• Robust networking, firewall, and NAT configurations to secure internal communications.

This overview explains the core concepts that make the system resilient and scalable, ensuring minimal downtime even in adverse conditions.