For mission-critical applications, relying on a single AWS region is a risk. True high-availability requires active-active multi-region deployments that route users dynamically to the nearest healthy server.
This guide explains how to build a multi-region active-active cloud architecture on AWS.
1. Network Routing via Route 53
Use Route 53 Latency-Based Routing to send traffic automatically to the AWS region offering the lowest latency for that specific user. Configure active health checks to failover to the alternative region if the primary region goes offline.
2. Multi-Region Kubernetes with Amazon EKS
Deploy identical EKS clusters across your target regions. Manage deployments using git-ops (e.g. ArgoCD) to ensure application code and environment settings are synchronized across all regions.
3. Database Synchronization with Aurora Global
Deploy Amazon Aurora Global Database to replicate write operations across regions in under 1 second. Write applications to execute writes to the primary writer region, while serving read requests locally from the local read replicas.