Configuring Multi-Region Failover with AWS Route 53
Introduction
Use AWS Route 53 to implement multi-region failover, ensuring high availability by routing traffic away from unhealthy regions.
Prerequisites
- Two or more AWS regions with endpoints
- Route 53 hosted zone
Step 1: Create Health Checks
aws route53 create-health-check \
--caller-reference "primary-endpoint-check" \
--health-check-config 'Target="app-primary.example.com",Port=80,Type=HTTP,ResourcePath="/health"'
Repeat for secondary endpoint.
Step 2: Create Failover Record Sets
In Route 53 console or CLI, create two record sets for your domain:
- Primary: Type A, Alias or Value points to primary resource, Routing Policy: Failover, Set ID: “primary”, Health Check: primary.
- Secondary: Type A, Alias or Value points to secondary resource, Routing Policy: Failover, Set ID: “secondary”, Health Check: secondary.
Step 3: Test Failover
Simulate failure of primary endpoint by failing health check or stopping service. Route 53 will route traffic to secondary.
Summary
Route 53 multi-region failover uses health checks and failover record sets to maintain availability across regions.