Route 53 Failover Routing Between ALBs
Configure Route 53 failover routing with health checks across two Application Load Balancers and simulate a primary-site failure to observe automatic DNS failover.
Lab Overview
Build a DNS failover architecture on AWS using Route 53 and two Application Load Balancers. You will deploy a primary and secondary web tier in separate subnets, create a Route 53 private hosted zone with failover routing records and health checks, then simulate a primary-site outage to verify automatic DNS failover to the secondary ALB.
You'll learn to:
- Deploy two independent ALB-backed web tiers in different Availability Zones
- Create a Route 53 private hosted zone and associate it with a VPC
- Configure Route 53 health checks against ALB endpoints
- Set up failover routing policy with primary and secondary records
- Simulate a failure and observe automatic DNS failover
- Verify failback when the primary tier recovers
Key Resources:
What You'll Learn
Deploy two independent web tiers behind Application Load Balancers
Create and configure a Route 53 private hosted zone
Configure Route 53 health checks to monitor ALB endpoints
Implement failover routing policy with primary and secondary records
Simulate a failure and verify automatic DNS failover behavior
Prerequisites
Basic AWS CLI familiarity
Understanding of VPC and subnets
Understanding of Application Load Balancers
Technologies Covered
Part of a Course
This lab is part of the AWS Solutions Architect Associate (SAA-C03) course
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