Route53 DNS Failover Stack

Route53 Active-Passive DNS Failover via CloudFormation

A CloudFormation stack that configures Route53 health checks on your primary endpoint, primary and secondary failover DNS records, an SNS alert when failover activates, and a recovery detection alarm when the primary comes back healthy.

What's Included

• Route53 HTTP/HTTPS health check with configurable path, threshold, and interval
• Primary failover record (ALIAS or weighted) pointing to your main endpoint
• Secondary failover record pointing to your standby endpoint or S3 static site
• CloudWatch alarm on the health check metric wired to SNS
• SNS topic with email subscription for failover and recovery notifications
• Recovery alarm that fires when the primary returns to healthy

What You Get

• dns-failover.yaml — CloudFormation template
• parameters/ — parameter files for ALB primary, EC2 primary, and S3 secondary variants
• README.md — health check tuning, failover timing expectations, and testing procedure

Requirements

• AWS account with Route53 and CloudWatch permissions
• Existing hosted zone in Route53
• Primary and secondary endpoints reachable from Route53 health checkers (public IPs or endpoints)