Question

A CloudOps engineer manages a production web application served by two independent, identical environments (blue and green), each fronted by its own Application Load Balancer in the same Region. The team wants to release a new version deployed to the green environment by gradually shifting a small percentage of live user traffic to it, monitoring for errors, and increasing the percentage over time if metrics stay healthy. If problems appear, they must be able to send all traffic back to blue almost immediately. Which Amazon Route 53 configuration best meets these requirements?

Accepted Answer

Create weighted routing records pointing to the blue and green ALBs, initially assigning a high weight to blue and a low weight to green, then adjust the weights over time.

Answer

Create a failover routing policy with blue as primary and green as secondary, attaching health checks to each ALB.

Answer

Create a latency-based routing policy with records for the blue and green ALBs so users are directed to the fastest-responding environment.

Answer

Create a multivalue answer routing policy returning both ALB records so clients randomly balance across blue and green.