A company is releasing an updated version of its website but wants to expose it to only 20% of users initially. The DNS is managed in Amazon Route 53. Which Route 53 configuration will accomplish a controlled 20% rollout?
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Correct answer: Use a weighted routing policy. Assign a weight of 80 to the record for the existing site and a weight of 20 to the record for the new site..
Why this is the answer
Weighted routing policies in Amazon Route 53 allow you to route traffic to multiple resources in proportions that you specify. By assigning a weight of 80 to the existing site's record and a weight of 20 to the new site's record, 20% of DNS queries will be directed to the new version, fulfilling the requirement for a controlled rollout. Failover routing policies are used for high availability, directing traffic to a secondary resource only when the primary is unhealthy. Multivalue answer routing returns up to eight healthy records, which isn't suitable for precise percentage-based traffic distribution. Latency-based routing directs traffic to the resource with the lowest latency, not a specified percentage.
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