Practice Test 4 | AWS Certified Solutions Architect Associate | SAA-C03 | Dumps | Mock Test

Answer – D

AWS Documentation mentions that Weighted routing policy is good for testing new versions of the software. And that this is the ideal approach for Blue-Green deployments.

Weighted routing lets you associate multiple resources with a single domain name (example.com) or subdomain name (acme.example.com) and choose how much traffic is routed to each resource. This can be useful for a variety of purposes, including load balancing and testing new versions of software.

For more information on Route 53 routing policies, please visit the following URL:

https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/routing-policy.html

Note: Multivalue-answer is recommended to use only when you want to route traffic randomly to multiple resources, such as web servers, you can create one multivalue answer record for each resource and, optionally, associate an Amazon Route 53 health check with each record.

However, in our case, we need to choose how much traffic is routed to each resource (blue and green). For example, Blue is currently live and we need to send less portion of traffic to Green, to check everything works fine. If yes, then we can decide to go with Green resources. If no, we can change the weight for that record to 0. Blue will be completely live again.

NOTE:

When you implement the Blue-Green Deployment, It’s not always fixed that Blue environment in Alive state and Green environment in Idle state vice versa. During the testing phase, you can route your traffic to both Blue and Green environment with specified traffic load.

Reference Link:

• https://d1.awsstatic.com/whitepapers/AWS_Blue_Green_Deployments.pdf (11 of 35). AWS explained with the proper diagram.