AWS RDS Blue/Green Deployment for Aurora using Terraform

Why ?
If you are using AWS RDS and you have any of the following use cases.

• Upgrade DB Major/Minor version without impacting LIVE production cluster with zero downtime.
• Easily create a production-ready staging environment side by side to production to perform specific tests.
• Test database changes in a separate staging environment without affecting the production cluster.
• Implement and test new DB features on staging cluster before doing it on production.

Please take a look at this article for detailed information.