AWS RDS Blue/Green Deployment for Aurora using Terraform
Briefly

RDS Blue/Green Deployment feature creates a new Staging/Green cluster from the current Production/Blue cluster, minimizing downtime for upgrades.
Blue/Green Deployment enables testing of new DB features and changes in a staging environment without impacting the production cluster.
DB major version upgrades with Blue/Green Deployment reduce downtime during upgrades and offer a seamless switch to the new Production/Blue cluster.
Read at Medium
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