Question

A company stores application configuration values in AWS Systems Manager Parameter Store. Developers frequently update a parameter named /app/prod/feature-flags. After a recent bad configuration change caused an outage, the SysOps team needs a way to quickly revert to the previous known-good value without manually recreating the parameter, and they want the application to always retrieve the current value by default. Which approach meets these requirements with the least operational effort?

Accepted Answer

Rely on Parameter Store standard parameter versioning: reference the parameter by name to get the latest version, and revert by retrieving a prior version number and setting it as the new latest value.

Answer

Enable S3 versioning on a bucket, export the parameter to S3 on every change, and restore the object from a previous version when a rollback is needed.

Answer

Create a new parameter with an incremented suffix (e.g., feature-flags-v2) for each change and update the application code to point to the newest name.

Answer

Enable AWS Backup for Parameter Store to capture point-in-time snapshots and restore the parameter from the most recent recovery point.