Making configuration changes typically needs a restart of the application

And what if you want to control the roll out of a configuration change (canary approach, ..)?

AWS AppConfig: Create, manage, & quickly deploy application configurations

(Feature) Configuration can be stored in Amazon Simple Storage Service (Amazon S3), AWS

AppConfig hosted configurations, Parameter Store, ...

(Feature) Use a JSON schema or write a Lambda function to validate your configuration

before it is deployed

(Feature) Control the speed of deployment of the new configuration

Monitor deployments and automatically roll back in case of errors (integrates with CloudWatch alarms)

Advantages:

Reduce errors in configuration changes

Deploy changes across a set of targets quickly

Update applications without interruptions

Control deployment of changes across your application