Question

A DevOps team runs a fleet of microservices on ECS Fargate across three environments. They want to dynamically toggle a beta feature at runtime without redeploying task definitions, and they need the ability to automatically roll back the flag change if the service's CloudWatch error-rate alarm fires within a validation window. The configuration must be managed as code and version-controlled. Which AWS Systems Manager capability best meets these requirements?

Accepted Answer

Use AWS AppConfig with a feature flag configuration profile, deploy using a deployment strategy that includes a bake time, and associate a CloudWatch alarm for automatic rollback.

Answer

Store the feature flag as a SecureString in SSM Parameter Store and have each task poll the parameter on a fixed interval.

Answer

Use SSM State Manager associations to push a new environment variable file to each task and reschedule the service.

Answer

Store the flag in SSM Parameter Store and use EventBridge to trigger a CodeDeploy blue/green deployment whenever the parameter changes.