Amazon ECS Service Events Now Available as CloudWatch Events
Amazon Elastic Container Service (ECS) now publishes ECS Service Action events to Amazon CloudWatch Events. CloudWatch Events delivers a near real-time stream of system events that describe changes in AWS resources. Using simple rules that you can quickly set up, you can match events and route them to one or more target functions or streams, including AWS Lambda for event processing with custom business logic, Amazon Simple Notification Service for automated notifications, or CloudWatch Logs for event logging.
Source:: Amazon AWS