AWS IoT Greengrass now emits deployment notifications to Amazon EventBridge. Greengrass sends an event every time a Greengrass group deployment changes state. Customers can create EventBridge rules to take actions based on deployment changes. With this new feature, customers can send notifications, capture event information, take corrective action, or initiate other events for deployments.  

from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/10/aws-iot-greengrass-now-provides-deployment-notifications/