AMI Lifecycle Management now available with Data Lifecycle Manager
Amazon Data Lifecycle Manager (DLM) now supports the creation and retention of EBS-backed Amazon Machine Images (AMIs). In addition to defining policies that provide a simple, automated way to back up data stored on EBS volumes, you can now create policies targeting EC2 instances to create EBS-backed AMIs. With this feature, you no longer have to rely on custom scripts to manage your AMIs. Nor will you need to manually delete associated snapshots once an AMI has been de-registered.
Source:: Amazon AWS