How do AWS ECR Lifecycle policies interact with multiplatform images

Question

Specifically, if i have a policy that says to delete images without tags, and i push a multiplatform image - the "Image Index" is tagged, but the "Image" artifact is not tagged. will it get cleaned up by the policy, even though it would not have been had it not been a multiplatform image?

Answer 1

According to the docs: https://docs.aws.amazon.com/AmazonECR/latest/userguide/LifecyclePolicies.html "If an image is referenced by a manifest list, it cannot be expired without the manifest list being deleted first." So even though only the manifest/image-index is tagged for longer expiration, the referenced images will be preserved.