How to delete untagged images from AWS ECR Container Registry

Question

When pushing images to Amazon ECR, if the tag already exists within the repo the old image remains within the registry but goes in an untagged state.

So if i docker

Answer 1

Setting a Lifecycle policy is definitely the best way of managing this. That being said - if you do have a bunch of images that you want to delete keep in mind that the max for batch-delete-images is 100. So you need to do this is for the number of untagged images is greater than 100:

IMAGES_TO_DELETE=$( aws ecr list-images --repository-name $ECR_REPO --filter "tagStatus=UNTAGGED" --query 'imageIds[0:100]' --output json )
echo $IMAGES_TO_DELETE | jq length # Gets the number of results
aws ecr batch-delete-image --repository-name $ECR_REPO --image-ids "$IMAGES_TO_DELETE" --profile qa || true