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#!/usr/bin/env python3
import argparse
import boto3
parser = argparse.ArgumentParser(
description='Implement basic public ECR lifecycle policy')
parser.add_argument('--repo', dest='repositoryName', action='store', required=True,
help='Name of the public ECR repository')
parser.add_argument('--keep', dest='keep', action='store', default=10, type=int,
help='number of tagged images to keep, default 10')
parser.add_argument('--dev', dest='delete_dev', action='store_true',
help='also delete in-development images only having tags like v0.1.1-commitNr-githash')
args = parser.parse_args()
client = boto3.client('ecr-public', region_name='us-east-1')
images = client.describe_images(repositoryName=args.repositoryName)[
untagged = []
kept = 0
# actual Image
# imageManifestMediaType: 'application/vnd.oci.image.manifest.v1+json'
# image Index
# imageManifestMediaType: 'application/vnd.oci.image.index.v1+json'
# Sort by date uploaded
for image in sorted(images, key=lambda d: d['imagePushedAt'], reverse=True):
# Remove all untagged
# if registry uses image index all actual images will be untagged anyways
if 'imageTags' not in image:
untagged.append({"imageDigest": image['imageDigest']})
# print("Delete untagged image {}".format(image["imageDigest"]))
# check for dev tags
if args.delete_dev:
_delete = True
for tag in image["imageTags"]:
# Look for at least one tag NOT beign a SemVer dev tag
if "-" not in tag:
_delete = False
if _delete:
print("Deleting development image {}".format(image["imageTags"]))
untagged.append({"imageDigest": image['imageDigest']})
if kept < args.keep:
kept = kept+1
print("Keeping tagged image {}".format(image["imageTags"]))
print("Deleting tagged image {}".format(image["imageTags"]))
untagged.append({"imageDigest": image['imageDigest']})
deleted_images = client.batch_delete_image(
repositoryName=args.repositoryName, imageIds=untagged)
if deleted_images["imageIds"]:
print("Deleted images: {}".format(deleted_images["imageIds"]))