Get all image sizes across your GCP organization with tags

gcr-get-image-sizes.py

import google.auth
from google.auth.transport.requests import AuthorizedSession

###  Global vars
REGISTRY_BASE = 'https://us.gcr.io/v2'
###

try:
    credentials, project = google.auth.default(scopes=['https://www.googleapis.com/auth/cloud-platform'])
    authed_session = AuthorizedSession(credentials)
except Exception as e:
    print(e)

response = authed_session.get(f'{REGISTRY_BASE}/_catalog')
repos = response.json()['repositories']
for repo in repos:
    url = f'{REGISTRY_BASE}/{repo}/tags/list'
    tags = authed_session.get(url).json()
    for digest_id, digest_meta in tags.get('manifest').items():
        print(tags.get('name'),digest_meta['imageSizeBytes'],digest_id)