gcr-clean is a small helper to clean unused manifests from the GCR inside a Google Cloud Project. It takes all manifests not anymore tagged and deletes them.
It supports reading authentication information from Google Application Default Credentials (account.json) or the Docker configuration.
$ gcr-clean --help
Usage of gcr-clean:
--account string Path to account.json file with GCR access
--listen string Port/IP to listen on (default ":3000")
--log-level string Log level (debug, info, warn, error, fatal) (default "info")
-n, --noop Do not execute destructive DELETE operation (default true)
-p, --parallel int How many deletions to execute in parallel (default 10)
--registry string The registry used (gcr.io, eu.gcr.io, us.gcr.io, ...) (default "gcr.io")
--version Prints current version and exits
$ gcr-clean luzifer-registry
INFO[0000] Fetching repositories...
INFO[0001] Manifest deleted manifest="sha256:a411[...]" noop=true repo=luzifer-registry/eventsys