Clean the Docker Registry by removing untagged repositories https://github.com/ricardobranco777/clean_registry
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README.md

clean_registry

Clean the Docker Registry by removing untagged repositories and running the garbage collector in Docker Registry >= 2.4.0

The optional -x flag may be used to remove the specified repositories or tagged images.

WARNING:

Make backups of target docker-registry to avoid losing data.

This script stops the Registry container during cleanup to prevent corruption, making it temporarily unavailable to clients.

This script assumes the filesystem storage driver.

Running standalone

This script may be run as stand-alone (on local setups) or dockerized (which supports both local and remote Docker setups). To run stand-alone, the best is to run in virtualenv and install required packages via pip:

virtualenv --python=python3 .venv
. .venv/bin/activate
pip3 install --upgrade pip
pip3 install -r requirements.txt

You may need to execute above commands as privileged user to access docker service (sudo + activate virtualenv).

Usage

clean_registry.py [OPTIONS] CONTAINER [REPOSITORY[:TAG]]...
Options:
        -x, --remove    Remove the specified images or repositories.
        -q, --quiet     Suppress non-error messages.
        -V, --version   Show version and exit.

Docker usage with local Docker setup

docker run --rm --volumes-from CONTAINER -v /var/run/docker.sock:/var/run/docker.sock ricardobranco/clean_registry [OPTIONS] CONTAINER [REPOSITORY[:TAG]] ...

Docker usage with remote Docker setup

Make sure to read about remote Docker setup.

docker run --rm --volumes-from CONTAINER -e DOCKER_HOST -e DOCKER_TLS_VERIFY=1 -v /root/.docker:/root/.docker ricardobranco/clean_registry [OPTIONS] CONTAINER [REPOSITORY[:TAG]]...

Note:

Paths other than /root/.docker path may be specified with the DOCKER_CERT_PATH environment variable. In any case, your ~/.docker/*.pem files should be in the server to be able to run as a client against itself.