下载脚本

curl https://raw.githubusercontent.com/burnettk/delete-docker-registry-image/master/delete_docker_registry_image.py | sudo tee /usr/local/bin/delete_docker_registry_image >/dev/null

chmod a+x /usr/local/bin/delete_docker_registry_image

配置环境变量

找到registry目录为blobs同级目录，例如：

[root@gitlab01 v2]# ls
blobs  repositories
[root@gitlab01 v2]# pwd
/opt/registry/docker/registry/v2

配置registry目录环境变量

export REGISTRY_DATA_DIR=/opt/registry/docker/registry/v2/

清理不用的docker镜像

delete_docker_registry_image --image mariadb:10.4