简介：
Harbor私有仓库运行一段时间后，仓库中存有大量镜像，会占用太多的存储空间。直接通过Harbor界面删除相关镜像，并不会自动删除存储中的文件和镜像。需要停止Harbor服务，执行垃圾回收命令，进行存储空间清理和回收。
相关资料：
1、Harbor用户手册中的相关说明：
Next, delete the actual files of the repository using the registry’s garbage collection(GC). Make sure that no one is pushing images or Harbor is not running at all before you perform a GC. If someone were pushing an image while GC is running, there is a risk that the image’s layers will be mistakenly deleted which results in a corrupted image. So before running GC, a preferred approach is to stop Harbor first.
Run the below commands on the host which Harbor is deployed on to preview what files/images will be affected:
#要启用垃圾回收（GC），首先要关闭Harbor服务，然后再执行清理命令
#停止Harbor相关服务
$ docker-compose stop
#使用–dry-run参数运行容器，预览运行效果，但不删除任何数据
$ docker run -it –name gc –rm –volumes-from registry vmware/registry:2.6.2-photon garbage-collect –dry-run /etc/registry/config.yml
#NOTE: The above option “–dry-run” will print the progress without removing any data.
Verify the result of the above test, then use the below commands to perform garbage collection and restart Harbor.
#不使用–dry-run参数，将删除相关的文件和镜像，
$ docker run -it --name gc --rm --volumes-from registry vmware/registry:2.6.2-photon garbage-collect /etc/registry/config.yml
#重新启动Harbor相关服务
$ docker-compose start
图1：01-先在Harbor UI图形界面中删除不需要的镜像
图2：02-停止Harbor服务，执行垃圾回收命令
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