DockerRegistry

# DockerRegistry
## 如何清理Registry
`https://blog.csdn.net/l6807718/article/details/52886546`

registry:2.5.0版本的镜像，将镜像默认存放在了/var/lib/registry 目录下

/var/lib/registry/docker/registry/v2/repositories/ 目录下会有几个文件夹，命名是已经上传了的镜像的名称。

如果需要删除已经上传的镜像，现有两种方法

### 一.官方推荐清理方式
1. 更改registry容器内/etc/docker/registry/config.yml文件
```
storage:
  delete:
    enabled: true
```
2. 找出你想要的镜像名称的tag
```
curl -I -X GET <protocol>://<registry_host>/v2/<镜像名>/tags/list
```
3. 拿到digest_hash参数
```
curl  --header "Accept: application/vnd.docker.distribution.manifest.v2+json" -I -X GET http://<仓库地址>/v2/<镜像名>/manifests/<tag>
```
如：
```
$ curl  --header "Accept: application/vnd.docker.distribution.manifest.v2+json" -I -X GET http://10.109.252.221:5000/v2/wordpress/manifests/latest
```
4. 复制digest_hash
```
Docker-Content-Digest: <digest_hash>
```
5. 删除清单
```
curl -I -X DELETE <protocol>://<registry_host>/v2/<repo_name>/manifests/<digest_hash>
```
如：
```
curl -I -X DELETE http://10.109.252.221:5000/v2/wordpress/manifests/sha256:b3a15ef1a1fffb8066d0f0f6d259dc7f646367c0432e3a90062b6064f874f57c
```
6. 删除文件系统内的镜像文件，注意2.4版本以上的registry才有此功能
```
docker exec -it <registry_container_id> bin/registry garbage-collect <path_to_registry_config>
```
如：
```
docker exec registry bin/registry garbage-collect /etc/docker/registry/config.yml
```

### 二.简易版
1.打开镜像的存储目录，如有-V操作打开挂载目录也可以，删除镜像文件夹
```
docker exec <容器名> rm -rf /var/lib/registry/docker/registry/v2/repositories/<镜像名>
```
2.执行垃圾回收操作，注意2.4版本以上的registry才有此功能
```
docker exec registry bin/registry garbage-collect /etc/docker/registry/config.yml
```

重启

### 使用自签证书
https://docs.docker.com/registry/insecure/#use-self-signed-certificates

### 使用s3作为后端存储
https://github.com/docker/docs/blob/main/registry/storage-drivers/s3.md