删除本地 Registry 中的 docker 镜像

来源：靑龍一笑的博客作者：靑龍一笑发布时间：2021-04-13 13:42:15 点击量：687 评论：0

默认是不允许删除本地 Registry 中的镜像。

1、查看镜像列表

[root@docker-registry ~]# curl http://docker-registry:5000/v2/_catalog
{"repositories":["centos"]}

2、查看 registry 容器 ID

[root@docker-registry ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
f771472056b1 registry "/entrypoint.sh /etc…" 7 hours ago Up 14 minutes 0.0.0.0:5000->5000/tcp confident_spence

3、查看配置文件

[root@docker-registry ~]# docker exec -it f771472056b1 cat /etc/docker/registry/config.yml
version: 0.1
log:
fields:
service: registry
storage:
cache:
blobdescriptor: inmemory
filesystem:
rootdirectory: /var/lib/registry
http:
addr: :5000
headers:
X-Content-Type-Options: [nosniff]
health:
storagedriver:
enabled: true
interval: 10s
threshold: 3

4、修改配置文件

[root@docker-registry ~]# docker exec -it f771472056b1 vi /etc/docker/registry/config.yml

增加 delete 段，将 enabled 设置为 true，内容如下：

version: 0.1
log:
fields:
service: registry
storage:
cache:
blobdescriptor: inmemory
filesystem:
rootdirectory: /var/lib/registry
delete:
enabled: true
http:
addr: :5000
headers:
X-Content-Type-Options: [nosniff]
health:
storagedriver:
enabled: true
interval: 10s
threshold: 3

5、重启容器，使配置生效

[root@docker-registry ~]# docker restart f771472056b1

6、获取镜像的摘要信息

[root@docker-registry ~]# curl --header "Accept: application/vnd.docker.distribution.manifest.v2+json" -I -X GET http://docker-registry:5000/v2/centos/manifests/7
HTTP/1.1 200 OK
Content-Length: 529
Content-Type: application/vnd.docker.distribution.manifest.v2+json
Docker-Content-Digest: sha256:e4ca2ed0202e76be184e75fb26d14bf974193579039d5573fb2348664deef76e
Docker-Distribution-Api-Version: registry/2.0
Etag: "sha256:e4ca2ed0202e76be184e75fb26d14bf974193579039d5573fb2348664deef76e"
X-Content-Type-Options: nosniff
Date: Sat, 10 Apr 2021 14:29:04 GMT

7、删除镜像

[root@docker-registry ~]# curl -I -X DELETE http://docker-registry:5000/v2/centos/manifests/sha256:e4ca2ed0202e76be184e75fb26d14bf974193579039d5573fb2348664deef76e
HTTP/1.1 202 Accepted
Docker-Distribution-Api-Version: registry/2.0
X-Content-Type-Options: nosniff
Date: Sat, 10 Apr 2021 14:34:34 GMT
Content-Length: 0

8、验证镜像是否被删除

（1）方法一

[root@docker-registry ~]# curl --header "Accept: application/vnd.docker.distribution.manifest.v2+json" -I -X GET http://docker-registry:5000/v2/centos/manifests/7
HTTP/1.1 404 Not Found
Content-Type: application/json; charset=utf-8
Docker-Distribution-Api-Version: registry/2.0
X-Content-Type-Options: nosniff
Date: Sat, 10 Apr 2021 14:36:30 GMT
Content-Length: 91

（2）方法二

[root@docker-client ~]# docker pull docker-registry:5000/centos:7
Error response from daemon: manifest for docker-registry:5000/centos:7 not found: manifest unknown: manifest unknown