docker私有仓库v2版本中的镜像，官方不建议删除，但是也提供了删除接口：
DELETE /v2/<name>/manifests/<reference> Host: <registry host> Authorization: <scheme> <token>
删除的原理就是把索引删掉，但磁盘上的数据是删不掉的。这是由于各个镜像之间的不同层共用的关系，可能导致删除一个镜像后其余的镜像也无法使用了。
用python实现伪删除，代码如下：
#-*- coding:utf-8 -*-
#!/usr/bin/env python
'''
Created on 2016.10.8
@desc: delete p_w_picpaths from repo
'''
import requests
repo_ip = "172.16.4.254"
repo_port = 5000
p_w_picpath_name = "oa"
p_w_picpath_tag = "20161012"
def deleteImagesFromRepo(repo_ip,repo_port,p_w_picpath_name,p_w_picpath_tag):
head = {'Accept': 'application/vnd.docker.distribution.manifest.v2+json'}
reg = "http://" + repo_ip + ":" + str(repo_port) + "/v2/"
res = requests.get(reg + p_w_picpath_name + "/manifests/" + p_w_picpath_tag,headers=head,verify=False)
manifest = res.headers['Docker-Content-Digest']
res2 = requests.delete(reg + p_w_picpath_name + "/manifests/"+manifest,verify=False)
if res2.status_code == 202:
print "delete %s success......"%(p_w_picpath_name+':'+p_w_picpath_tag)
else:
print "delete %s fail......"%(p_w_picpath_name+':'+p_w_picpath_tag)
deleteImagesFromRepo(repo_ip,repo_port,p_w_picpath_name,p_w_picpath_tag)运行结果如下：
参考：
http://blog.decbug.com/2016/07/21/del_restore_docker_p_w_picpath/
