知识基础：ubuntu系统安装，docker安装，了解docker的基础知识
下载镜像（如果下载2版本以上的需要配置ssl证书，这里先用0.9.1的演示）
root@ubuntu:/# docker pull registry:0.9.1
root@ubuntu:/# docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
registry 0.9.1 bdc26a966725 4 weeks ago 422.9 MB
csphere/ent 0.1 f9118a2c0edc 3 weeks ago 212.1 MB
root@ubuntu:/#
生成容器(用编程的术语说：将镜像实例化出一个容器)
端口号用5000，名称：registry 镜像文件和版本号：registry:0.9.1
root@ubuntu:/# docker run -d -v /opt/registry:/var/lib/registry -p 5000:5000 --restart=always --name registry registry:0.9.1
查看有哪些容器
root@ubuntu:/# docker ps –a
root@ubuntu:/# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
9416c29b3cfd registry:0.9.1 "docker-registry" 45 minutes ago Up 14 minutes 0.0.0.0:5000->5000/tcp registry
root@ubuntu:/#
跳过，如果需要可删除没用的容器
root@ubuntu:/# docker rm –f 容器ID
用浏览器访问以下地址会出现一个弹出的下载窗口，证明私有仓库已安装好，后面是测试和修改配置步骤
http://172.16.160.32:5000
root@ubuntu:/# docker tag csphere/ent:0.1 172.16.160.32:5000/csphere/ent:0.1
修改docker的配置，不然push的时候会报错。
root@ubuntu:/# vi /etc/default/docker
添加以下内容到配置文件中：
DOCKER_OPTS="$DOCKER_OPTS --insecure-registry=172.16.160.32:5000"
上传镜像到私有仓库
root@ubuntu:/# docker push 172.16.160.32:5000/csphere/ent
The push refers to a repository [172.16.160.32:5000/csphere/ent] (len: 1)
Sending image list
Pushing repository 172.16.160.32:5000/csphere/ent (1 tags)
f1b10cd84249: Image successfully pushed
172633e38420: Image successfully pushed
fab4b1df8eb1: Image successfully pushed
f9118a2c0edc: Image successfully pushed
Pushing tag for rev [f9118a2c0edc] on {http://172.16.160.32:5000/v1/repositories/csphere/ent/tags/0.1}
root@ubuntu:/#
查询私有仓库内的镜像
root@ubuntu:/#curl http://172.16.160.32:5000/v1/search
{"num_results": 1, "query": "", "results": [{"description": "", "name": "csphere/ent"}]}
root@ubuntu:/#
root@ubuntu:/# docker rmi 172.16.160.32:5000/csphere/ent:0.1
Untagged: 172.16.160.32:5000/csphere/ent:0.1
Deleted: f9118a2c0edcf4782c8100d29fafde29dfc3e16aa4c17f648bd9ef03f9b4a6a0
root@ubuntu:/#
下载前确认已经没有csphere/ent镜像文件
root@ubuntu:/# docker images
以下命令从172.16.160.32:5000上的csphere目录下下载版本号为0.1的ent镜像。
注：要指定IP地址不然会从公网上下载镜像，要指定版本，不然会提示找不到相应镜像。
root@ubuntu:/# docker pull 172.16.160.32:5000/csphere/ent:0.1
Pulling repository 172.16.160.32:5000/csphere/ent
f9118a2c0edc: Download complete
f1b10cd84249: Download complete
172633e38420: Download complete
fab4b1df8eb1: Download complete
Status: Downloaded newer image for 172.16.160.32:5000/csphere/ent:0.1
root@ubuntu:/#
下载后确认有csphere/ent镜像文件
root@ubuntu:/# docker images
错误示范：
root@ubuntu:/# docker pull 172.16.160.32:5000/csphere/ent
Pulling repository 172.16.160.32:5000/csphere/ent
FATA[0004] Tag latest not found in repository 172.16.160.32:5000/csphere/ent
root@ubuntu:/# curl http://172.16.160.32:5000/v1/search
{"num_results": 1, "query": "", "results": [{"description": "", "name": "csphere/ent"}]}root@ubuntu:/#
root@ubuntu:/# docker pull csphere/ent
Pulling repository csphere/ent
FATA[0020] Error: image csphere/ent:latest not found
root@ubuntu:/# docker pull csphere/ent:0.1
Pulling repository csphere/ent
FATA[0013] Error: image csphere/ent:0.1 not found