将镜像推送到Docker Hub

上面的两个小节制作了基础镜像，也使用Dockerfile文件制作了我们需要的镜像，我们可以把自己制作的镜像推送到Docker Hub上，这样就可以直接使用docker pull命令在任意一台主机上pull下来，当然这是一个公共的仓库，别人也可以使用同样的命令下载，如果使用私有的仓库，需要购买。

向Docker Hub上推送必须要在该网站上进行注册，在需要推送的机器上使用下面的命令进行登录。Docker login进行登录：

[root@10-10-63-106 ~]# docker login
Username: frank
Password:
Email: [e-mail]
Login Succeeded

登录的认证信息存放在.dockercfg

[root@10-10-63-106 ~]# cat .dockercfg

{"":{"auth":"ZnJhbmt6Zno6NjY0MzUwMTE=","email":"[e-mail]"}}

推送到Docker Hub上的镜像必须按照下面的格式进行：/,使用docker images命令查看本地的docker镜像，如果当初命名的镜像名字不是按照上面的规则进行的，则可以使用docker tag 添加添加自己的名字。

[root@10-10-63-106 ~]# docker images
REPOSITORY          TAG          IMAGE ID      CREATED         VIRTUAL SIZE
frankzfz/complie-kernel   v1      d157772a9d3c      9 days ago          1.747 GB
centos6.3-base        latest      a8fe6b2d8f23      9 days ago          724.6 MB
 [root@10-10-63-106 ~]# docker tag centos6.3-base frankzfz/centos6.3-base
[root@10-10-63-106 ~]# docker  images
REPOSITORY         TAG       IMAGE ID          CREATED          VIRTUAL SIZE
frankzfz/complie-kernel   v1       d157772a9d3c        9 days ago        1.747 GB
centos6.3-base        latest      a8fe6b2d8f23        9 days ago        724.6 MB
frankzfz/centos6.3-base   latest    a8fe6b2d8f23        9 days ago        724.6 MB

使用docker push进行推送，如果推送成功后，可以看到下面的信息

[root@10-10-63-106 ~]# docker push frankzfz/centos6.3-base:latest
The push refers to a repository [frankzfz/centos6.3-base] (len: 1)
Sending image list
Pushing repository frankzfz/centos6.3-base (1 tags)
a8fe6b2d8f23: Image already pushed, skipping
Pushing tag for rev [a8fe6b2d8f23] on {https://cdn-registry-1.docker.io/v1/repositories/frankzfz/centos6.3-base/tags/latest}

在Docker Hub上也可以看到自己的推送的tag

 上面把基础镜像推送到Docker Hub上，如果是使用Dockerfile进行build的images也可以使用同样的方法进行推送，但是在推送之前必须把使用该镜像的容器stop，然后才能推送成功，一开始没有停止容器，始终不能成功的把镜像推送到Docker Hub上

docker push frankzfz/complie-kernel:v1
The push refers to a repository [frankzfz/complie-kernel] (len: 1)
Sending image list
Pushing repository frankzfz/complie-kernel (1 tags)
a8fe6b2d8f23: Image already pushed, skipping
3317841922a1: Image already pushed, skipping
1922df6f140f: Pushing [==================================================>] 652.8 MB/652.8 MB
2015/03/11 19:50:38

但是也并没有提示任何的错误信息，推送成功后的正确信息如下：

[root@10-10-63-106 ~]# docker push frankzfz/complie-kernel:v1
The push refers to a repository [frankzfz/complie-kernel] (len: 1)
Sending image list
Pushing repository frankzfz/complie-kernel (1 tags)
a8fe6b2d8f23: Image already pushed, skipping
3317841922a1: Image already pushed, skipping
1922df6f140f: Image successfully pushed
fb9bd8bb39d0: Image successfully pushed
b4657c91837b: Image successfully pushed
ac088768389c: Image successfully pushed
4cecba576ec9: Image successfully pushed
2bba67df2882: Image successfully pushed
5c664d95439d: Image successfully pushed
a6c6c1776843: Image successfully pushed
71c24758ec01: Image successfully pushed
b1e1803ae471: Image successfully pushed
05ef73a94126: Image successfully pushed
3239ca21052e: Image successfully pushed
40661c45e523: Image successfully pushed
d157772a9d3c: Image successfully pushed
Pushing tag for rev [d157772a9d3c] on {https://cdn-registry-1.docker.io/v1/repositories/frankzfz/complie-kernel/tags/v1}