（1）在dockerhub网站注册一个账号，如账号为redrose2100

（2）编写DockerFile文件，如下：

FROM centos
MAINTAINER redrose2100<hitredrose@163.com>
ENV JAVA_HOME /usr/local/jdk_1.8/
WORKDIR /usr/local
RUN yum install -y vim
RUN yum install -y net-tools
EXPOSE 80
CMD echo $JAVA_HOME
CMD echo "---end---"
CMD /bin/bash

（3）在本地制作一个镜像

docker build -f Dockerfile -t mycentos:0.0.1 .

查看制作好的镜像如下

[root@iZbp1flzt6x7pxmxfhmxeeZ opt]# docker images
REPOSITORY   TAG       IMAGE ID       CREATED         SIZE
mycentos     0.0.1     71f621e7c514   6 seconds ago   337MB
nginx        latest    f8f4ffc8092c   4 weeks ago     133MB
mysql        5.7       9f35042c6a98   4 weeks ago     448MB
centos       latest    5d0da3dc9764   6 weeks ago     231MB
[root@iZbp1flzt6x7pxmxfhmxeeZ opt]#

（4）修改tag标签

docker tag mycentos:0.0.1 redrose2100/mycentos:0.0.1

修改后查看镜像如下：

[root@iZbp1flzt6x7pxmxfhmxeeZ opt]# docker images
REPOSITORY             TAG       IMAGE ID       CREATED              SIZE
mycentos               0.0.1     71f621e7c514   About a minute ago   337MB
redrose2100/mycentos   0.0.1     71f621e7c514   About a minute ago   337MB
nginx                  latest    f8f4ffc8092c   4 weeks ago          133MB
mysql                  5.7       9f35042c6a98   4 weeks ago          448MB
centos                 latest    5d0da3dc9764   6 weeks ago          231MB
[root@iZbp1flzt6x7pxmxfhmxeeZ opt]#

（5）使用命令登录dockerhub

如下，表示登录成功

[root@iZbp1flzt6x7pxmxfhmxeeZ opt]# docker login -u redrose2100
Password:
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store
Login Succeeded
[root@iZbp1flzt6x7pxmxfhmxeeZ opt]#

（6）发布镜像到dockerhub

[root@iZbp1flzt6x7pxmxfhmxeeZ opt]# docker push redrose2100/mycentos:0.0.1
The push refers to repository [docker.io/redrose2100/mycentos]
68bb0580af37: Pushed
8b0aa4b538f7: Pushed
74ddd0ec08fa: Mounted from library/centos
0.0.1: digest: sha256:a1caf62a2405e0c0020ce66b64bc0cafc06c46471318d118a086221abb50b073 size: 953
[root@iZbp1flzt6x7pxmxfhmxeeZ opt]#

（7）登录dockerhub，可以看到已经上传上去了