[root@izuf63c0r3hzuj2ddt2gqvz ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
runnable_es         latest              6d5c7011f371        2 months ago        536MB
mysql               latest              b8fd9553f1f0        4 months ago        445MB
mq-1                latest              ee6f767c783f        7 months ago        250MB
tomcat              latest              3639174793ba        7 months ago        463MB
rabbitmq            latest              6d385fe2de66        7 months ago        164MB
nginx               latest              53f3fd8007f7        8 months ago        109MB
redis               latest              a55fbf438dfd        9 months ago        95MB
elasticsearch       latest              5acf0e8da90b        15 months ago       486MB
[root@izuf63c0r3hzuj2ddt2gqvz ~]# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                               NAMES
00229456f72e        mysql               "docker-entrypoint.s"   About an hour ago   Up About an hour    0.0.0.0:3306->3306/tcp, 33060/tcp   blog-mysql
[root@izuf63c0r3hzuj2ddt2gqvz ~]# docker commit -a 'dockhapi' -m 'init mysql' 00229456f72e dockhapi/mysql:v1.0
sha256:81c858adc2d826919dd3c9968a6749a83d3ba2cb8ac993ea706fa83a83a2c67d
[root@izuf63c0r3hzuj2ddt2gqvz ~]# docker tag dockhapi/mysql:v1.0 dockhapi/mysqls
[root@izuf63c0r3hzuj2ddt2gqvz ~]# docker push dockhapi/mysql:v1.0
The push refers to repository [docker.io/dockhapi/mysql]
a4065e17f028: Pushed 
1cfb4d403fde: Pushed 
e47b5971b1f1: Pushed 
9ac6573d19b0: Pushed 
3cd5c95dfa08: Pushed 
05f26d9a462a: Pushed 
9e88946b01ba: Pushed 
7acae26d323c: Pushed 
9a341d74c9b2: Pushed 
5547ac6d39e8: Pushed 
683d7a4130fe: Pushed 
7288a4c980c6: Pushed 
e9dc98463cd6: Pushed 
v1.0: digest: sha256:7ab38983f58c3048978e8c3becf51c95ba9bedbe0ccc246e01b0a30051f9cea4 size: 3035

上述是我在运行中的mysql容器拍摄快照后推上dockerhub的过程。

步骤

登录（https://hub.docker.com）

docker login docker.io

然后提示输入username和密码

拍摄快照

docker commit -a 'dockerhub username' -m 'commit message'  '运行中的docker的Container Id'  '快照名称'

打标签

docker tag '快照名称[:version]'  'dockerhub username'/repository

提交镜像

docker push '快照名'

最后既可以在dockerhub上看到了：

右边提示：docker pull dockhapi/mysql:v1.0即可拉取镜像。不用怕机器关机后失去所创建的表和数据了!(私有库，未登录pull不下来哦！)