與git相似，docker也有自己的映象倉庫，官方倉庫網站是https://hub.docker.com/，其實我們平時docker pull xxx就是從該倉庫得到的映象（在不設定國內映象加速的情況下）。它和git倉庫很相似。

建立賬號

DockerHub：https://hub.docker.com/
很多人在這裡就出了問題，為什麼都填完了但是不能點註冊按鈕呢？因為該網站目前來說註冊是需要翻牆的，註冊成功後再關閉翻牆。

我重新上傳一個專案做示範，該映象是從hub上pull到的一個nginx映象，我把它上傳到我的公開倉庫。

上傳映象

先登入docker hub賬號。

docker login


[
 
[email protected] ~]# docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username (fantj): fantj
Password: 
Login Succeeded

[[email protected] ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
docker.io
 
/openjdk   8-jre               bef23b4b9cac        2 weeks ago         443 MB
docker.io/nginx     latest              ae513a47849c        4 weeks ago         109 MB
[[email protected] ~]# docker tag docker.io/nginx fantj/nginx
[[email protected] ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
docker.io
 
/openjdk   8-jre               bef23b4b9cac        2 weeks ago         443 MB
fantj/nginx         latest              ae513a47849c        4 weeks ago         109 MB
docker.io/nginx     latest              ae513a47849c        4 weeks ago         109 MB
[[email protected] ~]# docker push fantj/nginx
The push refers to a repository [docker.io/fantj/nginx]
7ab428981537: Mounted from library/nginx 
82b81d779f83: Mounted from library/nginx 
d626a8ad97a1: Mounted from library/nginx 
latest: digest: sha256:e4f0474a75c510f40b37b6b7dc2516241ffa8bde5a442bde3d372c9519c84d90 size: 948
[[email protected] ~]# 

流程大概是：登入->tag操作->push
注：tag 的第二個引數的字首是你的hub賬戶名

拉取映象

我先把伺服器上的映象刪除掉，然後再從hub中拉取映象。

# 刪除本地fantj/nginx映象
[[email protected] ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
docker.io/openjdk   8-jre               bef23b4b9cac        2 weeks ago         443 MB
fantj/nginx         latest              ae513a47849c        4 weeks ago         109 MB
docker.io/nginx     latest              ae513a47849c        4 weeks ago         109 MB
[[email protected] ~]# docker rmi fantj/nginx 
Untagged: fantj/nginx:latest
Untagged: fantj/[email protected]:e4f0474a75c510f40b37b6b7dc2516241ffa8bde5a442bde3d372c9519c84d90
[[email protected] ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
docker.io/openjdk   8-jre               bef23b4b9cac        2 weeks ago         443 MB
docker.io/nginx     latest              ae513a47849c        4 weeks ago         109 MB



# 從hub中拉取fantj/nginx映象
[[email protected] ~]# docker pull fantj/nginx
Using default tag: latest
Trying to pull repository docker.io/fantj/nginx ... 
latest: Pulling from docker.io/fantj/nginx
Digest: sha256:e4f0474a75c510f40b37b6b7dc2516241ffa8bde5a442bde3d372c9519c84d90
Status: Downloaded newer image for docker.io/fantj/nginx:latest
[[email protected] ~]# docker images
REPOSITORY              TAG                 IMAGE ID            CREATED             SIZE
docker.io/openjdk       8-jre               bef23b4b9cac        2 weeks ago         443 MB
docker.io/fantj/nginx   latest              ae513a47849c        4 weeks ago         109 MB
docker.io/nginx         latest              ae513a47849c        4 weeks ago         109 MB
[[email protected] ~]#