Docker上传镜像&拉取镜像

Docker官方镜像仓库网站：https://hub.docker.com/ ，其实我们平时docker pull xxx就是从该仓库得到的镜像（在不设置国内镜像加速的情况下）

创建账号

Docker Hub：https://hub.docker.com/

注：注册可能需要翻墙

以重新上传一个项目做示范，该镜像是从Docker Hub上pull到的一个nginx镜像，把它上传到自己的公开仓库

上传镜像

首先登录Docker Hub账号：

# 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 (yezhou): yezhou
Password: 
Login Succeeded

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

流程大概是：登录 -> tag操作 -> push
注：tag的第二个参数的前缀是Docker Hub账户名

拉取镜像

先将本地的镜像删除掉，然后再从Docker Hub中拉取镜像

# 删除本地yezhou/nginx镜像
# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
docker.io/openjdk   8-jre               bef23b4b9cac        2 weeks ago         443 MB
yezhou/nginx        latest              ae513a47849c        4 weeks ago         109 MB
docker.io/nginx     latest              ae513a47849c        4 weeks ago         109 MB
# docker rmi yezhou/nginx 
Untagged: yezhou/nginx:latest
Untagged: yezhou/nginx@sha256:e4f0474a75c510f40b37b6b7dc2516241ffa8bde5a442bde3d372c9519c84d90
# 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

# 从Docker Hub中拉取yezhou/nginx镜像
# docker pull yezhou/nginx
Using default tag: latest
Trying to pull repository docker.io/yezhou/nginx ... 
latest: Pulling from docker.io/yezhou/nginx
Digest: sha256:e4f0474a75c510f40b37b6b7dc2516241ffa8bde5a442bde3d372c9519c84d90
Status: Downloaded newer image for docker.io/yezhou/nginx:latest
# docker images
REPOSITORY              TAG                 IMAGE ID            CREATED             SIZE
docker.io/openjdk       8-jre               bef23b4b9cac        2 weeks ago         443 MB
docker.io/yezhou/nginx  latest              ae513a47849c        4 weeks ago         109 MB
docker.io/nginx         latest              ae513a47849c        4 weeks ago         109 MB