🏆【CI/CD技术专题】「Docker实战系列」（1）本地进行生成镜像以及标签Tag推送到DockerHub

背景介绍

Docker镜像构建成功后，只要有docker环境就可以使用，但必须将镜像推送到Docker Hub上去。创建的镜像最好要符合Docker Hub的tag要求，因为在Docker Hub注册的用户名是liboware，最后利用docker push命令推送镜像到公共仓库。

前提概要

你需要在Docker hub注册用户：到官网注册账号：https://hub.docker.com/

例如：注册账号名称：liboware

在本地服务器登录docker：

例如在CentOS7服务器

[root@localhost ~]#  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: liboware   ##输入账号
Password:          ##输入密码
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

查看镜像

[root@localhost ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
nacos               v1         9e5f6711d527        3 days ago          178MB
mysql               v1                  9e5f6711d527        3 days ago          178MB

docker tag建立镜像

[root@localhost ~]# docker tag nacos:v1 liboware/nacos:v1

docker images 查看镜像

[root@localhost ~]# docker images 
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
nacos               v1         9e5f6711d527        3 days ago          178MB
nginx               v1                  9e5f6711d527        3 days ago          178MB
liboware/mysql     v1                  9e5f6711d527        3 days ago          178MB
[root@localhost ~]# 

docker hub推送镜像

docker push 注册docker用户名/REPOSITORY:TAG

[root@localhost ~]# docker push liboware/nacos:v1
The push refers to repository [docker.io/llxxyy/nginx-io]
833a0f6a6ff9: Pushed 
10bfe402500e: Pushed 
d43641d7d594: Mounted from library/nginx 
c2adabaecedb: Mounted from library/nginx 
v1: digest: sha256:67dcdae5578c0374019cc899731543cfd7c48fe5780e84233a258f2bf7d2ceda size: 1155
[root@localhost ~]# 

注：推送Docker Hub速度很慢，耐心等待，很有可能失败，失败会尝试多次重传，之后断开推送（但已推送上去的会保留，保留时间不知道是多久）。

hub docker效果

Docker 使用发布的镜像

docker@default:~$ docker search liboware/nacos
NAME                               DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED  
liboware/nacos   In this  image server you can use ma...   0 

在pull下来

[root@localhost ~]# docker pull liboware/nacos:v1
v1: Pulling from liboware/nacos
Digest: sha256:67dcdae5578c0374019cc899731543cfd7c48fe5780e84233a258f2bf7d2ceda
Status: Downloaded newer image for liboware/nacos:v1
docker.io/liboware/nacos:v2

确认pull成功

[root@localhost ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
nginx               stable-perl         9e5f6711d527        3 days ago          178MB
nginx               v1                  9e5f6711d527        3 days ago          178MB
libo/nacos     v1                  9e5f6711d527        3 days ago          178MB

遇到的问题

1. 执行：docker push nacos:v1【提示denied: requested access to the resource is denied】

2. 我们可以列出所有镜像：docker images

3. 建立tag将要发布的镜像改到自己账户名下，我的账户名：liboware

docker tag nacos:v2  liboware/nacos:v2

4. 再次推送：docker push liboware/nacos:v2【成功】