🏆【CI/CD技術專題】「Docker實戰系列」（1）本地進行生成鏡像以及標籤Tag推送到DockerHub

背景介紹

Docker鏡像構建成功後，只要有docker環境就可以使用，但必須將鏡像推送到Docker Hub上去。創建的鏡像最好要符合Docker Hub的tag要求，因爲在Docker Hub註冊的用戶名是liboware，最後利用docker push命令推送鏡像到公共倉庫。

前提概要

你需要在Docker hub註冊用戶：到官網註冊賬號：https://hub.docker.com/

例如：註冊賬號名稱：liboware

在本地服務器登錄docker：

例如在CentOS7服務器

[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   ##輸入賬號
Password:          ##輸入密碼
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

查看鏡像

[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建立鏡像

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

docker images 查看鏡像

[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推送鏡像

docker push 註冊docker用戶名/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，很有可能失敗，失敗會嘗試多次重傳，之後斷開推送（但已推送上去的會保留，保留時間不知道是多久）。

hub docker效果

Docker 使用發佈的鏡像

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

在pull下來

[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

確認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

遇到的問題

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

2. 我們可以列出所有鏡像：docker images

3. 建立tag將要發佈的鏡像改到自己賬戶名下，我的賬戶名：liboware

docker tag nacos:v2  liboware/nacos:v2

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