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前言

之前通过docker搭建过jenkins+python3环境，如果想要在不同的机器上搭建一样的环境，就可以将之前搭建的镜像上传到镜像仓库，这样方便在不同的机器上快速搭建同一套环境。
如果公开的话，别人也可以用你的镜像快速搭建环境，类似于 GitHub 本地代码上传到代码仓库，再从仓库拉取代码到本地。

新建镜像仓库

去docker官网https://hub.docker.com/注册个账号，新建仓库即可
操作过程类似github，这里就不再详解了
创建成功后，右侧会提示使用docker push推送

docker push ******/centos_jenkins:tagname

docker 上传本地镜像_不同docker仓库镜像同步

打本地标签tag

在上传之前，先给本地镜像打个tag标签，相当于重新复制镜像并重命名为docker账户名/仓库名称

docker tag 本地镜像:tag docker账号/docker仓库:tag

➜  ~ docker tag jenkins/jenkins:lts ******/centos_jenkins
➜  ~ docker images                                           
REPOSITORY                  TAG       IMAGE ID       CREATED       SIZE
jenkins/jenkins             lts       e5599f396096   12 days ago   717MB
******/centos_jenkins   latest    e5599f396096   12 days ago   717MB

push 上传本地镜像

先使用命令docker login登陆docker hub账号

➜  ~ docker login 
Authenticating with existing credentials...
Login Succeeded

上传本地镜像标签到镜像仓库，使用docker指令

docker push docker 账号/仓库名称:tagname

➜  ~ docker push s649821022/centos_jenkins                            
Using default tag: latest
The push refers to repository [docker.io/*******/centos_jenkins]
b46a62d52dda: Mounted from jenkins/jenkins 
4e0be38f7490: Mounted from jenkins/jenkins 
0cd072c0ce42: Mounted from jenkins/jenkins 
43fcd918f136: Mounted from jenkins/jenkins 
21f11e7c3a56: Mounted from jenkins/jenkins 
eb36f7433291: Mounted from jenkins/jenkins 
518a16e913d2: Mounted from jenkins/jenkins 
b25fdacd2517: Mounted from jenkins/jenkins 
bf63a4d81a68: Mounted from jenkins/jenkins 
04ca868b414a: Mounted from jenkins/jenkins 
7bbef5c83873: Mounted from jenkins/jenkins 
21d861a860f6: Mounted from jenkins/jenkins 
ae2a8013d5a5: Mounted from jenkins/jenkins 
d81d8fa6dfd4: Mounted from jenkins/jenkins 
bd76253da83a: Mounted from jenkins/jenkins 
e43c0c41b833: Mounted from jenkins/jenkins 
01727b1a72df: Pushed 
69dfa7bd7a92: Mounted from jenkins/jenkins 
4d1ab3827f6b: Mounted from jenkins/jenkins 
7948c3e5790c: Mounted from jenkins/jenkins 
latest: digest: sha256:63fde6791bc9e11dc8fc94830ac76228afbe8d31206ab8f83f251314a3f45ba9 size: 4509

上传完成后打开自己的docker hub账号，查看镜像仓库
docker 上传本地镜像_不同docker仓库镜像同步