Docker学习--Docker仓库之Docker Hub的简单了解

墨蓝 2023-06-30 04:26 11阅读 0赞

Docker之所以能这么快的火起来，和Docker Hub的作用是分不开的。Docker构建了像GitHub一样的仓库，用来存放大家构建好的Docker镜像，其中已经包括了15000的镜像。大部分需求，都可以通过在Docker Hub中直接下载镜像来实现。

## 一、注册登录 ##

可以在`https://hub.docker.com`免费注册一个Docker Hub的账号，在命令行执行`docker login`，然后根据要求输入用户名和密码来完成登录Docker Hub。登录之后，如果想退出，可以通过`docker logout`来退出登录。

[root@docker ~]# 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: wangchao123
    Password: 
    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
    [root@docker ~]# docker logout
    Removing login credentials for https://index.docker.io/v1/

## 二、拉取镜像 ##

可以通过`docker search`命令来查找官方仓库中的镜像，并用`docker pull`命令来将它下载到本地。

#### 1、搜索镜像 ####

[root@docker ~]# docker search hello-world
    NAME                                       DESCRIPTION                                     STARS               OFFICIAL            AUTOMATED
    hello-world                                Hello World! (an example of minimal Dockeriz…   1094                [OK]                
    kitematic/hello-world-nginx                A light-weight nginx container that demonstr…   136                                     
    tutum/hello-world                          Image to test docker deployments. Has Apache…   65                                      [OK]
    dockercloud/hello-world                    Hello World!                                    17                                      [OK]
    crccheck/hello-world                       Hello World web server in under 2.5 MB          11                                      [OK]
    vad1mo/hello-world-rest                    A simple REST Service that echoes back all t…   3                                       [OK]
    ppc64le/hello-world                        Hello World! (an example of minimal Dockeriz…   2                                       
    ansibleplaybookbundle/hello-world-apb      An APB which deploys a sample Hello World! a…   1                                       [OK]
    carinamarina/hello-world-app               This is a sample Python web application, run…   1                                       [OK]
    markmnei/hello-world-java-docker           Hello-World-Java-docker                         1                                       [OK]
    ansibleplaybookbundle/hello-world-db-apb   An APB which deploys a sample Hello World! a…   1                                       [OK]
    souravpatnaik/hello-world-go               hello-world in Golang                           1                                       
    burdz/hello-world-k8s                      To provide a simple webserver that can have …   0                                       [OK]
    datawire/hello-world                       Hello World! Simple Hello World implementati…   0                                       [OK]
    koudaiii/hello-world                                                                       0                                       
    kevindockercompany/hello-world                                                             0                                       
    freddiedevops/hello-world-spring-boot                                                      0                                       
    businessgeeks00/hello-world-nodejs                                                         0                                       
    uniplaces/hello-world                                                                      0                                       
    nirmata/hello-world                                                                        0                                       [OK]
    infrastructureascode/hello-world           A tiny "Hello World" web server with a healt…   0                                       [OK]
    ansibleplaybookbundle/hello-world          Simple containerized application that tests …   0                                       
    s390x/hello-world                          Hello World! (an example of minimal Dockeriz…   0                                       
    stumacsolutions/hello-world-container                                                      0                                       
    mbrainar/hello-world                       Python-based hello-world web service            0

输出依次为镜像名字、描述、星级（表示该镜像的受欢迎程度）、是否官方创建、是否自动创建。OFFICIAL为OK就是官方镜像。

#### 2、拉取镜像 ####

[root@docker ~]# docker pull hello-world
    Using default tag: latest
    latest: Pulling from library/hello-world
    1b930d010525: Pull complete 
    Digest: sha256:4fe721ccc2e8dc7362278a29dc660d833570ec2682f4e4194f4ee23e415e1064
    Status: Downloaded newer image for hello-world:latest
    docker.io/library/hello-world:latest
    [root@docker ~]# docker images
    REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
    hello-world         latest              fce289e99eb9        12 months ago       1.84kB

## 三、推送镜像 ##

用户可以在登录成功后通过`docker push`命令来将自己的镜像推送到Docker Hub中。

修改本地镜像名字为Docker Hub账号名/镜像名

[root@docker ~]# docker tag hello-world wangchao123/hello-world:latest
    [root@docker ~]# docker images
    REPOSITORY                TAG                 IMAGE ID            CREATED             SIZE
    hello-world               latest              fce289e99eb9        12 months ago       1.84kB
    wangchao123/hello-world   latest              fce289e99eb9        12 months ago       1.84kB

上传镜像到公共仓库

[root@docker ~]# docker push wangchao123/hello-world:latest 
    The push refers to repository [docker.io/wangchao123/hello-world]
    af0b15c8625b: Mounted from library/hello-world 
    latest: digest: sha256:92c7f9c92844bbbb5d0a101b22f7c2a7949e40f8ea90c8b3bc396879d95e899a size: 524

上传成功之后，查看一下Docker Hub的页面

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3djMTY5NTA0MDg0Mg_size_16_color_FFFFFF_t_70]

好了，上传镜像到Docker Hub就是这么简单。

参考文章：  
[https://www.cnblogs.com/loveyous/p/11364289.html][https_www.cnblogs.com_loveyous_p_11364289.html]  
[http://k8s.unixhot.com/docker/docker-install.html][http_k8s.unixhot.com_docker_docker-install.html]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3djMTY5NTA0MDg0Mg_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200115103447939.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3djMTY5NTA0MDg0Mg==,size_16,color_FFFFFF,t_70
[https_www.cnblogs.com_loveyous_p_11364289.html]: https://www.cnblogs.com/loveyous/p/11364289.html
[http_k8s.unixhot.com_docker_docker-install.html]: http://k8s.unixhot.com/docker/docker-install.html