二、装上Docker瞧瞧（官网教程）

小咪咪 2023-01-11 13:29 82阅读 0赞

## 安装Docker ##

### （1）进入官网文档 ###

**官方文档：** [https://docs.docker.com/engine/install/centos/][https_docs.docker.com_engine_install_centos]

### （2）安装步骤 ###

#卸载旧版本
    yum remove docker \
                      docker-client \
                      docker-client-latest \
                      docker-common \
                      docker-latest \
                      docker-latest-logrotate \
                      docker-logrotate \
                      docker-engine
                      
    #安装镜像工具
    yum install -y yum-utils
    
    #配置docker镜像源
    yum-config-manager \
        --add-repo \
        https://download.docker.com/linux/centos/docker-ce.repo #官网默认镜像源，死慢
    
    yum-config-manager \
        --add-repo \
        http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo #阿里云镜像仓库（推荐）
        
    #加载镜像源
    yum clean all
    yum makecache
    
    #执行安装命令 ce社区版，cli客户端 containerd容器
    yum install docker-ce docker-ce-cli containerd.ioy -y
    
    #查看当前可安装版本
    yum list docker-ce --showduplicates | sort -r
    
    #安装指定版本命令
    yum install docker-ce-<VERSION_STRING> docker-ce-cli-<VERSION_STRING> containerd.io
    
    #启动docker
    systemctl start docker
    
    #测试docker
    docker run hello-world

> 先从本地仓库找，找不到再从官网镜像仓库中找

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjIzMDM0OA_size_16_color_FFFFFF_t_70_pic_center]

### （3）查看镜像 ###

#查看下载的镜像
    [root@cluster-node-5 ~]# docker images
    REPOSITORY    TAG       IMAGE ID       CREATED         SIZE
    hello-world   latest    bf756fb1ae65   12 months ago   13.3kB

### （4）卸载Docker ###

#卸载相关依赖
    yum remove docker-ce docker-ce-cli containerd.io
    
    #删除相关包（资源）
    rm -rf /var/lib/docker #docker默认工作路径

### （5）Docker执行流程 ###

> 以hello-world镜像为例

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjIzMDM0OA_size_16_color_FFFFFF_t_70_pic_center 1]

### （6）Docker底层原理 ###

> docker运行：server-client

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjIzMDM0OA_size_16_color_FFFFFF_t_70_pic_center 2]

[https_docs.docker.com_engine_install_centos]: https://docs.docker.com/engine/install/centos/
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