CentOS如何安装docker
<p>1、做基础准备，停止centos默认的防火墙，并禁止它开机启动，命令如下：</p><p><span style="color: rgba(255, 0, 0, 1)"><strong>systemctl stop firewalld</strong></span></p>
<p><span style="color: rgba(255, 0, 0, 1)"><strong>systemctl disable firewalld</strong></span></p>
<p><img alt="" class="medium-zoom-image lazyload" loading="lazy" src="https://img2022.cnblogs.com/blog/2662710/202205/2662710-20220522220141011-557480885.png"></p>
<p> </p>
<p>2、<span style="color: rgba(255, 0, 0, 1)">cat /etc/selinux/config</span>，如果SELINUX不是等于disabled，用vi把config文件里面的改成SELINUX=disabled （在该行输入i，进入编辑模式，编辑完成后，按esc回到命令模式，按:wq）</p>
<p><img alt="" class="medium-zoom-image lazyload" loading="lazy" src="https://img2022.cnblogs.com/blog/2662710/202205/2662710-20220522220321835-706418013.png"></p>
<p> </p>
<p> 3、重启虚拟机</p>
<p>4、安装docker：</p>
<p> 第一步：安装所需的工具包，也就是依赖包（3个），命令：</p>
<p><span style="color: rgba(255, 0, 0, 1)">yum -y install yum-utils</span></p>
<p><span style="color: rgba(255, 0, 0, 1)">yum -y install device-mapper-persistent-data</span></p>
<p><span style="color: rgba(255, 0, 0, 1)">yum -y install lvm2</span></p>
<p>报错如下：</p>
<p><img alt="" class="medium-zoom-image lazyload" loading="lazy" src="https://img2022.cnblogs.com/blog/2662710/202205/2662710-20220522220835947-307625643.png"></p>
<p> </p>
<p> 接着下载阿里云镜像文件</p>
<p><span style="color: rgba(255, 0, 0, 1)">wget -O /CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo</span></p>
<p><img alt="" class="medium-zoom-image lazyload" loading="lazy" src="https://img2022.cnblogs.com/blog/2662710/202205/2662710-20220522221752435-1472343401.png"></p>
<p> </p>
<p> 下载好之后，最好清理一下软件源</p>
<p><span style="color: rgba(255, 0, 0, 1)">yum clean all</span></p>
<p>然后去下载工具包</p>
<p><img alt="" class="medium-zoom-image lazyload" loading="lazy" src="https://img2022.cnblogs.com/blog/2662710/202205/2662710-20220522222316553-1943281540.png"></p>
<p> </p>
<p> 第二步：配置docker的安装源，只有正确配置docker安装源才能安装最新版本</p>
<p><span style="color: rgba(255, 0, 0, 1)">yum-config-manager \ --add-repo \ https://download.docker.com/linux/centos/docker-ce.repo</span></p>
<p>第三步：安装docker，命令</p>
<p><span style="color: rgba(255, 0, 0, 1)">yum -y install docker</span></p>
<p>最后验证一下,启动后才能查看相应信息：</p>
<p><span style="color: rgba(51, 153, 102, 1)">启动docker: systemctl start docker</span></p>
<p><span style="color: rgba(51, 153, 102, 1)">查看docker版本号： docker --version</span></p>
<p><span style="color: rgba(51, 153, 102, 1)">查看docker的信息： docker info</span></p>
<p><span style="color: rgba(51, 153, 102, 1)">验证docker安装： docker run hello-word</span></p>
<p><span style="color: rgba(51, 153, 102, 1)">开机启动docker： systemctl enable docker</span></p>
<p><span style="color: rgba(51, 153, 102, 1)">创建容器： docker run -it nginx(镜像名) （执行后，docker会从服务器上下载镜像，并创建一个容器），该命令等同于先执行docker create命令，然后再执行docker start命令</span></p>
<p><span style="color: rgba(51, 153, 102, 1)">查看运行的容器： docker ps</span></p>
<p><span style="color: rgba(51, 153, 102, 1)">查看容器IP： docker inspect 容器ID（注：容器ID可以通过上条命令查看到ID）</span></p>
<p><span style="color: rgba(51, 153, 102, 1)">访问容器： curl 容器IP</span></p>
<p><span style="color: rgba(51, 153, 102, 1)">进入容器： docker exec -it 容器IP或ID</span></p>
<p>验证一下：</p>
<p><img alt="" class="medium-zoom-image lazyload" loading="lazy" src="https://img2022.cnblogs.com/blog/2662710/202205/2662710-20220522223356168-2100677147.png"></p>
<p> </p>
<p> 安装成功。</p><br><br>
来源：https://www.cnblogs.com/hyqbk/p/16299413.html
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