<div style="box-sizing: border-box; font-family: 'Microsoft Yahei', Helvetica, Arial, sans-serif; font-size: 14pt; color: white; background-color: black; border-left: 10px solid red; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;"><strong style="box-sizing: border-box;">什么是Docker？</strong></div> <p style="box-sizing: border-box; margin-bottom: 10px; line-height: 23px; text-indent: 1em; text-align: justify; color: #3d4450; font-family: 'Microsoft Yahei', Helvetica, Arial, sans-serif; font-size: 12px; background-color: #ffffff;">Docker是一个开源项目，它允许在容器内部创建和分发应用程序，容器是可以独立于主机系统轻松复制的标准化环境。</p> <div style="box-sizing: border-box; font-family: 'Microsoft Yahei', Helvetica, Arial, sans-serif; font-size: 14pt; color: white; background-color: black; border-left: 10px solid red; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;"><strong style="box-sizing: border-box;">添加Docker存储库</strong></div> <p style="box-sizing: border-box; margin-bottom: 10px; line-height: 23px; text-indent: 1em; text-align: justify; color: #3d4450; font-family: 'Microsoft Yahei', Helvetica, Arial, sans-serif; font-size: 12px; background-color: #ffffff;">首先，我们必须添加一个外部存储库以获得Docker CE。我们将使用官方的Docker CE CentOS存储库。</p> <p style="box-sizing: border-box; margin-bottom: 10px; line-height: 23px; text-indent: 1em; text-align: justify; color: #3d4450; font-family: 'Microsoft Yahei', Helvetica, Arial, sans-serif; font-size: 12px; background-color: #ffffff;">安装步骤：</p> <div style="box-sizing: border-box; color: #3d4450; font-family: 'Microsoft Yahei', Helvetica, Arial, sans-serif; background-color: #ffffff; margin-top: 2em; margin-bottom: 1em;"><span style="box-sizing: border-box; color: #1e1e1e; letter-spacing: 2px; border-left: 3px solid #ff3030; border-right: 3px solid #ff3030; padding-left: 8px; padding-right: 8px; font-size: 12pt;"><strong style="box-sizing: border-box;">下载docker-ce的repo<br style="box-sizing: border-box;" /></strong></span></div> <pre style="box-sizing: border-box; font-family: Monaco, Menlo, Consolas, 'Courier New', monospace; font-size: 13px; white-space: pre-wrap; padding: 9.5px; margin-bottom: 10px; line-height: 1.42857; color: #333333; word-break: break-all; overflow-wrap: break-word; background-color: #f5f5f5; border: 1px solid #cccccc; border-radius: 4px;">$curl https://download.docker.com/<a style="box-sizing: border-box; color: #d2322d;" title="linux" href="https://www.linuxprobe.com/" target="_blank" rel="noopener">linux</a>/centos/docker-ce.repo -o /etc/yum.repos.d/docker-ce.repo % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 2424 100 2424 0 0 2669 0 --:--:-- --:--:-- --:--:-- 2666</pre> <div style="box-sizing: border-box; color: #3d4450; font-family: 'Microsoft Yahei', Helvetica, Arial, sans-serif; background-color: #ffffff; margin-top: 2em; margin-bottom: 1em;"><span style="box-sizing: border-box; color: #1e1e1e; letter-spacing: 2px; border-left: 3px solid #ff3030; border-right: 3px solid #ff3030; padding-left: 8px; padding-right: 8px; font-size: 12pt;"><strong style="box-sizing: border-box;">安装依赖（这是相比CentOS 7的关键步骤）</strong></span></div> <pre style="box-sizing: border-box; font-family: Monaco, Menlo, Consolas, 'Courier New', monospace; font-size: 13px; white-space: pre-wrap; padding: 9.5px; margin-bottom: 10px; line-height: 1.42857; color: #333333; word-break: break-all; overflow-wrap: break-word; background-color: #f5f5f5; border: 1px solid #cccccc; border-radius: 4px;">$yum install https://download.docker.com/linux/Fedora/30/x86_64/stable/Packages/containerd.io-1.2.6-3.3.fc30.x86_64.rpm Docker CE Stable - x86_64 9.3 kB/s | 22 kB 00:02 上次元数据过期检查：0:00:01 前，执行于 2020年04月19日 星期日 05时23分13秒。 containerd.io-1.2.6-3.3.fc30.x86_64.rpm 544 kB/s | 21 MB 00:40 依赖关系解决。 ================================================================================ 软件包 架构 版本 仓库 大小 ================================================================================ 安装: containerd.io x86_64 1.2.6-3.3.fc30 @commandline 21 M 替换 runc.x86_64 1.0.0-64.rc9.module_el8.1.0+272+3e64ee36 事务概要 ================================================================================ 安装 1 软件包 总计：21 M 确定吗？[y/N]： y</pre> <div style="box-sizing: border-box; color: #3d4450; font-family: 'Microsoft Yahei', Helvetica, Arial, sans-serif; background-color: #ffffff; margin-top: 2em; margin-bottom: 1em;"><span style="box-sizing: border-box; color: #1e1e1e; letter-spacing: 2px; border-left: 3px solid #ff3030; border-right: 3px solid #ff3030; padding-left: 8px; padding-right: 8px; font-size: 12pt;"><strong style="box-sizing: border-box;">安装docker-ce</strong></span></div> <pre style="box-sizing: border-box; font-family: Monaco, Menlo, Consolas, 'Courier New', monospace; font-size: 13px; white-space: pre-wrap; padding: 9.5px; margin-bottom: 10px; line-height: 1.42857; color: #333333; word-break: break-all; overflow-wrap: break-word; background-color: #f5f5f5; border: 1px solid #cccccc; border-radius: 4px;">$yum install docker-ce 上次元数据过期检查：0:01:42 前，执行于 2020年04月19日 星期日 05时23分13秒。 依赖关系解决。 ================================================================================ 软件包 架构 版本 仓库 大小 ================================================================================ 安装: docker-ce x86_64 3:19.03.8-3.el7 docker-ce-stable 25 M 安装依赖关系: libcgroup x86_64 0.41-19.el8 base 70 k docker-ce-cli x86_64 1:19.03.8-3.el7 docker-ce-stable 40 M 事务概要 ================================================================================ 安装 3 软件包 总下载：64 M 安装大小：273 M 确定吗？[y/N]： y</pre> <div style="box-sizing: border-box; color: #3d4450; font-family: 'Microsoft Yahei', Helvetica, Arial, sans-serif; background-color: #ffffff; margin-top: 2em; margin-bottom: 1em;"><span style="box-sizing: border-box; color: #1e1e1e; letter-spacing: 2px; border-left: 3px solid #ff3030; border-right: 3px solid #ff3030; padding-left: 8px; padding-right: 8px; font-size: 12pt;"><strong style="box-sizing: border-box;">启动docker</strong></span></div> <pre style="box-sizing: border-box; font-family: Monaco, Menlo, Consolas, 'Courier New', monospace; font-size: 13px; white-space: pre-wrap; padding: 9.5px; margin-bottom: 10px; line-height: 1.42857; color: #333333; word-break: break-all; overflow-wrap: break-word; background-color: #f5f5f5; border: 1px solid #cccccc; border-radius: 4px;">$systemctl start docker</pre> <p style="box-sizing: border-box; margin-bottom: 10px; line-height: 23px; text-indent: 1em; text-align: justify; color: #3d4450; font-family: 'Microsoft Yahei', Helvetica, Arial, sans-serif; font-size: 12px; background-color: #ffffff;">我们可以用以下<a style="box-sizing: border-box; color: #d2322d;" title="命令" href="https://www.linuxcool.com/" target="_blank" rel="noopener">命令</a>检查该服务是否正在正常运行：</p> <pre style="box-sizing: border-box; font-family: Monaco, Menlo, Consolas, 'Courier New', monospace; font-size: 13px; white-space: pre-wrap; padding: 9.5px; margin-bottom: 10px; line-height: 1.42857; color: #333333; word-break: break-all; overflow-wrap: break-word; background-color: #f5f5f5; border: 1px solid #cccccc; border-radius: 4px;">$systemctl status docker ● docker.service - Docker Application Container Engine Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor pre> Active: active (running) since Sun 2020-04-19 05:28:15 EDT; 8min ago Docs: https://docs.docker.com Main PID: 60217 (dockerd) Tasks: 15 Memory: 195.9M CGroup: /system.slice/docker.service ├─60217 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/conta> └─60528 /usr/bin/docker-proxy -proto tcp -host-ip 0.0.0.0 -host-port></pre> <p style="box-sizing: border-box; margin-bottom: 10px; line-height: 23px; text-indent: 1em; text-align: justify; color: #3d4450; font-family: 'Microsoft Yahei', Helvetica, Arial, sans-serif; font-size: 12px; background-color: #ffffff;">到此，Docker就安装成功了</p>