安装工具包sudoyuminstall-yyum-utils替换国内源sudoyum-config-manager--add-repohttps://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.reposudosed-i's/download.docker.com/mirrors.aliyun.com/docker-ce/g'/etc/yum.repos.d/docker-ce.repo安装Dockersudoyuminstalldocker-cedocker-ce-clicontainerd.io防火墙设置firewall-cmd--permanent--zone=trusted--add-interface=docker0firewall-cmd--reload设置导致错误无法启动守护进程：初始化网络控制器时出错：创建默认“桥接”网络时出错：FailedtoprogramNATchain:ZONE_CONFLICT:'docker0'alreadyboundtoazonefirewall-cmd--zone=trusted--remove-interface=docker0#解决方法，删除docker0firewall-cmd--get-zone-of-interface=docker0firewall-cmd--reloadstartsudosystemctlenabledockersudosystemctlstartdocker#查看错误命令dockerd建立docker用户组sudouseradddockersudogroupadddockersudousermod-Gdockerdockertestdockerrunhello-world错误解决（应该是docker权限问题）systemctldaemon-reloadsudo服务dockerre启动sudoservicedockerstatus(应该看到active(running))sudodockerrunhello-world`#重启服务器解决
