1、下载 Docker
https://download.docker.com/linux/static/stable/x86_64/
2、解压压缩文件
tar -zxvf docker-19.03.8.tgz
3、将解压好的 Docker 文件复制到 /usr/bin 目录下
cp docker/* /usr/bin/
4、在 /etc/systemd/system/ 目录下新增 docker.service 文件，将 docker 注册为服务，内容如下
[Unit] Description=Docker Application Container Engine Documentation=https://docs.docker.com After=network-online.target firewalld.service Wants=network-online.target [Service] Type=notify # the default is not to use systemd for cgroups because the delegate issues still # exists and systemd currently does not support the cgroup feature set required # for containers run by docker ExecStart=/usr/bin/dockerd --selinux-enabled=false --insecure-registry=127.0.0.1 ExecReload=/bin/kill -s HUP $MAINPID # Having non-zero Limit*s causes performance problems due to accounting overhead # in the kernel. We recommend using cgroups to do container-local accounting. LimitNOFILE=infinity LimitNPROC=infinity LimitCORE=infinity # Uncomment TasksMax if your systemd version supports it. # Only systemd 226 and above support this version. #TasksMax=infinity TimeoutStartSec=0 # set delegate yes so that systemd does not reset the cgroups of docker containers Delegate=yes # kill only the docker process, not all processes in the cgroup KillMode=process # restart the docker process if it exits prematurely Restart=on-failure StartLimitBurst=3 StartLimitInterval=60s [Install] WantedBy=multi-user.target此处的--insecure-registry=127.0.0.1（此处改成你私服ip）设置是针对有搭建了自己私服Harbor时允许docker进行不安全的访问，否则访问将会被拒绝。
启动 docker
5、为 docker.service 文件添加执行权限
chmod +x /etc/systemd/system/docker.service
6、重新加载配置文件
systemctl daemon-reload
7、启动，设置开机启动，查看docker服务状态
systemctl start docker systemctl enable docker.service systemctl status docker
8、成功页面如下
