1、下载docker安装文件
离线安装docker，需要下载docker的安装文件。
地址：https://download.docker.com/linux/static/stable/x86_64/
我下的是最新的版本[docker-19.03.6.tgz]，文件不大，只有60M左右。
2、离线docker安装
将安装包文件上传到服务器目录并解压。
[root@iZbp13sno1lc2yxlhjc4b3Z ~]#tar -xvf docker-19.03.6.tar
将解压出来的docker文件内容移动到 /usr/bin/ 目录下
[root@iZbp13sno1lc2yxlhjc4b3Z ~]#cp docker/* /usr/bin/
将docker注册为service，在/etc/systemd/system目录下创建docker.service文件，并配置如下内容保存。
[root@iZbp13sno1lc2yxlhjc4b3Z ~]#vim /lib/systemd/system/docker.service
[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 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
添加文件权限并启动docker，执行如下命令：
chmod +x /etc/systemd/system/docker.service #添加文件权限 systemctl daemon-reload #重载unit配置文件 systemctl start docker #启动Docker systemctl enable docker.service #设置开机自启
验证docker安装是否成功：
systemctl status docker #查看Docker状态 docker -v #查看Docker版本
Docker离线安装好后，下面我们把镜像导入到Docker。
