前言
有时候会遇到服务器不能联网的情况，这样就没法用yum安装软件，docker也是如此，针对这种情况，总结了一下离线安装docker的步骤，分享给大家
1. 准备docker离线包
下载需要安装的docker版本，我此次下载的是
docker-17.03.2-ce.tgz版本
2. 准备docker.service 系统配置文件
docker.service
[Unit]Description=Docker Application Container EngineDocumentation=https://docs.docker.comAfter=network-online.target firewalld.serviceWants=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 dockerExecStart=/usr/bin/dockerdExecReload=/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=infinityLimitNPROC=infinityLimitCORE=infinity# Uncomment TasksMax if your systemd version supports it.# Only systemd 226 and above support this version.#TasksMax=infinityTimeoutStartSec=0# set delegate yes so that systemd does not reset the cgroups of docker containersDelegate=yes# kill only the docker process, not all processes in the cgroupKillMode=process# restart the docker process if it exits prematurelyRestart=on-failureStartLimitBurst=3StartLimitInterval=60s[Install]WantedBy=multi-user.target
3. 准备安装脚本和卸载脚本
安装脚本 install.sh
#!/bin/shecho '解压tar包...'tar -xvf $1echo '将docker目录移到/usr/bin目录下...'cp docker/* /usr/bin/echo '将docker.service 移到/etc/systemd/system/ 目录...'cp docker.service /etc/systemd/system/echo '添加文件权限...'chmod +x /etc/systemd/system/docker.serviceecho '重新加载配置文件...'systemctl daemon-reloadecho '启动docker...'systemctl start dockerecho '设置开机自启...'systemctl enable docker.serviceecho 'docker安装成功...'docker -v
卸载脚本 uninstall.sh
#!/bin/shecho '删除docker.service...'rm -f /etc/systemd/system/docker.serviceecho '删除docker文件...'rm -rf /usr/bin/docker*echo '重新加载配置文件'systemctl daemon-reloadecho '卸载成功...'
4. 安装
4.1 此时目录为：（只需要关注docker-17.03.2-ce.tgz、docker.service、install.sh、uninstall.sh即可）
1.PNG
4.2 执行脚本 sh install.sh docker-17.03.2-ce.tgz
执行过程如下：
2.PNG
待脚本执行完毕后，执行docker -v
发现此时docker已安装成功，可以用docker --help 查看docker命令，从现在开始你就可以自己安装image和container了
4.3 如果你想卸载docker，此时执行脚本 sh uninstall.sh即可，执行过程如下：
3.PNG
此时输入docker -v，发现docker已经卸载
多次动手操作以后，发现docker离线安装如此方便，希望对你有所帮助
