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

1. 准备docker离线包

下载需要安装的docker版本，这里已docker-17.03.2-ce.tgz版本为例子。

准备docker.service 系统配置文件

[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

准备安装脚本和卸载脚本

#!/bin/sh

echo '解压tar包...'

tar -xvf $1

echo '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.service

echo '重新加载配置文件...'

systemctl daemon-reload

echo '启动docker...'

systemctl start docker

echo '设置开机自启...'

systemctl enable docker.service

echo 'docker安装成功...'

docker -v

#!/bin/sh

echo '删除docker.service...'

rm -f /etc/systemd/system/docker.service

echo '删除docker文件...'

rm -rf /usr/bin/docker*

echo '重新加载配置文件'

systemctl daemon-reload

echo '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)

4.2 执行脚本sh install.sh docker-17.03.2-ce.tgz

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

5 离线下容器的导入导出

镜像的导出及导入

docker save -o update1.tar update //镜像的导出

docker load < update1.tar //镜像的导入

docker load -i update1.tar //镜像的导入

ocker import - update < update.tar//容器导出用这种方式导入

docker export cbe3cb7799ed > update.tar //容器导出