Centos7 离线安装Dokcer（二进制方式）

一、背景

由于公司内部网络原因，无法使用在线安装Docker；试了很多种离线安装方式，由于Docker依赖了很多rpm，要离线安装必须得先安装依赖（较为麻烦，遂放弃）；最后使用二进制方式安装：把Docker注册为服务

二、准备

参考文档：https://docs.docker.com/install/linux/docker-ce/binaries/#install-static-binaries
下载地址：https://download.docker.com/linux/static/stable/x86_64/

download.png

三、安装

1、解压

$ tar xzvf /path/to/.tar.gz

2、将二进制文件移动到可执行文件路径上的目录中，例如/usr/bin/。如果跳过此步骤，则必须在调用docker或dockerd命令时提供可执行文件的路径。

$ cp docker/* /usr/bin/

3、启动Docker守护程序(此方式只是临时启动，重启后还需要重新启动，可跳过此步骤)

$ dockerd &

如果需要使用其他选项启动守护程序，请相应地修改上述命令，或者创建并编辑该文件/etc/docker/daemon.json 以添加自定义配置选项

3、将docker注册为service

$ vim /etc/systemd/system/docker.service

将以下内容拷贝到docker.service中

 [Unit]

Description=Docker Application Container Engine

Documentation=[https://docs.docker.com](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

4、启动

# 赋予权限
$ chmod +x /etc/systemd/system/docker.service
# 重新加载
$ systemctl daemon-reload
#启动Docker
$ systemctl start docker  
#设置开机自启       
$ systemctl enable docker.service     

5、检查是否安装成功

 #查看Docker状态
$ systemctl status docker      
#查看Docker版本     
$ docker -v