1.下载docker源码

wget https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/static/stable/x86_64/docker-18.09.0.tgz  --no-check-certificate

2.将解压出来的docker目录下的指令复制到 /usr/bin/ 目录下

tar xf docker-18.09.0.tgz
cp docker/* /usr/bin/　

3.将docker注册为service服务
新建该文件

vi /etc/systemd/system/docker.service

加入以下内容：

[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target
  
[Service]
Type=notify
ExecStart=/usr/bin/dockerd -g /opt/docker  
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLim