1.下载关于Docker的依赖环境

yum -y install yum-utils device-mapper-persistent-data lvm2

2. 设置一下下载Docker的镜像源

yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

3. 安装Docker

yum makecache fast
yum -y install docker-ce

4. 启动，并设置为开机自动启动，测试

# 启动Docker服务
systemctl start docker

# 设置开机自动启动
systemctl enable docker

# 测试
docker run hello-world

5. # x509: certificate has expired or is not yet valid的解决

yum -y install ntpdate
ntpdate ntp3.aliyun.com