cat /etc/redhat-release

	yum -y install gcc
	yum -y install gcc-c++

yum install -y yum-utils

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

 yum makecache fast

 yum -y install docker-ce docker-ce-cli containerd.io

 systemctl start docker

 docker version
 docker run hello-world

 systemctl stop docker 
 yum remove docker-ce docker-ce-cli containerd.io 
 rm -rf /var/lib/docker
 rm -rf /var/lib/containerd

	systemctl daemon-reload
	systemctl restart docker