The server bought on vultr, CentOS 7 x64, cannot be connected to ssh after restarting after installing docker, and port 22 of scavenging port is also closed.
The control variable method has been tried several times, but once docker is installed, it cannot be restarted and cannot be connected.

curl -fsSL  get.docker.com -o get-docker.sh
 sh get-docker.sh
 
 curl -L https://github.com/docker/compose/releases/download/1.21.2/docker-compose-`uname -s`-`uname -m` -o /usr/bin/docker-compose
 chmod +x /usr/bin/docker-compose

Use these two commands to install docker-ce and docker-compose