安装docker

$ sudo yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine

yum install docker

systemctl start docker

docker run hello-world

vim /etc/docker/daemon.json

{
  "registry-mirrors": ["https://qsicl1hp.mirror.aliyuncs.com"]
}

systemctl daemon-reload

systemctl restart docker