install docker

How to install docker by yum.

yum install yum-utils -y

yum-config-manager  --add-repo  https://download.docker.com/linux/centos/docker-ce.repo

yum install docker-ce-19.03.9-3.el7 docker-ce-cli-19.03.9-3.el7 containerd.io docker-compose-plugin -y

systemctl start docker

docker version