$ sudo yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-engine
$ sudo yum install -y yum-utils
$ sudo yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo
$ yum list docker-ce --showduplicates | sort -r
$ sudo yum install docker-ce docker-ce-cli containerd.io
$ sudo systemctl start docker
$ sudo docker run hello-world

If you would like to use Docker as a non-root user, you should now consider adding your user to the “docker” group with something like:

$ sudo usermod -aG docker your-user

Uninstall Docker Engine

1. Uninstall the Docker Engine, CLI, and Containerd packages:

   $ sudo yum remove docker-ce docker-ce-cli containerd.io
   

2. Images, containers, volumes, or customized configuration files on your host are not automatically removed. To delete all images, containers, and volumes:

   $ sudo rm -rf /var/lib/docker
   

   You must delete any edited configuration files manually.

Install Docker Engine on CentOS

Centos7下安装Docker（详细安装教程）

Docker 安装 添加普通用户执行权限（Centos7 ）