Docker Installation

Uninstall old versions:

sudo yum remove -y docker 
docker-client 
docker-client-latest 
docker-common 
docker-latest 
docker-latest-logrotate 
docker-logrotate 
docker-engine

Add the Utilities needed for Docker:

sudo yum install -y yum-utils 
device-mapper-persistent-data 
lvm2

Set up the stable repository:

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

Install Docker CE:

sudo yum -y install docker-ce

Enable and start Docker:

sudo systemctl start docker && sudo systemctl enable docker

Add cloud_user to the docker group:

sudo usermod -aG docker user//that you created