How to Install Docker Engine - Community (EC) on CentOS 7,8

How to Install Docker Engine - Community (EC) on CentOS 7,8 with Latest Version

Uninstall old versions 

Step1 :- sudo yum remove docker \

                  docker-client \

                  docker-client-latest \

                  docker-common \

                  docker-latest \

                  docker-latest-logrotate \

                  docker-logrotate \

                  docker-engine

or

sudo yum remove docker-ce

sudo rm -rf /var/lib/docker

Install docker ce

Step2 :- sudo dnf install docker-ce-3:18.09.1-3.el7

DNS resolution

Step3 :- sudo systemctl disable firewalld

Start and enable docker daemon

Step4 :- sudo systemctl enable --now docker

or 

sudo systemctl start docker

Verify that Docker EC is installed

Step5 :- sudo docker run hello-world

Adding user to docker group

Step5 :-  sudo usermod -aG docker $USER

Log out and again log in back

Now install the containerd.io package

If you cannot use Docker’s repository to install Docker, you can download the .rpm file for your release and install it manually. You need to download a new file each time you want to upgrade Docker Engine - Community.

Step6 :- sudo dnf install https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.2.6-3.3.el7.x86_64.rpm

Install latest version of docker ce

Step7 :- sudo dnf install docker-ce