How do I install Docker CE on CentOS 7?

Pre-requisites

1. Docker is only supported on 64-bit systems, so make sure you have installed the correct OS. Check your architecture by running the following command:

   arch
   x86_64
   

2. centos-extra repository needs to be enabled.

How to install Docker CE on CentOS 7

You have 2 methods to install Docker CE:

Method 1 – Install using the repository (Recommended)

Install the required packages

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

yum-utils provides the yum-config-manager utility. device-mapper-persistent-data and lvm2 are required by the devicemapper storage driver.

Setup the Docker repository

Run the following to setup the docker repository:

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

Installing Docker CE

Run the following to install the latest Docker CE version:

yum install docker-ce

Method 2 – Manually install using the RPM

Download the RPM

Go to https://download.docker.com/linux/centos/7/x86_64/stable/Packages/ and download the Docker version you want to install. Use wget, for example:

wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-17.12.0.ce-1.el7.centos.x86_64.rpm

Installing Docker CE

Install the downloaded version of Docker CE using the following command:

yum install /your-path/to/package.rpm

Docker CE is now installed.

Start/Stop Docker service

Start the docker service using the following command:

systemctl start docker

If you want to enable the Docker Service at boot time :

systemctl enable docker

To stop the docker service:

systemctl stop docker

Verify installation

Verify the Docker CE installation by using either:

docker --version

or

docker info

Uninstalling Docker CE

Uninstall Docker by running:

yum remove docker-ce

Delete all images, containers, and volumes using:

rm -rf /var/lib/docker

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