Docker is a daemon-based container engine which allows us to deploy applications inside containers. With the release of RHEL 8 and CentOS 8, docker package has been removed from their default package repositories, docker has been replaced with podman and buildah.

Install-Docker-CE-CentOS8

If are comfortable with docker and deploy most the applications inside the docker containers and does not want to switch to podman then this tutorial will guide you on how to install and use community version of docker on CentOS 8 and RHEL 8 system.

Docker is available in two versions,

  • Docker CE (Community Edition)
  • Enterprise Edition (EE)

In this guide we will learn how to install Docker CE (Community Edition) on CentOS 8 or RHEL 8 Server.

System Requirements for Docker CE

  • Minimal CentOS 8 / RHEL 8
  • Sudo or root privileges
  • Internet Connection

Installation Steps of Docker CE on CentOS 8/RHEL 8 Server

Step:1) Enable Docker CE Repository

As we said above, docker packages are not available anymore on CentOS 8 or RHEL 8 package repositories, run following dnf command to enable Docker CE package repository.

[[email protected] ~]# dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo

Step:2) Install Docker CE using dnf command

Once the docker ce repo has been configured successfully then run following command to verify which version of docker is available for installation

[[email protected] ~]# dnf list docker-ce
Available Packages
docker-ce.x86_64              3:19.03.5-3.el7                                           docker-ce-stable
[[email protected] ~]#

Now, use beneath dnf command to install latest version of docker,

[[email protected] ~]# dnf install docker-ce --nobest -y

After the installation of docker, start and enable its service using the following systemctl commands

[[email protected] ~]# systemctl start docker
[[email protected] ~]# systemctl enable docker

Run the following command to verify installed docker version

[[email protected] ~]# docker --version
Docker version 18.06.3-ce, build d7080c1
[[email protected] ~]#

Step:3) Verify and test Docker CE Engine

To verify whether docker ce engine has been setup correctly or not, try to spin up a “hello-world” container using below docker command,

[[email protected] ~]# docker run hello-world

Output of above command

hello-world-container-centos8

As we can see the informational message in above output which confirms docker engine is setup correctly on CentOS 8 / RHEL 8 Server. Let’s move to docker compose installation.

Step:4) Install Docker Compose

As we know that docker compose is used to link multiple containers using a single command. In other words, Docker Compose is useful where we need to launch multiple containers and these containers depends on each other. Examples like launching LAMP/ LEMP applications (WordPress & Joomla etc) insider containers.

Run the following commands to install docker compose on CentOS 8 / RHEL 8,

[[email protected] ~]# dnf install curl -y
[[email protected] ~]# curl -L "https://github.com/docker/compose/releases/download/1.25.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

Note: Replace the “1.25.0” with docker compose version that you want to install but at this point of time this is the latest and stable version of docker compose.

Set the executable permission to docker-compose binary

[[email protected] ~]# chmod +x /usr/local/bin/docker-compose

Verify the docker compose version by running the following command.

[[email protected] ~]# docker-compose --version
docker-compose version 1.25.0, build 0a186604
[[email protected] ~]#

That’s all from this tutorial, I hope these steps help you to setup docker and docker compose on CentOS 8 and RHEL 8 server.

Read Also: How to Use docker-compose to launch containers

from Linuxtechi https://www.linuxtechi.com/install-docker-ce-centos-8-rhel-8/