Docker Engine and Compose Install Centos 8

Updated: 2020-12-09

Published: 2020-12-07

Intro

Docker and docker-compose are a very common tools for developing and deploying applications.

In this post I will cover the process of installing Docker engine and Docker compose on Centos 8 minimal.

Software Used In This Post

  • Centos Minimal - 8.2.2004
  • Docker Engine CE - 19.03.14
  • Docker Compose - 1.27.4

Pre-Flight Check

Ensure that there are no default versions of Docker install. There should not be, but it's worth confirming.

cmd
rpm -qa | grep docker

Docker Install

Add the Docker community edition repository.

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

Install Docker, the CLI tools and containerd.

cmd
sudo dnf install -y docker-ce docker-ce-cli containerd.io

Start and enable Docker.

cmd
sudo systemctl start docker
sudo systemctl enable docker

Add the docker0 interface to the trusted zone in firewalld.

Important
This allows containers to resolve hostnames to IP addresses. Without it, any thing that relies on name resolution will not work.
cmd
sudo firewall-cmd --permanent --zone=trusted --add-interface=docker0
sudo firewall-cmd --reload

Add your user to docker group.

cmd
sudo usermod -aG docker $USER

Now logout and log back in or run the newgrp docker command.

Verify Docker Install

Confirm that you can run docker commands.

cmd
docker pull hello-world

# Output

Using default tag: latest
latest: Pulling from library/hello-world
0e03bdcc26d7: Pull complete 
Digest: sha256:e7c70bb24b462baa86c102610182e3efcb12a04854e8c582838d92970a09f323
Status: Downloaded newer image for hello-world:latest
docker.io/library/hello-world:latest

Docker Compose Install

Install the docker-compose binary from the Github release page.

cmd
sudo curl -L "https://github.com/docker/compose/releases/download/1.27.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

Make the docker-compose binary executable.

cmd
sudo chmod +x /usr/local/bin/docker-compose

Symlink the docker-compose binary into a location in your $PATH.

cmd
sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose

Update the docker-compose binaries permissions.

cmd
sudo chgrp docker /usr/local/bin/docker-compose
sudo chmod 750 /usr/local/bin/docker-compose

Verify Docker Compose Install

Confirm that you can run docker-compose commands.

cmd
docker-compose --version

# Output

docker-compose version 1.27.4, build 40524192

Outro

This post covered the process of installing Docker engine and Docker compose on Centos 8 Minimal.