Installing docker and docker compose on almalinux 9

Docker does not explicitly support almalinux, so we have to use centos repository instead.

Below are the steps:

1. Update system

sudo dnf --refresh update

sudo dnf upgrade -y

2. Enable docker repository

sudo dnf install yum-utils

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

3. Install docker

sudo dnf install docker-ce docker-ce-cli containerd.io docker-compose-plugin -y

4. Enable and start docker

sudo systemctl enable --now docker

5. Add user to docker group

sudo usermod -G docker -a myuser

6. Refresh group list 

newgrp

7. Check docker and docker compose version

docker version

docker compose version