Install Docker

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Fast AI in Docker Container
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Benedict Thekkel

Install Docker on Linux

Set up Docker’s apt repository.

# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc

# Add the repository to Apt sources:
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update

Install the Docker packages.

sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

Verify the Installation

Check if Docker is installed correctly by running

sudo docker --version

Docker Check

Verify that the Docker Engine installation is successful by running the hello-world image.

sudo docker run hello-world

Manage Docker as a Non-Root User (Optional)

Create the docker group.

sudo groupadd docker

Add your user to the docker group.

sudo usermod -aG docker $USER

You can also run the following command to activate the changes to groups:

newgrp docker

Configure Docker to start on boot with systemd

sudo systemctl enable docker.service
sudo systemctl enable containerd.service
sudo systemctl enable docker

To stop this behavior, use disable instead.

sudo systemctl disable docker.service
sudo systemctl disable containerd.service

Uninstall Docker

Uninstall the Docker Engine, CLI, containerd, and Docker Compose packages:

sudo apt-get purge docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin docker-ce-rootless-extras

Removing Images, containers, volumes

Images, containers, volumes or custom configuration files on your host aren’t automatically removed. To delete all images, containers, and volumes:

sudo rm -rf /var/lib/docker
sudo rm -rf /var/lib/containerd

Using Docker Compose

Install Docker Compose

sudo apt-get update
sudo apt-get install docker-compose-plugin

or

sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose

Create a docker-compose.yml File

Create a docker-compose.yml file in your project directory

version: '3'
services:
  web:
    image: nginx
    ports:
      - "80:80"
  db:
    image: mysql:5.7
    environment:
      MYSQL_ROOT_PASSWORD: example

Run Docker Compose

docker-compose up

Managing Docker Volumes and Networks

Volumes: Used to persist data outside of containers

docker volume create my_volume
docker run -d -v my_volume:/data ubuntu

Networks: Used to allow containers to communicate

docker network create my_network
docker run -d --network=my_network --name=container1 ubuntu
docker run -d --network=my_network --name=container2 ubuntu

Clean Up Unused Docker Resources

Over time, Docker might accumulate unused resources. You can clean them up with

docker system prune -a
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