02-docker-setup.md

Docker Setup

Install and configure Docker on Ubuntu.

1. Install Docker

# Remove old versions
sudo apt-get remove docker docker-engine docker.io containerd runc

# Install prerequisites
sudo apt-get update
sudo apt-get install ca-certificates curl gnupg lsb-release

# Add Docker GPG key
sudo mkdir -p /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

# Add repository
echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

# Install Docker
sudo apt-get update
sudo apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin

2. Configure Docker

Create /etc/docker/daemon.json:

{
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "10m",
    "max-file": "3"
  },
  "live-restore": true
}

Restart Docker:

sudo systemctl restart docker

3. Create Docker Network

docker network create web

This network will be shared by all containers that need to communicate with Traefik.

4. Verify Installation

docker --version
docker compose version
docker run hello-world

Next Steps

→ Traefik Setup