Build a Raspberry Pi Container Host with Docker Compose
A Raspberry Pi Docker Compose host with health checks, safer update habits, and a small-service layout that is easy to maintain.
Expected Outcome
A working Raspberry Pi container host that can run multiple Docker containers with automated health checks and a safe update process.
Assumptions
- Raspberry Pi (any model with Raspbian OS installed)
- Basic knowledge of Linux command line
- Internet connection
- SSH access to the Raspberry Pi
Bill of Materials
- Raspberry Pi
- MicroSD card (16GB or larger)
- Power supply for Raspberry Pi
- Network cable or Wi-Fi connection
- Computer for SSH access
Build Steps
- Update System Packages
Ensure your Raspberry Pi is running the latest packages.
Safe to run: read-only
sudo apt update sudo apt upgrade -y
- Install Docker
Install Docker on your Raspberry Pi.
Safe to run: read-only
curl -fsSL https://get.docker.com -o get-docker.sh sh get-docker.sh sudo usermod -aG docker pi
- Install Docker Compose
Install Docker Compose to manage multi-container applications.
Changes system state: review before running
sudo apt install -y libffi-dev libssl-dev sudo apt install -y python3 python3-pip sudo pip3 install docker-compose
- Create a Docker Compose File
Set up a Docker Compose file to define your containers.
Safe to run: read-only
mkdir ~/my_docker_app cd ~/my_docker_app nano docker-compose.yml
- Define Services in Docker Compose
Edit the docker-compose.yml file to define your services with health checks.
Safe to run: read-only
version: '3' services: web: image: nginx ports: - '80:80' healthcheck: test: ['CMD', 'curl', '-f', 'http://localhost'] interval: 30s timeout: 10s retries: 3
- Deploy the Containers
Use Docker Compose to deploy the defined services.
Changes system state: review before running
docker-compose up -d
- Set Up Safe Update Workflows
Implement a workflow for safe updates of your containers.
Changes system state: review before running
docker-compose pull docker-compose up -d docker system prune -f
Validation
- Check if the containers are running using 'docker ps'.
- Verify health check status using 'docker inspect <container_id>'.
Troubleshooting
- If a step fails, capture the exact command, exit code, and log line before retrying or changing the design.
- Use `docker compose ps` and `docker compose logs <service>` to separate image, environment, port, and volume problems.
Cleanup or Rollback
- Keep a copy of working configuration, compose files, scripts, and service credentials before removing containers, packages, or data directories.
- Stop test containers with `docker compose down` only after confirming which volumes contain persistent data.
- Rollback by redeploying the previous compose file or image tag and restoring the saved environment file.
Next Improvements
- Explore additional Docker images to deploy.
- Implement persistent storage for your containers.
- Set up a monitoring solution for your containers.