ansiblings/packages/cubes-core/cubes/runtime/docker

docker

Install Docker and tools

Purpose

This cube installs Docker Engine, Docker Compose, and popular Docker management tools to enable containerized application deployment and management.

What is Docker?

Docker is a platform for developing, shipping, and running applications in containers. Containers package an application with all its dependencies, ensuring it runs consistently across different environments.

Key benefits:

• Isolation: Each container runs independently with its own filesystem, network, and processes
• Portability: Containers run the same way on any system that supports Docker
• Efficiency: Containers share the host OS kernel, making them lighter than virtual machines
• Scalability: Easily deploy and scale containerized applications

What This Cube Does

1. Adds Docker's official repository

   • Downloads and installs Docker's GPG key
   • Configures APT to use Docker's official package repository

2. Installs Docker components

   • docker-ce - Docker Community Edition engine
   • docker-ce-cli - Command-line interface for Docker
   • containerd.io - Container runtime
   • docker-buildx-plugin - Extended build capabilities with BuildKit
   • docker-compose-plugin - Tool for defining multi-container applications

3. Installs management tools

   • lazydocker - Terminal UI for Docker and Docker Compose management
   • docker-ctop - Container metrics and monitoring (top-like interface for containers)

Configuration

This cube currently has no configurable parameters.

Dependencies

None - this cube can run standalone.

Post-Installation

After deployment:

• Add users to the docker group to run Docker without sudo: sudo usermod -aG docker username
• Start using Docker: docker run hello-world
• Use lazydocker for easy management: lazydocker
• Monitor containers: ctop

Notes

The Docker daemon starts automatically on boot. You can manage it with systemd:

• Check status: sudo systemctl status docker
• Restart: sudo systemctl restart docker

Additional Resources

• Installation tutorial Ubuntu 24.04