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Docker Compose Hands-on Repository

• A collection of Hands-on Docker Compose labs.
• Each lab is a standalone lab and does not require to complete the previous labs.

Pre-Requirements

• Docker installation
• Docker Compose (included with Docker Desktop)

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Preface

• Docker Compose is a tool for defining and running multi-container Docker applications
• With Compose, you use a YAML file to configure your application's services
• Then, with a single command, you create and start all the services from your configuration
• Docker Compose simplifies the development, testing, and deployment of complex applications

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Docker Compose Overview

• Docker Compose allows you to define multiple services in a single YAML file.
• Services can be linked together through networks and dependencies.
• Compose manages the entire application lifecycle.

Key Benefits

• Simplified Multi-Container Management: Define and run multiple containers with a single command
• Environment Consistency: Ensure the same environment across development, testing, and production
• Service Dependencies: Control the startup order and dependencies between services
• Network Isolation: Create isolated networks for your application components
• Volume Management: Persist data and share files between containers and the host

Docker Compose File Structure

• A docker-compose.yml file defines your application's services, networks, and volumes
• Services: Define the containers that make up your application
• Networks: Create custom networks for service communication
• Volumes: Manage data persistence and sharing

Core Concepts

version

• Specifies the Compose file format version
• Different versions support different features
• Latest version provides the most features and compatibility

services

• The main section where you define your application containers
• Each service represents a single container
• Services can be built from Dockerfiles or use existing images

networks

• Define custom networks for service communication
• Services on the same network can communicate using service names
• Provides isolation between different application components

volumes

• Define named volumes for data persistence
• Share data between containers
• Persist data beyond container lifecycle

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Lab Structure

The repository contains the following hands-on labs:

001-intro

• Introduction to Docker Compose
• Installation and basic concepts
• Understanding the benefits of multi-container orchestration

002-Compose-Demo

• Basic docker-compose.yml file structure
• Multi-service application example
• Web server, application, and database integration

002-Structure

• Detailed docker-compose.yml structure
• Common service configurations
• Best practices for service definition

003-Commands

• Essential Docker Compose commands
• Managing application lifecycle
• Debugging and troubleshooting

004-Compose-2Helm

• Converting Docker Compose to Helm charts
• Kubernetes deployment strategies
• Migration from development to production

005-Compose-Advanced

• Advanced Docker Compose features
• Complex service configurations
• Production-ready setups

006-Watch

• Docker Compose Watch feature
• Live reload and development workflows
• File synchronization and hot reloading

007-Networks

• Advanced multi-network architecture
• Network segmentation and security
• Service discovery and isolation patterns
• DMZ and monitoring network configurations

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Getting Started

1. Clone the repository

   git clone https://github.com/nirgeier/DockerComposeLabs.git
   cd DockerComposeLabs

2. Verify Docker Compose installation

   docker-compose --version
   # or
   docker compose version

3. Navigate to any lab directory

   cd Labs/001-intro

4. Follow the lab instructions

   • Each lab contains detailed README files
   • Step-by-step instructions are provided
   • Code examples and explanations included

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Common Docker Compose Commands

• docker-compose up: Create and start containers
• docker-compose up -d: Start containers in detached mode
• docker-compose down: Stop and remove containers
• docker-compose ps: List running containers
• docker-compose logs: View container logs
• docker-compose exec: Execute commands in running containers
• docker-compose build: Build or rebuild services

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Resources

The resources directory contains:

• Configuration files for various services
• Sample YAML files for different scenarios
• Supporting materials and documentation
• Server application examples

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Additional Features

Docker Compose Watch

• Automatic file synchronization
• Live reload capabilities
• Enhanced development experience
• Real-time updates without rebuilding

Service Orchestration

• Health checks and dependency management
• Scaling services up or down
• Load balancing and service discovery
• Rolling updates and zero-downtime deployments

Production Considerations

• Security best practices
• Performance optimization
• Monitoring and logging
• Backup and recovery strategies

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Support

• Each lab is self-contained with detailed explanations
• Common issues and solutions are documented
• Best practices and tips are included throughout
• Real-world examples and use cases provided

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Happy Learning! 🐳