Docker Crash Course by Ranga Rao Khurana

About the Instructor

• Ranga Rao Khurana
• 20+ years of application development experience
• Proficient in Java, Python, JavaScript
• Experienced with frameworks: Spring Boot, REST API frameworks, Angular, React, and Vue
• AWS Certified Solution Architect
• Expertise in containerizing microservices using Docker

Course Objective

• Learn basics and fundamental commands of Docker
• Understand Docker containers, images, repositories, and registries
• Create Docker images for Spring Boot projects, including web applications, REST APIs, and full-stack applications
• Run containers for microservices
• Utilize Docker Compose for container management
• Use Docker Hub effectively (MySQL, Redis, RabbitMQ, etc.)

Prerequisites

• Basic Java programming knowledge
• Some experience with Spring and Spring Boot
• Knowledge of JavaScript and React (helpful but not necessary)

Course Resources

• GitHub repository for source code and step-by-step details: github.com/in28minutes/docker-crash-course
• Installation guides and troubleshooting instructions

Course Structure

Phase 1: Basic Understanding and Setup

1. Installation Guide

   • Install Java (versions > Java 8)
   • Install Eclipse (latest version)

2. Docker Installation

   • Install Docker Desktop on MacOS or Windows (very simple process)
   • Install Docker on Linux (more complex, follow specific instructions on Docker’s website)

3. Basic Docker Commands

   • Verify Docker installation using docker --version
   • docker run command overview: running containers
   • Example setup: running a Spring Boot REST API container
   • Publishing container ports to host ports

Phase 2: Hands-on with Docker

1. Running Containers

   • Pausing and unpausing containers
   • Inspecting containers
   • Pruning stopped containers
   • Difference between stopping and killing containers
   • Setting and utilizing restart policies for containers

2. Working with Docker Images

   • Understanding tagging: docker tag
   • Pulling images from Docker Hub: docker pull
   • Searching for images: docker search
   • Inspecting image history and details: docker image history, docker image inspect
   • Removing local images: docker image remove

Phase 3: Real-World Applications and Docker Compose

1. Containerizing Applications

   • Starting with simple REST APIs and progressively move to more complex applications
   • Full-stack applications: React frontend communicating with Spring Boot backend

2. Microservices and Docker Compose

   • Set up and run multiple microservices
   • Use docker-compose to manage multi-container applications

Phase 4: Advanced Concepts and Cloud Deployment

1. Docker in Cloud Environments
   • Understanding Docker's popularity and ease of use locally and on cloud platforms
   • Deploying Docker containers to cloud providers
   • Introduction to services like Azure Container Service and AWS Elastic Container Service (ECS)

Practical Exercises

• Hands-on practices for confirming understanding of each module
• Deploying sample applications to different environments using Docker

Tools and References

• Use GitHub repository for all source codes
• Utilize Docker Hub for official images
• Eclipse for project management and development

Final Notes

• Keep practicing the Docker commands to gain confidence
• Make sure to handle dependencies using the pom.xml in your Maven projects
• Refer to provided resources for troubleshooting and additional knowledge

Key Takeaways

• Docker simplifies deployment and consistency across environments
• Containers are lightweight compared to traditional virtual machines
• Images contain all dependencies needed for applications
• Docker Compose facilitates multi-container applications management

Additional Resources

• Troubleshooting guides and playlists available within the course resources
• Stay updated with Docker and cloud service updates to leverage new features