[DevOps Basics 1] Monolith to Microservice Conversion with Spring/Python/Node.js and Strangler Fig Pattern

Legacy Monolith to MSA ?

Let's use the Strangler Fig Pattern to safely and gradually migrate an existing legacy monolithic system to a microservices architecture.

Case 1: When should you transition to microservices?

We'll tell you the criteria and preparatory steps to consider when implementing microservices in your organization or project .

Case 2 I want to do TDD using unit testing in Java / Python / Node.js, but how should I mock each function?

By presenting and explaining unit tests in Java, Python & Node.js , we will provide a foundation for you to start practicing TDD in practice with copy & paste .

Case 3 Is it possible to experience an environment based on another programming language in a way similar to real-world situations?

We'll walk you through the entire process of decomposing from a monolith to microservices . We'll also provide up to two code reviews for your code.

Case 4: What technologies are needed to transition to microservices?

We will introduce and practice not only the programming techniques used when transitioning to microservices, but also the techniques that can facilitate smooth operation .

• ✅ Build confidence in unit test-based TDD and reduce the frustration of writing your first unit tests.
• ✅ Increase your understanding of Containerization using Docker-Compose and Dockerfile.
• ✅ You can obtain an integrated analysis method through telemetry to respond to issues that may arise during MSA operation.
• ✅ You can learn about the API Gateway Pattern through Spring Cloud Gateway and how to deal with CORS errors that frequently occur in the frontend.

Q. I don't have any practical DevOps experience . Can I still take the course?

This course is designed for beginners, so anyone with basic coding knowledge can take it. For more information, please see the [Prerequisites] section below.

Q. Do I have to take the " DevOps Essentials " course to take this course?

Although you will understand this lecture better if you take the "DevOps Essentials" lecture, you can take this lecture without taking that lecture. There is a part that summarizes the relevant parts of the "DevOps Essentials" lecture that are necessary for taking this lecture.

Q. Why do you provide code reviews up to two times?

Code reviews are conducted on the assumption that the content included in a Pull Request has been implemented to a workable level. Accordingly, when a knowledge sharer reviews the code requested by a student and provides feedback, we provide up to two code reviews to ensure that any changes based on feedback are appropriate.

• To smoothly complete the lecture, you'll need a PC with macOS, Linux, or Windows 10/11 64-bit with WSL 2 support and at least 8GB of memory . (Visual Studio Code is used as the code editor in this course.)
• For course materials, please see the notes at the bottom of the [Section 2 - Introduction to Project Set Monolith Architect] course . A link to a Google Form requesting access to the source code repository is provided. Source code access may take up to 48 hours to be approved, and you are prohibited from sharing the source code or content of this course with others.
• Prerequisite knowledge is the ability to use at least one programming language .