Summary of Microservices explained - the What, Why and How?

Summary of "Microservices explained - the What, Why and How?"

This video provides a comprehensive overview of Microservices architecture, contrasting it with traditional Monolithic Architecture, and delving into its benefits, challenges, and best practices.

Main Ideas and Concepts:

• Monolithic Architecture:
  • Definition: A single unit where all application components (e.g., user authentication, shopping cart, product catalog) are part of one codebase.
  • Challenges:
    • Difficult coordination among teams due to a large codebase.
    • Inflexibility in scaling; entire application must be scaled even if only one component needs it.
    • Dependency issues with third-party modules (e.g., conflicting versions).
    • Longer release cycles since any change requires rebuilding and redeploying the entire application.
• Microservices Architecture:
  • Definition: An application is broken down into multiple smaller, independent services that can be developed, deployed, and scaled separately.
  • Best Practices:
    • Services should be based on business functionalities (e.g., shopping cart, checkout).
    • Each microservice should perform a single isolated function and be self-contained.
    • Services should communicate through API Calls, Message Brokers, or service meshes.
  • Advantages:
    • Independent development and deployment cycles for each service.
    • Flexibility in using different programming languages and technology stacks for different services.
• Communication Between Microservices:
  • Common methods:
    • API Calls: Synchronous communication where services send HTTP requests to each other.
    • Message Brokers: Asynchronous communication using intermediaries (e.g., RabbitMQ).
    • Service Mesh: External service managing communication logic, often used in Kubernetes environments.
• Code Management for Microservices:
  • Monorepo (Single Repository):
    • All Microservices are stored in one repository, simplifying development and management.
    • Challenges include potential tight coupling of services and slower performance with large codebases.
  • Polyrepo (Multiple Repositories):
    • Each microservice has its own repository, allowing complete isolation.
    • Easier to manage CI/CD pipelines but can complicate cross-service changes and shared resources.
• CI/CD Pipelines:
  • Importance of CI/CD pipelines in deploying Microservices efficiently.
  • Companies like Amazon, Google, and Netflix deploy multiple times a day, showcasing the complexity of these pipelines.
• Tools and Technologies:
  • Mention of HashiCorp's tools (e.g., Terraform, Vault, Consul) to assist in managing Microservices.
  • Kubernetes highlighted as a powerful platform for running Microservices applications.

Methodology and Instructions:

• Best Practices for Microservices:
  • Structure Microservices around business functionalities.
  • Ensure Microservices are independent and self-contained.
  • Use appropriate communication methods (API, Message Brokers, service mesh).
• Choosing Between Monorepo and Polyrepo:
  • Use Monorepo for small projects with few Microservices for simplicity.
  • Use Polyrepo for larger projects with dedicated teams for each service to maintain isolation.

Featured Speakers/Sources:

• The speaker is not specifically named in the provided subtitles, but they reference HashiCorp and its co-founder and CTO for additional learning resources on related technologies.

Notable Quotes

— 03:16 — « The answer to all these issues was a microservices architecture. »

— 04:01 — « The best practice is to break down the application into components or into microservices based on the business functionalities and not technical functionalities. »

— 07:56 — « This is exactly the most important advantage of microservices architecture compared to the monolith. »

— 09:00 — « You definitely need a proper configuration of your application setup and its pieces to make sure your application as a whole functions well. »

— 09:48 — « Hashicorp also has a service mesh product called console which helps you securely connect and observe your microservices running in any environment. »

Category

Educational

Video