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Microservices - A Practical Guide

Principles, Concepts, and Recipes

Eberhard Wolff

There is a huge number of technologies to choose from when it comes to implementing a microservices system. This books how microservices system can be implemented in practise - including sample code on GitHub.

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About

About

About the Book

Microservices have many advantages: Efficiently implementing more features, bringing software into production faster, robustness and easy scalability are among them. But implementing a microservices architecture and selecting the necessary technologies are difficult challenges.

This book shows microservices recipes that architects can customize and combine into a microservices menu. In this way, the implementation of microservices can be individually adapted to the requirements of the project.

Eberhard Wolff introduces microservices, self-contained systems, micro- and macro-architecture and the migration to microservices. The second part shows the microservices recipes: Basic technologies such as Docker or PaaS, frontend integration with links, JavaScript or ESI (Edge Side Includes). This is followed by asynchronous microservices with Apache Kafka or REST / Atom. In the synchronous approaches, the book discusses REST with the Netflix stack, Consul, PaaS with Cloud Foundry, and Kubernetes. Finally, operations is discussed: Log Analysis with Elasticsearch and Kibana, Monitoring with Prometheus, and tracing with Zipkin.

The second edition is based on the feedback about the first edition. All chapters have been clarified, updated and extended. A new chapter discusses services meshes, in particular Istio with an example application. The second edition has about 35 pages more than the first edition.

For each recipe there are suggestions for variations and combinations. Readers can experience all technologies hands-on with a demo project on GitHub. The outlook picks up on the operation of microservices and also shows how the reader can start with microservices in concrete terms.

The book provides the technical tools to implement a microservices architecture. Demo projects and suggestions for self-study will complete the book.

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Author

About the Author

Eberhard Wolff

Eberhard Wolff has 20+ years of experience as an architect and consultant - often on the intersection of business and technology. He is the Head of Architecture at SWAGLab in Germany. As a speaker, he has given talks at international conferences and as an author, he has written more than 100 articles and books e.g. about Microservices and Continuous Delivery. His technological focus is on modern architectures – often involving Cloud, Domain-driven Design, DevOps, or Microservices.

Leanpub Podcast

Episode 96

An Interview with Eberhard Wolff

Contents

Table of Contents

0 Introduction

  1. 0.1 Structure of the Book
  2. 0.2 Target Group
  3. 0.3 Prior Knowledge
  4. 0.4 Quick Start
  5. 0.5 Acknowledgements
  6. 0.6 Website

Part I: Principles of Microservices

1 Microservices

  1. 1.1 Microservices: Definition
  2. 1.2 Reasons for Microservices
  3. 1.3 Challenges
  4. 1.4 Variations
  5. 1.5 Conclusion

2 Micro and Macro Architecture

  1. 2.1 Bounded Context and Strategic Design
  2. 2.2 Technical Micro and Macro Architecture
  3. 2.3 Operation: Micro or Macro Architecture?
  4. 2.4 Give a Preference to Micro Architecture!
  5. 2.5 Organizational Aspects
  6. 2.6 Independent Systems Architecture Principles (ISA)
  7. 2.7 Variations
  8. 2.8 Conclusion

3 Migration

  1. 3.1 Reasons for Migrating
  2. 3.2 A Typical Migration Strategy
  3. 3.3 Alternative Strategies
  4. 3.4 Build, Operation, and Organization
  5. 3.5 Variations
  6. 3.6 Conclusion

Part II: Technology Stacks

4 Docker

  1. 4.1 Docker for Microservices: Reasons
  2. 4.2 Docker Basics
  3. 4.3 Docker Installation and Docker Commands
  4. 4.4 Installing Docker Hosts with Docker Machine
  5. 4.5 Dockerfiles
  6. 4.6 Docker Compose
  7. 4.7 Variations
  8. 4.8 Conclusion

5 Technical Micro Architecture

  1. 5.1 Requirements
  2. 5.2 Reactive
  3. 5.3 Spring Boot
  4. 5.4 Go
  5. 5.5 Variations
  6. 5.6 Conclusion

6 Self-contained Systems

  1. 6.1 Reasons for the Term Self-contained Systems
  2. 6.2 Definition
  3. 6.3 An Example
  4. 6.4 SCSs and Microservices
  5. 6.5 Challenges
  6. 6.6 Benefits
  7. 6.7 Variations
  8. 6.8 Conclusion

7 Concept: Frontend Integration

  1. 7.1 Frontend: Monolith or Modular?
  2. 7.2 Options
  3. 7.3 Resource-oriented Client Architecture (ROCA)
  4. 7.4 Challenges
  5. 7.5 Benefits
  6. 7.6 Variations
  7. 7.7 Conclusion

8 Recipe: Links and Client-side Integration

  1. 8.1 Overview
  2. 8.2 Example
  3. 8.3 Variations
  4. 8.4 Experiments
  5. 8.5 Conclusion

9 Recipe: Server-side Integration using Edge Side Includes (ESI)

  1. 9.1 ESI: Concepts
  2. 9.2 Example
  3. 9.3 Varnish
  4. 9.4 Recipe Variations
  5. 9.5 Experiments
  6. 9.6 Conclusion

10 Concept: Asynchronous Microservices

  1. 10.1 Definition
  2. 10.2 Events
  3. 10.3 Challenges
  4. 10.4 Advantages
  5. 10.5 Variations
  6. 10.6 Conclusions

11 Recipe: Messaging and Kafka

  1. 11.1 Message-oriented Middleware (MOM)
  2. 11.2 The Architecture of Kafka
  3. 11.3 Events with Kafka
  4. 11.4 Example
  5. 11.5 Recipe Variations
  6. 11.6 Experiments
  7. 11.7 Conclusion

12 Recipe: Asynchronous Communication with Atom and REST

  1. 12.1 The Atom Format
  2. 12.2 Example
  3. 12.3 Recipe Variations
  4. 12.4 Experiments
  5. 12.5 Conclusion

13 Concept: Synchronous Microservices

  1. 13.1 Definition
  2. 13.2 Benefits
  3. 13.3 Challenges
  4. 13.4 Variations
  5. 13.5 Conclusion

14 Recipe: REST with the Netflix Stack

  1. 14.1 Example
  2. 14.2 Eureka: Service Discovery
  3. 14.3 Router: Zuul
  4. 14.4 Load Balancing: Ribbon
  5. 14.5 Resilience: Hystrix
  6. 14.6 Recipe Variations
  7. 14.7 Experiments
  8. 14.8 Conclusion

15 Recipe: REST with Consul and Apache httpd

  1. 15.1 Example
  2. 15.2 Service Discovery: Consul
  3. 15.3 Routing: Apache httpd
  4. 15.4 Consul Template
  5. 15.5 Consul and Spring Boot
  6. 15.6 DNS and Registrator
  7. 15.7 Recipe Variations
  8. 15.8 Experiments
  9. 15.9 Conclusion

16 Concept: Microservices Platforms

  1. 16.1 Definition
  2. 16.2 Variations
  3. 16.3 Conclusion

17 Recipe: Docker Containers with Kubernetes

  1. 17.1 Kubernetes
  2. 17.2 The Example with Kubernetes
  3. 17.3 The Example in Detail
  4. 17.4 Additional Kubernetes Features
  5. 17.5 Recipe Variations
  6. 17.6 Experiments
  7. 17.7 Conclusion

18 Recipe: PaaS with Cloud Foundry

  1. 18.1 PaaS: Definition
  2. 18.2 Cloud Foundry
  3. 18.3 The Example with Cloud Foundry
  4. 18.4 Recipe Variations
  5. 18.5 Experiments
  6. 18.6 Serverless
  7. 18.7 Conclusion

Part III: Operation

19 Concept: Operation

  1. 19.1 Why Operation Is Important
  2. 19.2 Approaches for the Operation of Microservices
  3. 19.3 Effects of the Discussed Technologies
  4. 19.4 Conclusion

20 Recipe: Monitoring with Prometheus

  1. 20.1 Basics
  2. 20.2 Metrics for Microservices
  3. 20.3 Metrics with Prometheus
  4. 20.4 Example with Prometheus
  5. 20.5 Recipe Variations
  6. 20.6 Experiments
  7. 20.7 Conclusion

21 Recipe: Log Analysis with the Elastic Stack

  1. 21.1 Basics
  2. 21.2 Logging with the Elastic Stack
  3. 21.3 Example
  4. 21.4 Recipe Variations
  5. 21.5 Experiments
  6. 21.6 Conclusion

22 Recipe: Tracing with Zipkin

  1. 22.1 Basics
  2. 22.2 Tracing with Zipkin
  3. 22.3 Example
  4. 22.4 Recipe Variations
  5. 22.5 Conclusion

23 Recipe: Service Mesh Istio

  1. 23.1 What Is a Service Mesh?
  2. 23.2 Example
  3. 23.3 How Istio Works
  4. 23.4 Monitoring with Prometheus and Grafana
  5. 23.5 Tracing with Jaeger
  6. 23.6 Visualization with Kiali
  7. 23.7 Logging
  8. 23.8 Resilience
  9. 23.9 Challenges
  10. 23.10 Benefits
  11. 23.11 Variations
  12. 23.12 Experiments
  13. 23.13 Conclusion

24 And Now What?

Appendix A: Installation of the Environment

Appendix B: Maven Commands

Appendix C: Docker and Docker Compose Commands

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