Microservices and Containers

by Parminder Kocher

Overview

Transition to Microservices and DevOps to Transform Your Software Development Effectiveness

Thanks to the tech sector’s latest game-changing innovations—the Internet of Things (IoT), software-enabled networking, and software as a service (SaaS), to name a few—there is now a seemingly insatiable demand for platforms and architectures that can improve the process of application development and deployment.

In Microservices and Containers, longtime systems architect and engineering team leader Parminder Kocher analyzes two of the hottest new technology trends: microservices and containers. Together, as Kocher demonstrates, microservices and Docker containers can bring unprecedented agility and scalability to application development and deployment, especially in large, complex projects where speed is crucial but small errors can be disastrous.

Learn how to leverage microservices and Docker to drive modular architectural design, on-demand scalability, application performance and reliability, time-to-market, code reuse, and exponential improvements in DevOps effectiveness. Kocher offers detailed guidance and a complete roadmap for transitioning from monolithic architectures, as well as an in-depth case study that walks the reader through the migration of an enterprise-class SOA system.

• Understand how microservices enable you to organize applications into standalone components that are easier to manage, update, and scale
• Decide whether microservices and containers are worth your investment, and manage the organizational learning curve associated with them
• Apply best practices for interprocess communication among microservices
• Migrate monolithic systems in an orderly fashion
• Understand Docker containers, installation, and interfaces
• Network, orchestrate, and manage Docker containers effectively
• Use Docker to maximize scalability in microservices-based applications
• Apply your learning with an in-depth, hands-on case study

Whether you are a software architect/developer or systems professional looking to move on from older approaches or a manager trying to maximize the business value of these technologies, Microservices and Containers will be an invaluable addition to your library.

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Product Details

ISBN-13:	9780134598383
Publisher:	Pearson Education
Publication date:	04/12/2018
Pages:	304
Product dimensions:	6.90(w) x 9.00(h) x 0.80(d)

About the Author

Parminder Kocher is a lifelong technology learner with two decades of hands-on experience in building enterprise-grade software systems. He is with Cisco Systems since 2005 and managed company’s Remote Management Service (RMS) platform, and has since worked as an innovation evangelist leading multiple software groups. Currently, he is engineering director for Cisco Networking Academy platform, where he leads the engineering teams responsible for developing the Academy’s next-gen platform. In addition to bachelor’s and master’s degrees in computer science, Kocher has an executive MBA from Baylor’s Hankamer School of Business, and an executive certificate in strategy and innovation from MIT’s Sloan School of Management. Kocher was born and raised in India, and currently lives in Austin, Texas, with his wife and three children, and serves as committee chair of the Boy Scout troop he founded in 2013.

Table of Contents

Preface xiii

Acknowledgments xv

About the Author xvii

Part I: Microservices 1

Chapter 1: An Introduction to Microservices 3

What Are Microservices? 3

Modular Architecture 8

Other Advantages of Microservices 9

Disadvantages of Microservices 11

Chapter 2: Switching to Microservices 13

Fatigues and Attributes 14

Learning Curve for the Organization 15

Business Case for Microservices 17

Cost Components 18

Chapter 3: Interprocess Communication 23

Types of Interactions 23

Preparing to Write Web Services 24

Microservice Maintenance 25

Discovery Service 26

Putting It All Together 28

Chapter 4: Migrating and Implementing Microservices 33

The Need for Transition 33

Creating a New Application with Microservices 35

Migrating a Monolithic Application to Microservices 40

A Hybrid Approach 45

Part II: Containers 47

Chapter 5: Docker Containers 49

Virtual Machines 50

Containers 52

Docker Architecture and Components 54

The Power of Docker: A Simple Example 57

Chapter 6: Docker Installation 61

Installing Docker on Mac OS X 61

Installing Docker on Windows 66

Installing Docker on Ubuntu Linux 68

Chapter 7: Docker Interface 73

Key Docker Commands 73

Dockerfile 95

Docker Compose 100

Chapter 8: Containers Networking 105

Key Linux Concepts 105

Linking 106

Default Options 110

Custom Networks 116

Chapter 9: Container Orchestration 123

Kubernetes 123

Apache Mesos and Marathon 129

Docker Swarm 132

Service Discovery 136

Service Registry 139

Chapter 10: Containers Management 143

Monitoring 143

Logging 144

Metrics Collection 147

Cluster-wide Monitoring Tools 150

Part III: Hands-On Project—Putting Learning into Practice 169

Chapter 11: Case Study: Monolithic Helpdesk Application 171

Helpdesk Application Overview 171

Application Architecture 172

Building the Application 190

New Requirements and Bug Fixes 200

Chapter 12: Case Study: Migration to Microservices 203

Planning for Migration 203

Converting to Microservices 207

Application Build and Deployment 212

New Requirements and Bug Fixes 217

Chapter 13: Case Study: Containerizing a Helpdesk Application 221

Containerizing Microservices 221

Deploying the Catalog Microservice 235

Updating the Monolithic Application 246

Conclusion 247

What Is DevOps? 247

Only the Beginning 250

Appendix A: Helpdesk Application Flow 251

Administrator Flows 252

Customer Flows 255

Support Desk Engineer Flows 260

Appendix B: Installing the Solr Search Engine 263

Prerequisites 263

Installation Steps 263

Configuring Solr for Simple Data Import 265

Index 267