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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.
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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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
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
Docker Compose 100
Chapter 8: Containers Networking 105
Key Linux Concepts 105
Default Options 110
Custom Networks 116
Chapter 9: Container Orchestration 123
Apache Mesos and Marathon 129
Docker Swarm 132
Service Discovery 136
Service Registry 139
Chapter 10: Containers Management 143
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
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
Installation Steps 263
Configuring Solr for Simple Data Import 265