Book Image

Scala Microservices

By : Selvam Palanimalai, Jatin Puri
Book Image

Scala Microservices

By: Selvam Palanimalai, Jatin Puri

Overview of this book

<p>In this book we will learn what it takes to build great applications using Microservices, the pitfalls associated with such a design and the techniques to avoid them. </p><p>We learn to build highly performant applications using Play Framework. You will understand the importance of writing code that is asynchronous and nonblocking and how Play leverages this paradigm for higher throughput. The book introduces Reactive Manifesto and uses Lagom Framework to implement the suggested paradigms. Lagom teaches us to: build applications that are scalable and resilient to failures, and solves problems faced with microservices like service gateway, service discovery, communication and so on. Message Passing is used as a means to achieve resilience and CQRS with Event Sourcing helps us in modelling data for highly interactive applications. </p><p>The book also shares effective development processes for large teams by using good version control workflow, continuous integration and deployment strategies. We introduce Docker containers and Kubernetes orchestrator. Finally, we look at end to end deployment of a set of scala microservices in kubernetes with load balancing, service discovery and rolling deployments. </p><p></p>
Table of Contents (12 chapters)

Production Containers

In the last chapter, we looked into the setup of an effective development process, server virtualization, and Linux containers. In continuation, we will be learning how to deploy and manage containers on production workload. As production systems need monitoring, access control, load balancing, scheduling, we need sophisticated distributed software to run them, enter kubernetes, a container orchestrator. This chapter talks about the critical components needed by kubernetes to run clusters of containers. Server automation tools are another important section explaining how we can prepare the virtual servers to run kubernetes. We look at one of such tools, Ansible, with a detailed example. We deep dive into kubernetes internals and run example apps. Lastly, we focus on monitoring and security features to keep in mind when using kubernetes.

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