Book Image

Effortless Cloud-Native App Development Using Skaffold

By : Ashish Choudhary
Book Image

Effortless Cloud-Native App Development Using Skaffold

By: Ashish Choudhary

Overview of this book

Kubernetes has become the de facto standard for container orchestration, drastically improving how we deploy and manage cloud-native apps. Although it has simplified the lives of support professionals, we cannot say the same for developers who need to be equipped with better tools to increase productivity. An automated workflow that solves a wide variety of problems that every developer faces can make all the difference! Enter Skaffold – a command-line tool that automates the build, push, and deploy steps for Kubernetes applications. This book is divided into three parts, starting with common challenges encountered by developers in building apps with Kubernetes. The second part covers Skaffold features, its architecture, supported container image builders, and more. In the last part, you'll focus on practical implementation, learning how to deploy Spring Boot apps to cloud platforms such as Google Cloud Platform (GCP) using Skaffold. You'll also create CI/CD pipelines for your cloud-native apps with Skaffold. Although the examples covered in this book are written in Java and Spring Boot, the techniques can be applied to apps built using other technologies too. By the end of this Skaffold book, you'll develop skills that will help accelerate your inner development loop and be able to build and deploy your apps to the Kubernetes cluster with Skaffold.
Table of Contents (15 chapters)
1
Section 1: The Kubernetes Nightmare – Skaffold to the Rescue
5
Section 2: Getting Started with Skaffold
9
Section 3: Building and Deploying Cloud-Native Spring Boot Applications with Skaffold

Creating a Reactive Spring Boot CRUD application

To demonstrate working with various container image builders that Skaffold supports, we will create a simple Reactive Spring Boot CRUD REST application. We expose a REST endpoint called /employee when the app is accessed locally through curl or a REST client such as Postman, which will return with employee data.

First, to build some context, let's discuss the reactive way of building an application. Reactive programming (https://projectreactor.io/) is a new way of building non-blocking applications that are asynchronous, event-driven, and require a small number of threads to scale. What also keeps them separate from typical non-reactive applications is that they can provide the backpressure mechanism to ensure producers don't overwhelm consumers.

Spring WebFlux is a reactive web framework that was introduced with Spring 5. Spring WebFlux doesn't require a servlet container and can be run on non-blocking containers...