Book Image

Cloud Native Applications with Ballerina

By : Dhanushka Madushan
Book Image

Cloud Native Applications with Ballerina

By: Dhanushka Madushan

Overview of this book

The Ballerina programming language was created by WSO2 for the modern needs of developers where cloud native development techniques have become ubiquitous. Ballerina simplifies how programmers develop and deploy cloud native distributed apps and microservices. Cloud Native Applications with Ballerina will guide you through Ballerina essentials, including variables, types, functions, flow control, security, and more. You'll explore networking as an in-built feature in Ballerina, which makes it a first-class language for distributed computing. With this app development book, you'll learn about different networking protocols as well as different architectural patterns that you can use to implement services on the cloud. As you advance, you'll explore multiple design patterns used in microservice architecture and use serverless in Amazon Web Services (AWS) and Microsoft Azure platforms. You will also get to grips with Docker, Kubernetes, and serverless platforms to simplify maintenance and the deployment process. Later, you'll focus on the Ballerina testing framework along with deployment tools and monitoring tools to build fully automated observable cloud applications. By the end of this book, you will have learned how to apply the Ballerina language for building scalable, resilient, secured, and easy-to-maintain cloud native Ballerina projects and applications.
Table of Contents (15 chapters)
1
Section 1: The Basics
4
Section 2: Building Microservices with Ballerina
8
Section 3: Moving on with Cloud Native

Introducing serverless architecture

When you are building a web service, you need to think about where it should be deployed and how it should be deployed. We have already discussed Infrastructure as a Service (IaaS) – the cloud platform that provides physical or Virtual Machines (VM) to host services. With serverless architecture, you do not need to worry about infrastructure implementation and maintenance and you can focus on only writing code that serves your customers. The traditional way of deploying cloud applications uses the following infrastructure options to host the service:

  • Runs on bare metal
  • Runs on a VM
  • Runs on a container

There are multiple problems and challenges associated with deploying applications with the aforementioned methods. The following are some of those:

  • Management and maintenance: Infrastructure management tasks such as updating and patching and so on bring an additional overhead for developers. They need to consider...