Book Image

Hands-On Kubernetes on Azure - Second Edition

By : Nills Franssens, Shivakumar Gopalakrishnan, Gunther Lenz
Book Image

Hands-On Kubernetes on Azure - Second Edition

By: Nills Franssens, Shivakumar Gopalakrishnan, Gunther Lenz

Overview of this book

From managing versioning efficiently to improving security and portability, technologies such as Kubernetes and Docker have greatly helped cloud deployments and application development. Starting with an introduction to Docker, Kubernetes, and Azure Kubernetes Service (AKS), this book will guide you through deploying an AKS cluster in different ways. You’ll then explore the Azure portal by deploying a sample guestbook application on AKS and installing complex Kubernetes apps using Helm. With the help of real-world examples, you'll also get to grips with scaling your application and cluster. As you advance, you'll understand how to overcome common challenges in AKS and secure your application with HTTPS and Azure AD (Active Directory). Finally, you’ll explore serverless functions such as HTTP triggered Azure functions and queue triggered functions. By the end of this Kubernetes book, you’ll be well-versed with the fundamentals of Azure Kubernetes Service and be able to deploy containerized workloads on Microsoft Azure with minimal management overhead.
Table of Contents (16 chapters)
1
Section 1: The Basics
4
Section 2: Deploying on AKS
10
Section 3: Leveraging advanced Azure PaaS services
15
Index

4. Building scalable applications

When running an application, the ability to scale and upgrade your application is critical. Scaling is required to handle additional loads with your application, while upgrading is required to keep your application up to date and to be able to introduce new functionality.

Scaling on demand is one of the key benefits of using cloud-native applications. It also helps optimize resources for your application. If the front-end component encounters heavy loads, you can scale the front end alone, while keeping the same number of back-end instances. You can increase or reduce the number/size of Virtual Machines (VM) required depending on your workload and peak demand hours. This chapter will cover both the scale dimensions in detail.

In this chapter, we will show you how to scale the sample guestbook application that we introduced in Chapter 3, Application deployment on AKS. We will first scale this application using manual commands, and afterward...