Book Image

Hands-on Kubernetes on Azure, Third Edition - Third Edition

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

Hands-on Kubernetes on Azure, Third Edition - Third Edition

By: Nills Franssens, Shivakumar Gopalakrishnan, Gunther Lenz

Overview of this book

Containers and Kubernetes containers facilitate cloud deployments and application development by enabling efficient versioning with improved security and portability. With updated chapters on role-based access control, pod identity, storing secrets, and network security in AKS, this third edition begins by introducing you to containers, Kubernetes, and Azure Kubernetes Service (AKS), and guides you through deploying an AKS cluster in different ways. You will then delve into the specifics of Kubernetes 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 applications and clusters. As you advance, you'll learn how to overcome common challenges in AKS and secure your applications with HTTPS. You will also learn how to secure your clusters and applications in a dedicated section on security. In the final section, you’ll learn about advanced integrations, which give you the ability to create Azure databases and run serverless functions on AKS as well as the ability to integrate AKS with a continuous integration and continuous delivery (CI/CD) pipeline using GitHub Actions. By the end of this Kubernetes book, you will be proficient in deploying containerized workloads on Microsoft Azure with minimal management overhead.
Table of Contents (22 chapters)
1
Foreword
Free Chapter
2
Section 1: The Basics
5
Section 2: Deploying on AKS
11
Section 3: Securing your AKS cluster and workloads
16
Section 4: Integrating with Azure managed services
21
Index

Setting up a CD pipeline

You already have a pipeline with a CI job that will build a new container image. In this section, you'll add a CD job to that pipeline that will deploy the updated container image to a deployment in Kubernetes.

To simplify the application deployment, a Helm Chart for the application has been provided in the website folder inside Chapter 15. You can deploy the application by deploying the Helm Chart. By deploying using a Helm Chart, you can override the Helm values using the command line. You've done this in Chapter 12, Connecting an app to an Azure database, when you configured WordPress to use an external database.

In this CD job you will need to execute the following steps:

  1. Check out the code.
  2. Get AKS credentials.
  3. Set up the application.
  4. (Optional) Get the service's public IP.

Let's start building the CD pipeline. For your reference, the full CI and CD pipeline has been provided in the pipeline-cicd.yaml...