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

Creating an HTTP-triggered Azure function

In this first example, you will create an HTTP-triggered Azure function. This means that you can browse to the page hosting the actual function:

  1. To begin, create a new directory and navigate to that directory:
    mkdir http
    cd http
  2. Now, you will initialize a function using the following command:
    func init --docker

    The ––docker parameter specifies that you will build the function as a Docker container. This will result in a Dockerfile being created. Select the Python language, which is option 3 in the following screenshot:

    Creating a Python function

    Figure 14.12: Creating a Python function

    This will create the required files for your function to work.

  3. Next, you will create the actual function. Enter the following command:
    func new

    This should result in an output like the following. Select the eighth option, HTTP trigger, and name the function python-http:

    Creating an HTTP-triggered function using the required option

    Figure 14.13: Creating an HTTP-triggered function

  4. The code of the function is stored in the...