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

Networking and network security in AKS

This section serves as an introduction to the concepts of networking and security in AKS. You'll first cover the control plane, then workload networking, and then network security.

Control plane networking

The control plane of a Kubernetes cluster is the infrastructure that hosts the Kubernetes API server for your cluster, manages the scheduler, and stores the cluster state. When you interact with a Kubernetes cluster, for instance, by using kubectl, you are sending commands to the Kubernetes API server. In AKS, this control plane is managed by Microsoft and provided to you as a service.

By default, the control plane is exposed over the internet and is accessible to everybody that is connected to the internet. This doesn't mean that the control plane is not secure though. Even if an attacker had network access to your control plane, they would still need to have cluster credentials to execute commands against the control plane...