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

An overview of Azure AD pod-managed identities

The goal of this section is to describe Azure managed identities and Azure AD pod-managed identities.

As explained in the introduction, managed identities in Azure are a way to securely authenticate applications running inside Azure. There are two types of managed identities in Azure. The difference between them is how they are linked to resources:

  • System assigned: This type of managed identity is linked 1:1 to the resource (such as a virtual machine) itself. This managed identity also shares the lifecycle of the resource, meaning that once the resource is deleted, the managed identity is also deleted.
  • User assigned: User-assigned managed identities are standalone Azure resources. A user-assigned managed identity can be linked to multiple resources. When a resource is deleted, the managed identity is not deleted.

Both types of managed identities work the same way once they are created and linked to a resource. This...