Book Image

Cloud Native with Kubernetes

By : Alexander Raul
Book Image

Cloud Native with Kubernetes

By: Alexander Raul

Overview of this book

Kubernetes is a modern cloud native container orchestration tool and one of the most popular open source projects worldwide. In addition to the technology being powerful and highly flexible, Kubernetes engineers are in high demand across the industry. This book is a comprehensive guide to deploying, securing, and operating modern cloud native applications on Kubernetes. From the fundamentals to Kubernetes best practices, the book covers essential aspects of configuring applications. You’ll even explore real-world techniques for running clusters in production, tips for setting up observability for cluster resources, and valuable troubleshooting techniques. Finally, you’ll learn how to extend and customize Kubernetes, as well as gaining tips for deploying service meshes, serverless tooling, and more on your cluster. By the end of this Kubernetes book, you’ll be equipped with the tools you need to confidently run and extend modern applications on Kubernetes.
Table of Contents (22 chapters)
1
Section 1: Setting Up Kubernetes
5
Section 2: Configuring and Deploying Applications on Kubernetes
11
Section 3: Running Kubernetes in Production
16
Section 4: Extending Kubernetes

Creating an ExternalName Service

Services of type ExternalName can be used to proxify applications that are not actually running on your cluster, while still keeping the Service as a layer of abstraction that can be updated at any time.

Let's set the scene: you have a legacy production application running on Azure that you want to access from within your cluster. You can access this legacy application at myoldapp.mydomain.com. However, your team is currently working on containerizing this application and running it on Kubernetes, and that new version is currently working in your dev namespace environment on your cluster.

Instead of asking your other applications to talk to different places depending on the environment, you can always point to a Service called my-svc in both your production (prod) and development (dev) namespaces.

In dev, this Service could be a ClusterIP Service that leads to your newly containerized application on Pods. The following YAML shows how the...