Book Image

Kubernetes for Developers

By : Joseph Heck
Book Image

Kubernetes for Developers

By: Joseph Heck

Overview of this book

Kubernetes is documented and typically approached from the perspective of someone running software that has already been built. Kubernetes may also be used to enhance the development process, enabling more consistent testing and analysis of code to help developers verify not only its correctness, but also its efficiency. This book introduces key Kubernetes concepts, coupled with examples of how to deploy and use them with a bit of Node.js and Python example code, so that you can quickly replicate and use that knowledge. You will begin by setting up Kubernetes to help you develop and package your code. We walk you through the setup and installation process before working with Kubernetes in the development environment. We then delve into concepts such as automating your build process, autonomic computing, debugging, and integration testing. This book covers all the concepts required for a developer to work with Kubernetes. By the end of this book, you will be in a position to use Kubernetes in development ecosystems.
Table of Contents (16 chapters)
Title Page
Packt Upsell
Contributors
Preface
Index

Kubernetes resources – service


So far, all the details we have explored have been related to a single container running within Kubernetes. The significant benefits of leveraging Kubernetes start to come into play when leveraging many containers running together. Being able to group together a set of Pods that all do the same thing, so that we can scale them and access them, is what the Kubernetes resource Service is all about.

A Service is the Kubernetes resource used to provide an abstraction through to your Pod (or Pods) that is agnostic of the specific instances that are running. Providing a layer between what one container (or set of containers) provides, such as a frontend web application, and another layer, such as a database, allows Kubernetes to scale them independently, update them, handle scaling issues, and more. A service also can contain a policy by which data should be transferred, so you might consider it a software load balancer within Kubernetes.

A Service is also the key...