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

Summary


In this chapter, we reviewed jobs and CronJobs, which Kubernetes provides to support batch and scheduled batch processing, respectively. We also looked through a Python example of how to set up a Celery worker queue with RabbitMQ and configure the two deployments to work together. We then looked at how Kubernetes can provide persistence with volumes, PersistentVolume, and its concept of PersistentVolumeClaims for automatically creating volumes for deployments as needed. Kubernetes also supports Stateful Sets for a variation of deployment that requires stable identity and persistent volumes, and we looked at a simple Node.js example converting our previous example of a deployment into a Stateful Set. We finished the chapter with a look at Custom Resource Definitions, used to extend Kubernetes.

In the next chapter, we start to look at how to leverage Kubernetes to get information about all these structures. We review how to capture and view metrics, leveraging Kubernetes and additional...