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

Example – integration testing with Node.js


The Node.js example uses mocha, chai, supertest, and the JavaScript kubernetes client in much the same fashion as the Python example. The example code can be found on GitHub, in the 0.7.0 branch of the repository at https://github.com/kubernetes-for-developers/kfd-nodejs/.

You can download the example using the following command:

git clone https://github.com/kubernetes-for-developers/kfd-nodejs/ -b 0.7.0

I took advantage of Node.js's mechanism to have development dependencies separate from production dependencies, and added most of these dependencies into package.json. I also went ahead and set up a simple unit test directly in a test directory, and a separate integration test in an e2e-tests directory. I also set up the commands so that you can run these tests through npm:

npm test

For the unit tests, the code runs locally and takes advantage of supertest to access everything within a JavaScript runtime on your local machine. This doesn't account for...