In this chapter, extending Kubernetes was covered, where we enabled converting domain expertise into automation and intervening Kubernetes operations. Firstly, the extension points in Kubernetes were presented to show its built-in extension
capabilities. Throughout the chapter, new resources were added to the Kubernetes API, and their operations were automated so that Kubernetes can work for custom resources in addition to the built-in ones. Following this, resource creation logic was extended with dynamic admission controllers, and you were shown how to include operational requirements in the Kubernetes API resource life cycle.
Finally, configuring the scheduler of Kubernetes was presented to cover all extensive
requirements for nodes and inter-pod relations. How to write, deploy, and use a custom scheduler was also shown. With the extension capabilities included in...