Summary
In this chapter, we delved into the concepts of CRDs and Kubernetes Operators, two pivotal elements that enhance Kubernetes’ extensibility and automation capabilities. We began by understanding CRDs, which allow the creation of CR types tailored to specific application needs. This included a detailed look at how to define and manage CRDs and their role in extending the Kubernetes API to support new resource types.
Next, we explored Kubernetes Operators, which leverage CRDs to automate the management of complex applications. Operators encapsulate operational knowledge, enabling automatic application deployment, scaling, and maintenance. We discussed the critical components of Operators, including CRs, controllers, and the reconciliation loop, and walked through developing and deploying an Operator.
The chapter also covered various types of webhooks—mutating, validating, conversion, and authentication webhooks—and their use in conjunction with CRDs...
