Extend Kubernetes API with Custom Resource Definitions (CRDs)

Learn How to Create and Manage CRDs for Custom Resources in Kubernetes

Introduction

A Custom Resource Definition (CRD) in Kubernetes allows you to extend the Kubernetes API by defining your own custom resources. These custom resources can represent any kind of domain-specific entity, and you can manage them using standard Kubernetes tools like kubectl.

Overview of Custom Resource Definitions (CRDs)

• Custom Resources: These are extensions of the Kubernetes API. They allow you to create your own custom resource types that can be managed like built-in resources (e.g., Pods, Services).
• Custom Resource Definitions (CRDs): These are used to define the schema and behavior of custom resources. Once a CRD is created, you can create instances of the custom resource it defines.

Steps to Create and Use a Custom Resource Definition

Step 1: Define the Custom Resource Definition (CRD)

The CRD defines the structure and behavior of your custom resource. Here is an example of a simple CRD for a custom resource called MyApp.