This article explains how Kubernetes CustomResourceDefinitions (CRDs) let users create custom resources, how Operators add behavior to those resources, and provides a step‑by‑step Kubebuilder tutorial for scaffolding, generating, and running a simple Foo operator.
This article explains how Kubernetes uses the List/Watch API and the Informer client library to monitor resources, compares direct HTTP Watch with Informer, provides Go code examples for pod controllers, shared informers, custom CRD controllers, and introduces higher‑level frameworks such as controller‑runtime and Kubebuilder.
KubeSphere builds a cloud‑native container management system atop Kubernetes, offering multi‑cloud, multi‑cluster management, declarative APIs, and RBAC‑based permission control through its core components ks‑console, ks‑apiserver, and ks‑controller‑manager, while leveraging CustomResources, controllers, and Go‑restful for extensible, secure operations.
