kubernetes-sigs/kubebuilder

Health v2 · maintenance only

Adoption not part of the score

9294 stars · 1696 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Kubebuilder is an SDK and scaffolding framework for building Kubernetes APIs and controllers in Go using custom resource definitions (CRDs). It generates project boilerplate on top of controller-runtime and controller-tools, following the canonical patterns used to build core Kubernetes APIs.

Use cases

• scaffold a kubernetes operator in go
• create custom resource definitions and controllers
• build a kubernetes api extension
• generate webhook and controller boilerplate
• learn kubernetes api design patterns
• bootstrap a controller-runtime project

When to choose

• you are writing Kubernetes operators or controllers in Go
• you want canonical, best-practice scaffolding for CRD-based APIs
• you want a plugin architecture and integration with controller-runtime

When to avoid

• you only need to deploy apps to Kubernetes rather than extend its API
• you are building operators in non-Go languages without the plugin ecosystem
• you want a lightweight client library only - use client-go directly

Facets

framework · maturity stable

sdk developer-tools middleware developer-tools cloud-computing infrastructure-as-code apis go cli cross-platform kubernetes crd operator controller-runtime scaffolding api-machinery k8s-sig-api-machinery code-generation

Member repositories

For agents

markdown · JSON · MCP: product_card(name="kubernetes-sigs/kubebuilder")