kubernetes-sigs/controller-runtime

Health v2 · maintenance only

Adoption not part of the score

2946 stars · 1305 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A set of Go libraries for building Kubernetes controllers and operators, providing a manager, controller, builder, and client abstractions on top of client-go. It is the runtime layer leveraged by Kubebuilder and Operator SDK.

Use cases

• write a kubernetes operator in go
• build a custom controller for a CRD
• reconcile custom resources in a k8s cluster
• scaffold a kubebuilder project runtime
• watch and react to kubernetes resource events
• implement the operator pattern for my app

When to choose

• you are writing Kubernetes controllers or operators in Go
• you use Kubebuilder or Operator SDK and need the underlying runtime
• you want managed informers, caches, and reconciliation loops instead of raw client-go

When to avoid

• you only need to query the Kubernetes API without a reconcile loop - use client-go directly
• you are writing operators in a non-Go language
• you need a one-off script rather than a long-running controller

Facets

library · maturity active

concurrency developer-tools sdk cloud-computing infrastructure-as-code developer-tools microservices go cross-platform kubernetes-operators controllers reconciliation kubebuilder operator-sdk api-machinery containers kubernetes linux

Member repositories

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