metacontroller/metacontroller

Health v2 · maintenance only

Adoption not part of the score

1005 stars · 105 forks observed · 2026-09-03

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

Metacontroller is a Kubernetes add-on that lets you write and deploy custom controllers as simple webhook scripts in any language. It handles watches, caching, work queues, retries, and level-triggered reconciliation so you only provide JSON-in/JSON-out logic.

Use cases

• write a kubernetes custom controller without go boilerplate
• build a kubernetes operator in python or javascript
• add custom automation logic on top of existing kubernetes apis
• create reusable crd-based abstractions for my cluster
• implement statefulset-like behavior with custom resources
• deploy controller hooks as simple http webhooks

When to choose

• you want custom Kubernetes controller behavior without maintaining a full Go controller with informers and client libraries
• you want to write controller logic in any language via a JSON webhook
• you want built-in production features like caching, retries, garbage collection, and adopt/orphan semantics
• you want to compose existing Kubernetes APIs into higher-level declarative abstractions

When to avoid

• you need fine-grained control over the reconcile loop or controller internals
• you prefer a full-featured operator SDK with generated code and typed clients
• you cannot run an additional add-on and webhook endpoints in your cluster
• you need sub-millisecond reaction times, since webhooks add latency

Facets

framework · maturity active

webhook middleware workflow-automation developer-tools cloud-computing infrastructure-as-code go cloud self-hosted kubernetes-controllers custom-resources operators crd webhook-hooks declarative-apis kubernetes devops automation docker

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markdown · JSON · MCP: product_card(name="metacontroller/metacontroller")