kubernetes-operator

To build a Kubernetes operator with controller-runtime, design a CRD with structural schema validation and implement an idempotent reconcile loop that handles status subresources, finalizers, and deterministic requeues to prevent resource drift.

A Kubernetes operator reconcile loop drifts or orphans resources due to missing finalizers, accidental spec mutations, blocking calls, or improper requeue handling. Enforce idempotent reconciliation and correct finalizer cleanup to resolve these issues.

The best way to design a CRD schema is to apply structural schema validation, configure status subresources to prevent spec mutation, and define standard status conditions and printer columns for production-ready operator API surfaces.

Audit a Kubernetes operator for OperatorHub capability levels by assessing its maturity across installation, upgrades, lifecycle handling, observability, and automation, ensuring leader election and operator capability best practices are met.

Yes, this Skill works with kubebuilder and controller-runtime workflows to debug reconcile loops, enforce finalizer handling, validate status conditions, and harden custom resource reconciliation for production-grade operator deployment.

Add finalizers to Kubernetes custom resources when your operator manages external resources that require explicit cleanup. Finalizers ensure the reconcile loop blocks deletion until external dependencies are safely removed, preventing orphaned resources.