k8s-controller-ops

Kubernetes controller leader election uses Lease-based patterns to ensure a single active reconciler. This provides fast failover and safe reconciliation across development, staging, and production environments.

Kubernetes controller finalizers should use MergeFrom patches for idempotent cleanup. This ensures safe resource deletion by preventing orphaned dependencies and guaranteeing cleanup operations complete during controller restarts.

Server-Side Apply (SSA) is needed for Kubernetes controllers managing owned resources declaratively. SSA tracks field ownership, preventing conflicts between multiple controllers writing to the same resources during reconciliation.

Drift detection for Kubernetes controllers uses periodic re-sync to compare actual cluster state against desired state. This ensures continuous state correction and maintains desired configuration across development, staging, and production workflows.

Yes, Kubernetes controller RBAC supports least-privilege configuration for controller components. This restricts permissions to only necessary resources and verbs, reducing blast radius and improving production security posture.

Long-running Kubernetes controllers handle credential rotation through secure secret management patterns. This maintains valid authentication without downtime during periodic security rotations or key expirations in production environments.