The article explains how to design and implement a sharded WorkQueue in Kubernetes' controller-runtime, enabling concurrent processing while guaranteeing that resources belonging to the same node are handled sequentially within a single goroutine, using hash-based partitioning and custom queue structures.
The article shows how adding Transform functions to client-go and controller-runtime informers trims metadata, cutting apiserver memory usage by up to 60% when watching hundreds of Secrets and ConfigMaps in large Kubernetes clusters.
This article explains how to simplify Kubernetes controller development by using the controller-runtime library and the Kubebuilder scaffolding tool, covering manager and webhook concepts, providing full Go examples, YAML configurations, and step‑by‑step commands for building, deploying, and testing a custom Foo controller.
This article explains the inner workings of Kubernetes leader election, covering the configuration of kube-controller-manager, the controller-runtime implementation, resource lock types, the election workflow, and a practical example of building a high‑availability application using Go and lease locks.
