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The Reflector in Kubernetes' client-go is a core component responsible for synchronizing resources from the API server into a local store—typically a DeltaFIFO queue. It achieves this by performing an initial list operation followed by a continuous watch, ensuring that all changes to watched resources are captured and enqueued for processing by ...

Introduction The Kubernetes client-go library provides a powerful mechanism for interacting with the API server. At the heart of this library lies the Informer pattern, which enables developers to efficiently watch and respond to changes in cluster resources. This article explores the internal workings of the Informer mechanism within client-go ...

The ListWatcher component provides core functionality for the Reflector pattern in Kubernetes controllers. This mechenism enables efficient resource synchronization by combining initial list operations with subsequent watch events. Constructing ListWatcher Instances ListWatcher objects are created using factory functions that configure their li ...