This article explains the role of kube‑scheduler in Kubernetes, details its scheduling process, describes the plugin‑based framework with extension points such as PreEnqueue, Filter and Bind, and provides complete code examples and deployment instructions for building custom scheduler plugins.
This article describes how Zhongtong tackled severe pod‑scheduling imbalance in its Kubernetes clusters by extending the scheduler with the Scheduling Framework, adding custom filter and score plugins that balanced CPU load, boosted overall utilization from 30% to 50%, and reduced manual scheduling interventions by about 80%.
This article explains the inner workings of the Kubernetes scheduler, details its pre‑score, score, and normalize‑score phases, discusses zone handling and resource fragmentation, and demonstrates how to extend the scheduler using the Scheduling Framework with a custom Go plugin.
This article explains how Kubernetes' Kube‑scheduler has evolved from early Extender and multiple‑scheduler approaches to the modern Scheduling Framework, detailing its architecture, extension points, and a step‑by‑step guide to building a custom QoS plugin with code examples.
