Name: Unlocking the Power of CEL for Advanced Multi-Cluster Scheduling - Qing Hao & Jian Qiu, Red Hat
Start: 2025-06-10T17:00:00+0800
End: 2025-06-10T17:30:00+0800

10-11 June
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Tuesday June 10, 2025 17:00 - 17:30 HKT

Level 19 | Crystal Court II

The Common Expression Language (CEL) is a powerful solution already used in the Kubernetes API, with the recent Kubernetes v1.32 highlighting it for mutating admission policies. It is also used in Envoy and Istio. This topic will explore the benefits and features that CEL can offer for multi-cluster scheduling.

There is a growing demand for granular and customizable requirements in scheduling. For example, users may want to filter clusters with the label "version" > v1.30.0 instead of listing all versions. Many also wish to use their CRD fields or metrics for scheduling. CEL's extensibility effectively addresses these challenges as it can handle complex expressions.

In this talk, we will showcase how Open Cluster Management (OCM) leverages CEL in multi-cluster scheduling. Using the ClusterProfile API as an example, we will demonstrate how CEL meets complex scheduling needs and illustrate its potential to improve GPU utilization for AI applications by solving bin-packing challenges.

Speakers

Jian Qiu

Senior Principal Software Engineer, RedHat

Qiu Jian is a developer at Redhat mainly focusing on multiple cluster management.

Qing Hao

Senior Software Engineer, Red Hat

Qing Hao is a Senior Software Engineer at Red Hat, where she works as the maintainer of Open Cluster Management. She is also the CNCF Ambassador, the speaker at KubeCon China 2024, and the mentor for OSPP 2022 and GSoC 2024. Qing focuses on solving complex challenges... Read More →

Tuesday June 10, 2025 17:00 - 17:30 HKT
Level 19 | Crystal Court II

Emerging + Advanced

Content Experience Level Any
Presentation Language Chinese

KubeCon + CloudNativeCon China 2025

Jian Qiu

Qing Hao

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