# 2021 Annual Report: SIG Scheduling ## Current initiatives 1. What work did the SIG do this year that should be highlighted? - Efficient re-queueing of pods, significantly cutting the number of failed scheduling cycles - Improvements to preemption performance - Simplified plugin configuration in component config - Scheduler simulator: https://github.com/kubernetes-sigs/kube-scheduler-simulator 2. What initiatives are you working on that aren't being tracked in KEPs? - Performance improvements and benchmarking - Code refactorings and cleanups - Enhancements to node resource -based scoring (see [101946](https://github.com/kubernetes/kubernetes/pull/101946) and [101822](https://github.com/kubernetes/kubernetes/pull/101822)) 3. KEP work in 2021 (1.x, 1.y, 1.z): - Stable - [2249 - Multi-scheduling Profiles](https://github.com/kubernetes/enhancements/tree/master/keps/sig-scheduling/1451-multi-scheduling-profiles) - 1.22 - [1845 - Prioritization on Volume Capacity](https://github.com/kubernetes/enhancements/tree/master/keps/sig-storage/1845-prioritization-on-volume-capacity) - 1.22 - Beta - [2249 - Namespace Selector for Pod Affinity](https://github.com/kubernetes/enhancements/tree/master/keps/sig-scheduling/2249-pod-affinity-namespace-selector) - 1.22 - [1923 - Prefer Nominated Node](https://github.com/kubernetes/enhancements/tree/master/keps/sig-scheduling/1923-prefer-nominated-node) - 1.22 - [2458 - Resource Fit Scoring Strategy](https://github.com/kubernetes/enhancements/tree/master/keps/sig-scheduling/2458-node-resource-score-strategy) - 1.22 - [2891 - Simplified Scheduler Config](https://github.com/kubernetes/enhancements/blob/master/keps/sig-scheduling/2891-simplified-config/kep.yaml) - 1.22 - [785 - Scheduler Component Config API](https://github.com/kubernetes/enhancements/tree/master/keps/sig-scheduling/785-scheduler-component-config-api) - 1.23 - [2926 - Job Mutable Scheduling Directives](https://github.com/kubernetes/enhancements/tree/master/keps/sig-scheduling/2926-job-mutable-scheduling-directives) - 1.23 - Alpha - None - Pre-alpha - None ## Project health 1. What areas and/or subprojects does your group need the most help with? Any areas with 2 or fewer OWNERs? (link to more details) - https://github.com/kubernetes-sigs/kube-scheduler-simulator is short of reviewers/owners. 2. What metrics/community health stats does your group care about and/or measure? - Diversity - Number of contributors - Meetings attendance 3. Does your [CONTRIBUTING.md] help **new** contributors engage with your group specifically by pointing to activities or programs that provide useful context or allow easy participation? - It looks up-to-date 4. If your group has special training, requirements for reviewers/approvers, or processes beyond the general [contributor guide], does your [CONTRIBUTING.md] document those to help **existing** contributors grow throughout the [contributor ladder]? - Nothing special. 5. Does the group have contributors from multiple companies/affiliations? - Yes 6. Are there ways end users/companies can contribute that they currently are not? If one of those ways is more full time support, what would they work on and why? - - ## Membership - Primary slack channel member count: 2529 - Primary mailing list member count: 586 - Primary meeting attendee count (estimated, if needed): 10 - Primary meeting participant count (estimated, if needed): 5 - Unique reviewers for SIG-owned packages: 6 - Unique approvers for SIG-owned packages: 4 Include any other ways you measure group membership ## Subprojects New in 2021: - [kube scheduler simulator](https://github.com/kubernetes-sigs/kube-scheduler-simulator) - Retired in 2021: - None - Continuing: - [Descheduler](https://github.com/kubernetes-sigs/descheduler) - [Scheduler Plugins](https://github.com/kubernetes-sigs/scheduler-plugins) - [Cluster Capacity](https://github.com/kubernetes-sigs/cluster-capacity) - [Poseidon](https://github.com/kubernetes-sigs/poseidon) - [KubeBatch](https://github.com/kubernetes-sigs/kube-batch) ## Working groups New in 2021: - [Structured Logging](https://github.com/kubernetes/community/tree/master/wg-structured-logging) Retired in 2021: - None - Continuing: - [Policy](https://github.com/kubernetes/community/tree/master/wg-policy) - [Multitenancy](https://github.com/kubernetes/community/tree/master/wg-multitenancy) ## Operational Operational tasks in [sig-governance.md]: - [X] [README.md] reviewed for accuracy and updated if needed - [X] [CONTRIBUTING.md] reviewed for accuracy and updated if needed (or created if missing and your contributor steps and experience are different or more in-depth than the documentation listed in the general [contributor guide] and [devel] folder.) - [x] Subprojects list and linked OWNERS files in [sigs.yaml] reviewed for accuracy and updated if needed - [X] SIG leaders (chairs, tech leads, and subproject owners) in [sigs.yaml] are accurate and active, and updated if needed - [X] Meeting notes and recordings for 2021 are linked from [README.md] and updated/uploaded if needed - [x] Did you have community-wide updates in 2021 (e.g. community meetings, kubecon, or kubernetes-dev@ emails)? Links to email, slides, or recordings: - [2021 KubeCon EU: SIG-Scheduling Intro & Deep Dive](https://sched.co/iE7P) - [2021 KubeCon NA: SIG-Scheduling Intro & Deep Dive](https://sched.co/lV8m) [CONTRIBUTING.md]: https://git.k8s.io/community/sig-scheduling/CONTRIBUTING.md [contributor ladder]: https://git.k8s.io/community/community-membership.md [sig-governance.md]: https://git.k8s.io/community/committee-steering/governance/sig-governance.md [README.md]: https://git.k8s.io/community/sig-scheduling/README.md [sigs.yaml]: https://git.k8s.io/community/sigs.yaml [contributor guide]: https://git.k8s.io/community/contributors/guide/README.md [devel]: https://git.k8s.io/community/contributors/devel/README.md