annual-report-2025.md

2025 Annual Report: SIG Instrumentation

Current initiatives and Project Health

1. What work did the SIG do this year that should be highlighted?

• Han Kang (logicalhan) stepped down as chair, Richa Banker (richabanker) added as new chair
• 2025 Contributor Awards:
  • Yongrui Lin (yongruilin)
• KEPs that moved forward
  • API Server Tracing graduated to GA
  • Kubelet Tracing graduated to GA
• Announced deprecations
  • Prometheus Adapter deprecation announced

2. Are there any areas and/or subprojects that your group needs help with (e.g. fewer than 2 active OWNERS)?

• kubernetes/kube-state-metrics
• kubernetes-sigs/custom-metrics-apiserver
• kubernetes-sigs/metrics-server

3. Did you have community-wide updates in 2025 (e.g. KubeCon talks)?

• SIG Instrumentation Introduction and Deep Dive (KubeCon EU '25)
• SIG Instrumentation Introduction and Deep Dive (KubeCon NA '25)

4. KEP work in 2025 (v1.33, v1.34, v1.35):

• Stable
  • 2831 - Kubelet OpenTelemetry Tracing - v1.34
  • 647 - APIServer Tracing - v1.34
• Beta
  • 3077 - Contextual Logging more packages (e.g. kubelet components and some client-go packages) were migrated to contextual logging
  • 5270 - Graduate custom.metrics.k8s.io to stable
  • 5271 - Graduate external.metrics.k8s.io to stable
• Alpha
  • 4827 - ComponentStatusz converted to a versioned structured API
  • 4828 - ComponentFlagz converted to a versioned structured API

Subprojects

New in 2025:

• resource-state-metrics Continuing:
• custom-metrics-apiserver
• instrumentation
• instrumentation-addons
• instrumentation-tools
• klog
• kube-state-metrics
• metric-stability-framework
• metrics
• metrics-server
• prometheus-adapter
• structured-logging
• usage-metrics-collector

Working groups

Continuing:

• Serving
• Structured Logging

Operational

Operational tasks in sig-governance.md:

• README.md reviewed for accuracy and updated if needed
• CONTRIBUTING.md reviewed for accuracy and updated if needed
• Other contributing docs (e.g. in devel dir or contributor guide) reviewed for accuracy and updated if needed
• Subprojects list and linked OWNERS files in sigs.yaml reviewed for accuracy and updated if needed
• SIG leaders (chairs, tech leads, and subproject leads) in sigs.yaml are accurate and active, and updated if needed
• Meeting notes and recordings for 2025 are linked from README.md and updated/uploaded if needed