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  1. IL-0148 A kube-scheduler regression in Kubernetes v1.27.14, v1.28.10 and v1.29.5 made the scheduler panic on a pod whose node affinity named a nonexistent node, so no pods were scheduled on affected AKS clusters
    Microsoft2024
    Symptoms

    On AKS clusters running Kubernetes v1.27.14, v1.28.10 or v1.29.5, kube-scheduler panicked whenever the cluster contained a pod with a bad node affinity, and from then on no pod in the cluster was scheduled.

    Pods Pending
    Trigger

    A pod in the cluster with a required node affinity whose matchFields term names a node that does not exist.

    Root cause
    Software defect
    Component
    Pod scheduling and placement
    Contributing factor
    –
    Detection

    The AKS team found the bug; the issue does not say how.

    Remediation
    • AKS engineers fixed the impacted clusters
    • Rolled out a fixed kube-scheduler to all regions, applied to clusters automatically
    View case
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This case involves Pod scheduling and placement. kubegap audits a Kubernetes cluster for gaps like these, read-only, from Claude Code or Codex; its checks cite public reports like the ones in this library.

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By root cause1

Software defect1 case

Component
Pod scheduling and placement
Contributing factor
–
Organisation
Microsoft
  1. IL-0148 A kube-scheduler regression in Kubernetes v1.27.14, v1.28.10 and v1.29.5 made the scheduler panic on a pod whose node affinity named a nonexistent node, so no pods were scheduled on affected AKS clusters
    Microsoft2024