How to fix Kubelet CPU manager error in Kubernetes

KubernetesADVANCEDMEDIUM

This error occurs when the kubelet CPU manager fails to allocate or manage CPUs, typically due to misconfiguration or topology issues.

What this error means

The "Kubelet CPU manager error" indicates that the kubelet CPU manager cannot properly allocate CPUs to containers.

1Check CPU manager policy

cat /var/lib/kubelet/cpu_manager_state | head

2Check kubelet logs

journalctl -u kubelet | grep -i cpu

3Update policy

Edit /etc/kubernetes/kubelet.conf: cpuManagerPolicy

4Check topology

lstopo-no-graphics || lscpu

Restart kubelet

CPU manager policies: none (default), static. Static requires resource requests.