ISAR Warning: SystemMemoryExceedsReservation

[DanielFroehlich]

System memory usage of 1.165G on Node
storm3
exceeds 95% of the reservation. Reserved memory ensures system processes can function even when the node is fully allocated and protects against workload out of memory events impacting the proper functioning of the node. The default reservation is expected to be sufficient for most configurations and should be increased (https://docs.openshift.com/container-platform/latest/nodes/nodes/nodes-nodes-managing.html) when running nodes with high numbers of pods (either due to rate of change or at steady state).

Runbook:
https://github.com/openshift/runbooks/blob/master/alerts/machine-config-operator/SystemMemoryExceedsReservation.md

[DanielFroehlich]

Strange, autoSizing is enabled:

oc get KubeletConfig/auto-sizing-reserved -o=yaml | grep auto

      {"apiVersion":"machineconfiguration.openshift.io/v1","kind":"KubeletConfig","metadata":{"annotations":{},"labels":{"app.kubernetes.io/instance":"cluster-configuration"},"name":"auto-sizing-reserved"},"spec":{"autoSizingReserved":true,"machineConfigPoolSelector":{"matchLabels":{"pools.operator.machineconfiguration.openshift.io/worker":""}}}}
  name: auto-sizing-reserved
  autoSizingReserved: true

Why isnt that working for storm3?

[DanielFroehlich]

KubeletConfig/set-max-pods seams also not to be in effect, looking at the /etc/kubernetes/kublet.conf on storm3
@rbo , I am not familiar enough with these MachineConfig selectors and how they stack up. Can you give me a hint here why this is not working?