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Bug 1881208: add alert for system.slice rss going over system-reserved #2033

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Merged
openshift-merge-robot merged 1 commit into from
Sep 21, 2020
Merged

Bug 1881208: add alert for system.slice rss going over system-reserved #2033

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9 changes: 9 additions & 0 deletions install/0000_90_machine-config-operator_01_prometheus-rules.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -43,3 +43,12 @@ spec:
severity: warning
annotations:
message: "Kubelet health failure threshold reached"
- name: system-memory-exceeds-reservation
rules:
- alert: SystemMemoryExceedsReservation
expr: |
sum by (node) (container_memory_rss{id="/system.slice"}) > ((sum by (node) (kube_node_status_capacity{resource="memory"} - kube_node_status_allocatable{resource="memory"})) * 0.9)
labels:
severity: warning
annotations:
message: "System memory usage of {{ $value | humanize }} on {{ $labels.node }} exceeds 90% 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 reservation may be increased (https://docs.openshift.com/container-platform/latest/nodes/nodes/nodes-nodes-managing.html) when running nodes with high numbers of pods."