Bug 1817597
| Summary: | KubeCPUOvercommit and KubeMemOvercommit alerts can be triggered in two different scenarios. | ||
|---|---|---|---|
| Product: | OpenShift Container Platform | Reporter: | German Parente <gparente> |
| Component: | Monitoring | Assignee: | Pawel Krupa <pkrupa> |
| Status: | CLOSED ERRATA | QA Contact: | hongyan li <hongyli> |
| Severity: | low | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 4.3.0 | CC: | alegrand, anpicker, erooth, kakkoyun, lcosic, mloibl, pkrupa, spasquie, surbania |
| Target Milestone: | --- | ||
| Target Release: | 4.5.0 | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-07-13 17:23:46 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
|
Description
German Parente
2020-03-26 16:02:40 UTC
Description of problem:
There are two different scenarios for each of these alerts to be triggered: KubeCPUOvercommit and KubeMemOvercommit
Version-Release number of selected component (if applicable): ocp 3.11.Z / ocp 4.X
How reproducible: always
Additional info:
- alert: KubeCPUOvercommit
annotations:
message: Cluster has overcommitted CPU resource requests for Pods and cannot
tolerate node failure.
expr: |
sum(namespace:kube_pod_container_resource_requests_cpu_cores:sum)
/
sum(kube_node_status_allocatable_cpu_cores)
>
(count(kube_node_status_allocatable_cpu_cores)-1) / count(kube_node_status_allocatable_cpu_cores)
for: 5m
labels:
severity: warning
- alert: KubeMemOvercommit
annotations:
message: Cluster has overcommitted memory resource requests for Pods and cannot
tolerate node failure.
expr: |
sum(namespace:kube_pod_container_resource_requests_memory_bytes:sum)
/
sum(kube_node_status_allocatable_memory_bytes)
>
(count(kube_node_status_allocatable_memory_bytes)-1)
/
count(kube_node_status_allocatable_memory_bytes)
for: 5m
labels:
severity: warning
- alert: KubeCPUOvercommit
annotations:
message: Cluster has overcommitted CPU resource requests for Namespaces.
expr: |
sum(kube_resourcequota{namespace=~"(openshift-.*|kube-.*|default|logging)",job="kube-state-metrics", type="hard", resource="cpu"})
/
sum(kube_node_status_allocatable_cpu_cores)
> 1.5
for: 5m
labels:
severity: warning
- alert: KubeMemOvercommit
annotations:
message: Cluster has overcommitted memory resource requests for Namespaces.
expr: |
sum(kube_resourcequota{namespace=~"(openshift-.*|kube-.*|default|logging)",job="kube-state-metrics", type="hard", resource="memory"})
/
sum(kube_node_status_allocatable_memory_bytes{job="node-exporter"})
> 1.5
for: 5m
labels:
The first one seems to be more cluster wided and the second one related to quotas in namespaces.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:2409 |