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Update google-cadvisor.yml (#382)

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* Update google-cadvisor.yml

    Expression Explanation:
    The expression calculates the absolute change in CPU usage for containers by comparing the current rate of CPU usage (within the last 1 minute) with the rate of CPU usage from the previous minute. If this change exceeds 25%, the alert is triggered. Additionally, it compares the current rate of CPU usage with the rate from the previous 5 minutes to capture larger trends. If any of these conditions are met, the alert fires.
    
    Alert Details:
    - Alert Name: ContainerHighLowChangeCpuUsage
    - Trigger Condition: Absolute change in CPU usage exceeding 25%
    - Alert Severity: Informational (info)

* Add alert rule for high CPU usage change

* Change alert severity from warning to info

---------

Co-authored-by: Samuel Berthe <dev@samuel-berthe.fr>
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dzaczek 2025-02-16 23:46:53 +01:00 committed by GitHub
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commit 11a78f0f06
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4
_data/rules.yml
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@ -396,6 +396,10 @@ groups:
query: 'sum(increase(container_cpu_cfs_throttled_periods_total{container!=""}[5m])) by (container, pod, namespace) / sum(increase(container_cpu_cfs_periods_total[5m])) by (container, pod, namespace) > ( 25 / 100 )'
severity: warning
for: 5m
- name: Container high low change CPU usage
description: This alert rule monitors the absolute change in CPU usage within a time window and triggers an alert when the change exceeds 25%.
query: '(abs((sum by (instance, name) (rate(container_cpu_usage_seconds_total{name!=""}[1m])) * 100) - (sum by (instance, name) (rate(container_cpu_usage_seconds_total{name!=""}[1m] offset 1m)) * 100)) or abs((sum by (instance, name) (rate(container_cpu_usage_seconds_total{name!=""}[1m])) * 100) - (sum by (instance, name) (rate(container_cpu_usage_seconds_total{name!=""}[5m] offset 1m)) * 100))) > 25'
severity: info
- name: Container Low CPU utilization
description: Container CPU utilization is under 20% for 1 week. Consider reducing the allocated CPU.
query: '(sum(rate(container_cpu_usage_seconds_total{container!=""}[5m])) by (pod, container) / sum(container_spec_cpu_quota{container!=""}/container_spec_cpu_period{container!=""}) by (pod, container) * 100) < 20'

10
dist/rules/docker-containers/google-cadvisor.yml vendored
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@ -57,6 +57,16 @@ groups:
annotations:
summary: Container high throttle rate (instance {{ $labels.instance }})
description: "Container is being throttled\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: ContainerHighLowChangeCpuUsage
expr: '(abs(( sum by (instance, name) (rate(container_cpu_usage_seconds_total{name!=""}[1m])) * 100)- ( sum by (instance, name) (rate(container_cpu_usage_seconds_total{name!=""}[1m] offset 1m)) * 100)) or abs(( sum by (instance, name) (rate(container_cpu_usage_seconds_total{name!=""}[1m])) * 100)- ( sum by (instance, name) (rate(container_cpu_usage_seconds_total{name!=""}[5m] offset 1m)) * 100)) )>25'
for: 0m
labels:
severity: info
annotations:
summary: Container change CPU utilization (instance {{ $labels.instance }})
description: "This alert rule monitors the absolute change in CPU usage within a time window and triggers an alert when the change exceeds 25%.\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: ContainerLowCpuUtilization
expr: '(sum(rate(container_cpu_usage_seconds_total{container!=""}[5m])) by (pod, container) / sum(container_spec_cpu_quota{container!=""}/container_spec_cpu_period{container!=""}) by (pod, container) * 100) < 20'