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Merge pull request #761 from syseleven/inodes-alert
Add inodes alert
2 parents f2b5aab + faf83e3 commit 62ad10f

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‎alerts/storage_alerts.libsonnet

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@@ -66,6 +66,56 @@
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summary: 'PersistentVolume is filling up.',
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},
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},
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{
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alert: 'KubePersistentVolumeInodesFillingUp',
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expr: |||
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(
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kubelet_volume_stats_inodes_free{%(prefixedNamespaceSelector)s%(kubeletSelector)s}
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/
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kubelet_volume_stats_inodes{%(prefixedNamespaceSelector)s%(kubeletSelector)s}
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) < 0.03
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and
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kubelet_volume_stats_inodes_used{%(prefixedNamespaceSelector)s%(kubeletSelector)s} > 0
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unless on(namespace, persistentvolumeclaim)
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kube_persistentvolumeclaim_access_mode{%(prefixedNamespaceSelector)s access_mode="ReadOnlyMany"} == 1
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unless on(namespace, persistentvolumeclaim)
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kube_persistentvolumeclaim_labels{%(prefixedNamespaceSelector)s%(pvExcludedSelector)s} == 1
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||| % $._config,
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'for': '1m',
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labels: {
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severity: 'critical',
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},
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annotations: {
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description: 'The PersistentVolume claimed by {{ $labels.persistentvolumeclaim }} in Namespace {{ $labels.namespace }} only has {{ $value | humanizePercentage }} free inodes.',
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summary: 'PersistentVolumeInodes are filling up.',
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},
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},
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{
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alert: 'KubePersistentVolumeInodesFillingUp',
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expr: |||
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(
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kubelet_volume_stats_inodes_free{%(prefixedNamespaceSelector)s%(kubeletSelector)s}
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/
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kubelet_volume_stats_inodes{%(prefixedNamespaceSelector)s%(kubeletSelector)s}
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) < 0.15
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and
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kubelet_volume_stats_inodes_used{%(prefixedNamespaceSelector)s%(kubeletSelector)s} > 0
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and
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predict_linear(kubelet_volume_stats_inodes_free{%(prefixedNamespaceSelector)s%(kubeletSelector)s}[%(volumeFullPredictionSampleTime)s], 4 * 24 * 3600) < 0
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unless on(namespace, persistentvolumeclaim)
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kube_persistentvolumeclaim_access_mode{%(prefixedNamespaceSelector)s access_mode="ReadOnlyMany"} == 1
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unless on(namespace, persistentvolumeclaim)
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kube_persistentvolumeclaim_labels{%(prefixedNamespaceSelector)s%(pvExcludedSelector)s} == 1
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||| % $._config,
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'for': '1h',
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labels: {
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severity: 'warning',
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},
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annotations: {
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description: 'Based on recent sampling, the PersistentVolume claimed by {{ $labels.persistentvolumeclaim }} in Namespace {{ $labels.namespace }} is expected to run out of inodes within four days. Currently {{ $value | humanizePercentage }} of its inodes are free.',
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summary: 'PersistentVolumeInodes are filling up.',
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},
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},
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{
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alert: 'KubePersistentVolumeErrors',
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expr: |||

‎tests.yaml

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@@ -5,6 +5,7 @@ rule_files:
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evaluation_interval: 1m
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tests:
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# PersistentVolume disk space
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- interval: 1m
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input_series:
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- series: 'kubelet_volume_stats_available_bytes{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
@@ -199,6 +200,201 @@ tests:
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- eval_time: 61m
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alertname: KubePersistentVolumeFillingUp
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# PersistentVolume inodes
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- interval: 1m
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input_series:
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- series: 'kubelet_volume_stats_inodes_free{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '1024 512 64 16'
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- series: 'kubelet_volume_stats_inodes{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '1024 1024 1024 1024'
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- series: 'kubelet_volume_stats_inodes_used{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '16 64 512 1024'
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- series: 'kube_persistentvolumeclaim_access_mode{job="ksm",namespace="monitoring",persistentvolumeclaim="somepvc", access_mode="ReadWriteOnce", service="kube-state-metrics"}'
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values: '1 1 1 1'
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alert_rule_test:
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- eval_time: 1m
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alertname: KubePersistentVolumeInodesFillingUp
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- eval_time: 2m
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alertname: KubePersistentVolumeInodesFillingUp
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- eval_time: 3m
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alertname: KubePersistentVolumeInodesFillingUp
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- eval_time: 4m
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alertname: KubePersistentVolumeInodesFillingUp
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exp_alerts:
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- exp_labels:
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job: kubelet
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namespace: monitoring
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persistentvolumeclaim: somepvc
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severity: critical
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exp_annotations:
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summary: "PersistentVolumeInodes are filling up."
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description: 'The PersistentVolume claimed by somepvc in Namespace monitoring only has 1.562% free inodes.'
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runbook_url: https://github.com/kubernetes-monitoring/kubernetes-mixin/tree/master/runbook.md#alert-name-kubepersistentvolumeinodesfillingup
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# Don't alert when PVC access_mode is ReadOnlyMany
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- interval: 1m
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input_series:
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- series: 'kubelet_volume_stats_inodes_free{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '1024 512 64 16'
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- series: 'kubelet_volume_stats_inodes{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '1024 1024 1024 1024'
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- series: 'kubelet_volume_stats_inodes_used{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '16 64 512 1024'
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- series: 'kube_persistentvolumeclaim_access_mode{job="ksm",namespace="monitoring",persistentvolumeclaim="somepvc", access_mode="ReadOnlyMany", service="kube-state-metrics"}'
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values: '1 1 1 1'
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alert_rule_test:
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- eval_time: 1m
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alertname: KubePersistentVolumeInodesFillingUp
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- eval_time: 2m
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alertname: KubePersistentVolumeInodesFillingUp
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- eval_time: 3m
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alertname: KubePersistentVolumeInodesFillingUp
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- eval_time: 4m
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alertname: KubePersistentVolumeInodesFillingUp
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# Block volume mounts can report 0 for the kubelet_volume_stats_inodes_used metric but it shouldn't trigger the KubePersistentVolumeInodesFillingUp alert.
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# See https://github.com/kubernetes/kubernetes/commit/b997e0e4d6ccbead435a47d6ac75b0db3d17252f for details.
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- interval: 1m
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input_series:
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- series: 'kubelet_volume_stats_inodes_free{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '1024 512 64 16'
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- series: 'kubelet_volume_stats_inodes{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '1024 1024 1024 1024'
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- series: 'kubelet_volume_stats_inodes_used{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '0 0 0 0'
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alert_rule_test:
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- eval_time: 1m
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alertname: KubePersistentVolumeInodesFillingUp
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- eval_time: 2m
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alertname: KubePersistentVolumeInodesFillingUp
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- eval_time: 3m
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alertname: KubePersistentVolumeInodesFillingUp
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- eval_time: 4m
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alertname: KubePersistentVolumeInodesFillingUp
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# Don't alert when PVC has been labelled as fully utilised
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- interval: 1m
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input_series:
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- series: 'kubelet_volume_stats_inodes_free{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '1024 512 64 16'
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- series: 'kubelet_volume_stats_inodes{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '1024 1024 1024 1024'
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- series: 'kubelet_volume_stats_inodes_used{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '16 64 512 1024'
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- series: 'kube_persistentvolumeclaim_access_mode{job="ksm",namespace="monitoring",persistentvolumeclaim="somepvc", access_mode="ReadWriteOnce", service="kube-state-metrics"}'
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values: '1 1 1 1'
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- series: 'kube_persistentvolumeclaim_labels{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc",label_excluded_from_alerts="true"}'
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values: '1 1 1 1'
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alert_rule_test:
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- eval_time: 1m
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alertname: KubePersistentVolumeInodesFillingUp
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- eval_time: 2m
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alertname: KubePersistentVolumeInodesFillingUp
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- eval_time: 3m
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alertname: KubePersistentVolumeInodesFillingUp
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- eval_time: 4m
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alertname: KubePersistentVolumeInodesFillingUp
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- interval: 1m
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input_series:
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- series: 'kubelet_volume_stats_inodes_free{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '1024-10x61'
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- series: 'kubelet_volume_stats_inodes{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '32768+0x61'
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- series: 'kubelet_volume_stats_inodes_used{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '1024+10x61'
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alert_rule_test:
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- eval_time: 1h
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alertname: KubePersistentVolumeInodesFillingUp
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exp_alerts:
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- exp_labels:
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job: kubelet
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namespace: monitoring
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persistentvolumeclaim: somepvc
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severity: critical
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exp_annotations:
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summary: "PersistentVolumeInodes are filling up."
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description: 'The PersistentVolume claimed by somepvc in Namespace monitoring only has 1.294% free inodes.'
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runbook_url: https://github.com/kubernetes-monitoring/kubernetes-mixin/tree/master/runbook.md#alert-name-kubepersistentvolumeinodesfillingup
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- interval: 1m
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input_series:
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- series: 'kubelet_volume_stats_inodes_free{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '1024-10x61'
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- series: 'kubelet_volume_stats_inodes{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '32768+0x61'
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- series: 'kubelet_volume_stats_inodes_used{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '1024+10x61'
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- series: 'kube_persistentvolumeclaim_access_mode{job="ksm",namespace="monitoring",persistentvolumeclaim="somepvc", access_mode="ReadWriteOnce", service="kube-state-metrics"}'
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values: '1x61'
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alert_rule_test:
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- eval_time: 61m
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alertname: KubePersistentVolumeInodesFillingUp
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exp_alerts:
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- exp_labels:
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job: kubelet
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namespace: monitoring
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persistentvolumeclaim: somepvc
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severity: warning
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exp_annotations:
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summary: "PersistentVolumeInodes are filling up."
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description: 'Based on recent sampling, the PersistentVolume claimed by somepvc in Namespace monitoring is expected to run out of inodes within four days. Currently 1.263% of its inodes are free.'
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runbook_url: https://github.com/kubernetes-monitoring/kubernetes-mixin/tree/master/runbook.md#alert-name-kubepersistentvolumeinodesfillingup
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- exp_labels:
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job: kubelet
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namespace: monitoring
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persistentvolumeclaim: somepvc
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severity: critical
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exp_annotations:
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summary: "PersistentVolumeInodes are filling up."
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description: 'The PersistentVolume claimed by somepvc in Namespace monitoring only has 1.263% free inodes.'
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runbook_url: https://github.com/kubernetes-monitoring/kubernetes-mixin/tree/master/runbook.md#alert-name-kubepersistentvolumeinodesfillingup
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# Block volume mounts can report 0 for the kubelet_volume_stats_inodes_used metric but it shouldn't trigger the KubePersistentVolumeInodesFillingUp alert.
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# See https://github.com/kubernetes/kubernetes/commit/b997e0e4d6ccbead435a47d6ac75b0db3d17252f for details.
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- interval: 1m
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input_series:
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- series: 'kubelet_volume_stats_inodes_free{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '1024-10x61'
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- series: 'kubelet_volume_stats_inodes{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '32768+0x61'
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- series: 'kubelet_volume_stats_inodes_used{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '0x61'
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alert_rule_test:
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- eval_time: 61m
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alertname: KubePersistentVolumeInodesFillingUp
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# Don't alert when PVC access_mode is ReadOnlyMany
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- interval: 1m
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input_series:
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- series: 'kubelet_volume_stats_inodes_free{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '1024-10x61'
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- series: 'kubelet_volume_stats_inodes{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '32768+0x61'
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- series: 'kubelet_volume_stats_used_bytes{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '1x61'
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- series: 'kube_persistentvolumeclaim_access_mode{job="ksm",namespace="monitoring",persistentvolumeclaim="somepvc", access_mode="ReadOnlyMany", service="kube-state-metrics"}'
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values: '1x61'
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alert_rule_test:
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- eval_time: 61m
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alertname: KubePersistentVolumeInodesFillingUp
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- interval: 1m
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input_series:
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- series: 'kubelet_volume_stats_inodes_free{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '1024-10x61'
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- series: 'kubelet_volume_stats_capacity_bytes{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '32768+0x61'
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- series: 'kubelet_volume_stats_used_bytes{job="kubelet",namespace="monitoring",persistentvolumeclaim="somepvc"}'
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values: '1024+10x61'
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- series: 'kube_persistentvolumeclaim_access_mode{job="ksm",namespace="monitoring",persistentvolumeclaim="somepvc", access_mode="ReadWriteOnce", service="kube-state-metrics"}'
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values: '1x61'
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- series: 'kube_persistentvolumeclaim_labels{job="ksm",namespace="monitoring",persistentvolumeclaim="somepvc",label_excluded_from_alerts="true"}'
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values: '1x61'
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alert_rule_test:
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- eval_time: 61m
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alertname: KubePersistentVolumeInodesFillingUp
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- interval: 1m
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input_series:
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- series: 'kube_node_status_capacity{resource="pods",instance="172.17.0.5:8443",node="minikube",job="kube-state-metrics", namespace="kube-system"}'

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