{{- $Values := (.helm).Values | default .Values }}
{{- $runbookUrl := ($Values.defaultRules).runbookUrl | default "https://runbooks.prometheus-operator.dev/runbooks" }}
{{- $clusterLabel := ($Values.global).clusterLabel | default "cluster" }}
{{- $additionalGroupByLabels := append $Values.defaultRules.additionalGroupByLabels $clusterLabel }}
{{- $groupLabels := join "," $additionalGroupByLabels }}
{{- $grafanaHost := ternary (index (($Values.grafana).ingress).hosts 0) (($Values.external).grafana).host ($Values.grafana).enabled }}
condition: '{{ true }}'
name: kube-state-metrics
rules:
- alert: KubeStateMetricsListErrors
  annotations:
    description: 'kube-state-metrics is experiencing errors at an elevated rate in list operations. This is likely causing it to not be able to expose metrics about Kubernetes objects correctly or at all.'
    runbook_url: '{{ $runbookUrl }}/kube-state-metrics/kubestatemetricslisterrors'
    summary: 'kube-state-metrics is experiencing errors in list operations.'
  condition: '{{ true }}'
  expr: |-
    (sum(rate(kube_state_metrics_list_total{job="kube-state-metrics",result="error"}[5m])) by ({{ $groupLabels }})
      /
    sum(rate(kube_state_metrics_list_total{job="kube-state-metrics"}[5m])) by ({{ $groupLabels }}))
    > 0.01
  for: 15m
  labels:
    severity: critical
- alert: KubeStateMetricsWatchErrors
  annotations:
    description: 'kube-state-metrics is experiencing errors at an elevated rate in watch operations. This is likely causing it to not be able to expose metrics about Kubernetes objects correctly or at all.'
    runbook_url: '{{ $runbookUrl }}/kube-state-metrics/kubestatemetricswatcherrors'
    summary: 'kube-state-metrics is experiencing errors in watch operations.'
  condition: '{{ true }}'
  expr: |-
    (sum(rate(kube_state_metrics_watch_total{job="kube-state-metrics",result="error"}[5m])) by ({{ $groupLabels }})
      /
    sum(rate(kube_state_metrics_watch_total{job="kube-state-metrics"}[5m])) by ({{ $groupLabels }}))
    > 0.01
  for: 15m
  labels:
    severity: critical
- alert: KubeStateMetricsShardingMismatch
  annotations:
    description: 'kube-state-metrics pods are running with different --total-shards configuration, some Kubernetes objects may be exposed multiple times or not exposed at all.'
    runbook_url: '{{ $runbookUrl }}/kube-state-metrics/kubestatemetricsshardingmismatch'
    summary: 'kube-state-metrics sharding is misconfigured.'
  condition: '{{ true }}'
  expr: stdvar (kube_state_metrics_total_shards{job="kube-state-metrics"}) by ({{ $groupLabels }}) != 0
  for: 15m
  labels:
    severity: critical
- alert: KubeStateMetricsShardsMissing
  annotations:
    description: 'kube-state-metrics shards are missing, some Kubernetes objects are not being exposed.'
    runbook_url: '{{ $runbookUrl }}/kube-state-metrics/kubestatemetricsshardsmissing'
    summary: 'kube-state-metrics shards are missing.'
  condition: '{{ true }}'
  expr: |-
    2^max(kube_state_metrics_total_shards{job="kube-state-metrics"}) by ({{ $groupLabels }}) - 1
      -
    sum( 2 ^ max by (shard_ordinal,{{ $groupLabels }}) (kube_state_metrics_shard_ordinal{job="kube-state-metrics"}) ) by ({{ $groupLabels }})
    != 0
  for: 15m
  labels:
    severity: critical
