{{- /*
Generated from 'kubernetes-system-apiserver' group from https://raw.githubusercontent.com/prometheus-operator/kube-prometheus/main/manifests/kubernetes-prometheusRule.yaml
Do not change in-place! In order to change this file first read following link:
https://github.com/prometheus-community/helm-charts/tree/main/charts/kube-prometheus-stack/hack
*/ -}}
{{- $kubeTargetVersion := default .Capabilities.KubeVersion.GitVersion .Values.kubeTargetVersionOverride }}
{{- if and (semverCompare ">=1.14.0-0" $kubeTargetVersion) (semverCompare "<9.9.9-9" $kubeTargetVersion) .Values.defaultRules.create .Values.defaultRules.rules.kubernetesSystem }}
apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: {{ printf "%s-%s" (include "kube-prometheus-stack.fullname" .) "kubernetes-system-apiserver" | trunc 63 | trimSuffix "-" }}
  namespace: {{ template "kube-prometheus-stack.namespace" . }}
  labels:
    app: {{ template "kube-prometheus-stack.name" . }}
{{ include "kube-prometheus-stack.labels" . | indent 4 }}
{{- if .Values.defaultRules.labels }}
{{ toYaml .Values.defaultRules.labels | indent 4 }}
{{- end }}
{{- if .Values.defaultRules.annotations }}
  annotations:
{{ toYaml .Values.defaultRules.annotations | indent 4 }}
{{- end }}
spec:
  groups:
  - name: kubernetes-system-apiserver
    rules:
    - alert: KubeClientCertificateExpiration
      annotations:
        description: A client certificate used to authenticate to the apiserver is expiring in less than 7.0 days.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-kubeclientcertificateexpiration
        summary: Client certificate is about to expire.
      expr: apiserver_client_certificate_expiration_seconds_count{job="apiserver"} > 0 and on(job) histogram_quantile(0.01, sum by (job, le) (rate(apiserver_client_certificate_expiration_seconds_bucket{job="apiserver"}[5m]))) < 604800
      labels:
        severity: warning
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: KubeClientCertificateExpiration
      annotations:
        description: A client certificate used to authenticate to the apiserver is expiring in less than 24.0 hours.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-kubeclientcertificateexpiration
        summary: Client certificate is about to expire.
      expr: apiserver_client_certificate_expiration_seconds_count{job="apiserver"} > 0 and on(job) histogram_quantile(0.01, sum by (job, le) (rate(apiserver_client_certificate_expiration_seconds_bucket{job="apiserver"}[5m]))) < 86400
      labels:
        severity: critical
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: AggregatedAPIErrors
      annotations:
        description: An aggregated API {{`{{`}} $labels.name {{`}}`}}/{{`{{`}} $labels.namespace {{`}}`}} has reported errors. It has appeared unavailable {{`{{`}} $value | humanize {{`}}`}} times averaged over the past 10m.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-aggregatedapierrors
        summary: An aggregated API has reported errors.
      expr: sum by(name, namespace)(increase(aggregator_unavailable_apiservice_total[10m])) > 4
      labels:
        severity: warning
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
{{- if semverCompare ">=1.18.0-0" $kubeTargetVersion }}
    - alert: AggregatedAPIDown
      annotations:
        description: An aggregated API {{`{{`}} $labels.name {{`}}`}}/{{`{{`}} $labels.namespace {{`}}`}} has been only {{`{{`}} $value | humanize {{`}}`}}% available over the last 10m.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-aggregatedapidown
        summary: An aggregated API is down.
      expr: (1 - max by(name, namespace)(avg_over_time(aggregator_unavailable_apiservice[10m]))) * 100 < 85
      for: 5m
      labels:
        severity: warning
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
{{- end }}
{{- if .Values.kubeApiServer.enabled }}
    - alert: KubeAPIDown
      annotations:
        description: KubeAPI has disappeared from Prometheus target discovery.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-kubeapidown
        summary: Target disappeared from Prometheus target discovery.
      expr: absent(up{job="apiserver"} == 1)
      for: 15m
      labels:
        severity: critical
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
{{- end }}
    - alert: KubeAPITerminatedRequests
      annotations:
        description: The apiserver has terminated {{`{{`}} $value | humanizePercentage {{`}}`}} of its incoming requests.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-kubeapiterminatedrequests
        summary: The apiserver has terminated {{`{{`}} $value | humanizePercentage {{`}}`}} of its incoming requests.
      expr: sum(rate(apiserver_request_terminations_total{job="apiserver"}[10m]))  / (  sum(rate(apiserver_request_total{job="apiserver"}[10m])) + sum(rate(apiserver_request_terminations_total{job="apiserver"}[10m])) ) > 0.20
      for: 5m
      labels:
        severity: warning
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
{{- end }}