{{- /*
Generated from 'alertmanager.rules' group from https://raw.githubusercontent.com/prometheus-operator/kube-prometheus/main/manifests/alertmanager-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.alertmanager }}
{{- $alertmanagerJob := printf "%s-%s" (include "kube-prometheus-stack.fullname" .) "alertmanager" }}
{{- $namespace := printf "%s" (include "kube-prometheus-stack.namespace" .) }}
apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: {{ printf "%s-%s" (include "kube-prometheus-stack.fullname" .) "alertmanager.rules" | 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: alertmanager.rules
    rules:
    - alert: AlertmanagerFailedReload
      annotations:
        description: Configuration has failed to load for {{`{{`}} $labels.namespace {{`}}`}}/{{`{{`}} $labels.pod{{`}}`}}.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-alertmanagerfailedreload
        summary: Reloading an Alertmanager configuration has failed.
      expr: |-
        # Without max_over_time, failed scrapes could create false negatives, see
        # https://www.robustperception.io/alerting-on-gauges-in-prometheus-2-0 for details.
        max_over_time(alertmanager_config_last_reload_successful{job="{{ $alertmanagerJob }}",namespace="{{ $namespace }}"}[5m]) == 0
      for: 10m
      labels:
        severity: critical
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: AlertmanagerMembersInconsistent
      annotations:
        description: Alertmanager {{`{{`}} $labels.namespace {{`}}`}}/{{`{{`}} $labels.pod{{`}}`}} has only found {{`{{`}} $value {{`}}`}} members of the {{`{{`}}$labels.job{{`}}`}} cluster.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-alertmanagermembersinconsistent
        summary: A member of an Alertmanager cluster has not found all other cluster members.
      expr: |-
        # Without max_over_time, failed scrapes could create false negatives, see
        # https://www.robustperception.io/alerting-on-gauges-in-prometheus-2-0 for details.
          max_over_time(alertmanager_cluster_members{job="{{ $alertmanagerJob }}",namespace="{{ $namespace }}"}[5m])
        < on (namespace,service) group_left
          count by (namespace,service) (max_over_time(alertmanager_cluster_members{job="{{ $alertmanagerJob }}",namespace="{{ $namespace }}"}[5m]))
      for: 15m
      labels:
        severity: critical
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: AlertmanagerFailedToSendAlerts
      annotations:
        description: Alertmanager {{`{{`}} $labels.namespace {{`}}`}}/{{`{{`}} $labels.pod{{`}}`}} failed to send {{`{{`}} $value | humanizePercentage {{`}}`}} of notifications to {{`{{`}} $labels.integration {{`}}`}}.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-alertmanagerfailedtosendalerts
        summary: An Alertmanager instance failed to send notifications.
      expr: |-
        (
          rate(alertmanager_notifications_failed_total{job="{{ $alertmanagerJob }}",namespace="{{ $namespace }}"}[5m])
        /
          rate(alertmanager_notifications_total{job="{{ $alertmanagerJob }}",namespace="{{ $namespace }}"}[5m])
        )
        > 0.01
      for: 5m
      labels:
        severity: warning
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: AlertmanagerClusterFailedToSendAlerts
      annotations:
        description: The minimum notification failure rate to {{`{{`}} $labels.integration {{`}}`}} sent from any instance in the {{`{{`}}$labels.job{{`}}`}} cluster is {{`{{`}} $value | humanizePercentage {{`}}`}}.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-alertmanagerclusterfailedtosendalerts
        summary: All Alertmanager instances in a cluster failed to send notifications to a critical integration.
      expr: |-
        min by (namespace,service, integration) (
          rate(alertmanager_notifications_failed_total{job="{{ $alertmanagerJob }}",namespace="{{ $namespace }}", integration=~`.*`}[5m])
        /
          rate(alertmanager_notifications_total{job="{{ $alertmanagerJob }}",namespace="{{ $namespace }}", integration=~`.*`}[5m])
        )
        > 0.01
      for: 5m
      labels:
        severity: critical
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: AlertmanagerClusterFailedToSendAlerts
      annotations:
        description: The minimum notification failure rate to {{`{{`}} $labels.integration {{`}}`}} sent from any instance in the {{`{{`}}$labels.job{{`}}`}} cluster is {{`{{`}} $value | humanizePercentage {{`}}`}}.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-alertmanagerclusterfailedtosendalerts
        summary: All Alertmanager instances in a cluster failed to send notifications to a non-critical integration.
      expr: |-
        min by (namespace,service, integration) (
          rate(alertmanager_notifications_failed_total{job="{{ $alertmanagerJob }}",namespace="{{ $namespace }}", integration!~`.*`}[5m])
        /
          rate(alertmanager_notifications_total{job="{{ $alertmanagerJob }}",namespace="{{ $namespace }}", integration!~`.*`}[5m])
        )
        > 0.01
      for: 5m
      labels:
        severity: warning
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: AlertmanagerConfigInconsistent
      annotations:
        description: Alertmanager instances within the {{`{{`}}$labels.job{{`}}`}} cluster have different configurations.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-alertmanagerconfiginconsistent
        summary: Alertmanager instances within the same cluster have different configurations.
      expr: |-
        count by (namespace,service) (
          count_values by (namespace,service) ("config_hash", alertmanager_config_hash{job="{{ $alertmanagerJob }}",namespace="{{ $namespace }}"})
        )
        != 1
      for: 20m
      labels:
        severity: critical
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: AlertmanagerClusterDown
      annotations:
        description: '{{`{{`}} $value | humanizePercentage {{`}}`}} of Alertmanager instances within the {{`{{`}}$labels.job{{`}}`}} cluster have been up for less than half of the last 5m.'
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-alertmanagerclusterdown
        summary: Half or more of the Alertmanager instances within the same cluster are down.
      expr: |-
        (
          count by (namespace,service) (
            avg_over_time(up{job="{{ $alertmanagerJob }}",namespace="{{ $namespace }}"}[5m]) < 0.5
          )
        /
          count by (namespace,service) (
            up{job="{{ $alertmanagerJob }}",namespace="{{ $namespace }}"}
          )
        )
        >= 0.5
      for: 5m
      labels:
        severity: critical
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: AlertmanagerClusterCrashlooping
      annotations:
        description: '{{`{{`}} $value | humanizePercentage {{`}}`}} of Alertmanager instances within the {{`{{`}}$labels.job{{`}}`}} cluster have restarted at least 5 times in the last 10m.'
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-alertmanagerclustercrashlooping
        summary: Half or more of the Alertmanager instances within the same cluster are crashlooping.
      expr: |-
        (
          count by (namespace,service) (
            changes(process_start_time_seconds{job="{{ $alertmanagerJob }}",namespace="{{ $namespace }}"}[10m]) > 4
          )
        /
          count by (namespace,service) (
            up{job="{{ $alertmanagerJob }}",namespace="{{ $namespace }}"}
          )
        )
        >= 0.5
      for: 5m
      labels:
        severity: critical
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
{{- end }}