{{ if .Values.nfc_monitoring.kube_monitor_proxy.enabled }}
---
apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  labels:
    app.kubernetes.io/component: exporter
    app.kubernetes.io/instance: {{ $.Release.Name }}
    app.kubernetes.io/name: kube-prometheus
    app.kubernetes.io/part-of: {{ $.Chart.Name }}
    app.kubernetes.io/version: {{ $.Chart.Version }}
    app.kubernetes.io/managed-by: {{ $.Release.Service }}
    prometheus: {{ $.Release.Name }}
    role: alert-rules
  name: kube-prometheus-rules
  namespace: {{ .Values.nfc_monitoring.prometheus.namespace }}
spec:
  groups:
  - name: general.rules
    rules:
    - alert: TargetDown
      annotations:
        description: '{{ `{{` }} printf "%.4g" $value }}% of the {{ `{{` }} $labels.job }}/{{ `{{` }} $labels.service }} targets in {{ `{{` }} $labels.namespace }} namespace are down.'
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/general/targetdown
        summary: One or more targets are unreachable.
      expr: 100 * (count(up == 0) BY (job, namespace, service) / count(up) BY (job, namespace, service)) > 10
      for: 10m
      labels:
        severity: warning
  - name: node-network
    rules:
    - alert: NodeNetworkInterfaceFlapping
      annotations:
        description: Network interface "{{ `{{` }} $labels.device }}" changing its up status often on node-exporter {{ `{{` }} $labels.namespace }}/{{ `{{` }} $labels.pod }}
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/general/nodenetworkinterfaceflapping
        summary: Network interface is often changing its status
      expr: |
        changes(node_network_up{job="node-exporter",device!~"veth.+"}[2m]) > 2
      for: 2m
      labels:
        severity: warning
  - name: kube-prometheus-node-recording.rules
    rules:
    - expr: sum(rate(node_cpu_seconds_total{mode!="idle",mode!="iowait",mode!="steal"}[3m])) BY (instance)
      record: instance:node_cpu:rate:sum
    - expr: sum(rate(node_network_receive_bytes_total[3m])) BY (instance)
      record: instance:node_network_receive_bytes:rate:sum
    - expr: sum(rate(node_network_transmit_bytes_total[3m])) BY (instance)
      record: instance:node_network_transmit_bytes:rate:sum
    - expr: sum(rate(node_cpu_seconds_total{mode!="idle",mode!="iowait",mode!="steal"}[5m])) WITHOUT (cpu, mode) / ON(instance) GROUP_LEFT() count(sum(node_cpu_seconds_total) BY (instance, cpu)) BY (instance)
      record: instance:node_cpu:ratio
    - expr: sum(rate(node_cpu_seconds_total{mode!="idle",mode!="iowait",mode!="steal"}[5m]))
      record: cluster:node_cpu:sum_rate5m
    - expr: cluster:node_cpu:sum_rate5m / count(sum(node_cpu_seconds_total) BY (instance, cpu))
      record: cluster:node_cpu:ratio
  - name: kube-prometheus-general.rules
    rules:
    - expr: count without(instance, pod, node) (up == 1)
      record: count:up1
    - expr: count without(instance, pod, node) (up == 0)
      record: count:up0

{{ end }}