# kube_prometheus_kubePrometheus-prometheusRule.yaml
apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  labels:
    app.kubernetes.io/component: exporter
    app.kubernetes.io/name: kube-prometheus
    app.kubernetes.io/part-of: kube-prometheus
    prometheus: k8s
    role: alert-rules
  name: kube-prometheus-rules
  namespace: monitoring
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 (cluster, job, namespace, service) / count(up) BY (cluster, job, namespace, service)) > 10
      for: 10m
      labels:
        severity: warning
    - alert: Watchdog
      annotations:
        description: |
          This is an alert meant to ensure that the entire alerting pipeline is functional.
          This alert is always firing, therefore it should always be firing in Alertmanager
          and always fire against a receiver. There are integrations with various notification
          mechanisms that send a notification when this alert is not firing. For example the
          "DeadMansSnitch" integration in PagerDuty.
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/general/watchdog
        summary: An alert that should always be firing to certify that Alertmanager is working properly.
      expr: vector(1)
      labels:
        severity: none
    - alert: InfoInhibitor
      annotations:
        description: |
          This is an alert that is used to inhibit info alerts.
          By themselves, the info-level alerts are sometimes very noisy, but they are relevant when combined with
          other alerts.
          This alert fires whenever there's a severity="info" alert, and stops firing when another alert with a
          severity of 'warning' or 'critical' starts firing on the same namespace.
          This alert should be routed to a null receiver and configured to inhibit alerts with severity="info".
        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/general/infoinhibitor
        summary: Info-level alert inhibition.
      expr: group by (namespace) (ALERTS{severity = "info"} == 1) unless on (namespace) group by (namespace) (ALERTS{alertname != "InfoInhibitor", alertstate = "firing", severity =~ "warning|critical"} == 1)
      labels:
        severity: none
  - 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