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 (job, namespace, service) / count(up) BY (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: ALERTS{severity = "info"} == 1 unless on(namespace) ALERTS{alertname != "InfoInhibitor", severity =~ "warning|critical", alertstate="firing"} == 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
