roles/prometheus_ethtool_exporter/tasks/main.yml

- name: Deploy exporter
  kubernetes.core.k8s:
    state: present
    definition:
      - apiVersion: apps/v1
        kind: DaemonSet
        metadata:
          name: ethtool-exporter
          namespace: monitoring
          labels:
            application: ethtool-exporter
        spec:
          updateStrategy:
            rollingUpdate:
              maxUnavailable: 100%
          selector:
            matchLabels:
              application: ethtool-exporter
          template:
            metadata:
              labels:
                application: ethtool-exporter
                job: ethtool
            spec:
              hostNetwork: true
              terminationGracePeriodSeconds: 0
              containers:
                - name: ethtool-exporter
                  env:
                    - name: IP
                      valueFrom:
                        fieldRef:
                          fieldPath: status.podIP
                  image: quay.io/vexxhost/ethtool-exporter:{{ prometheus_ethtool_exporter_image_tag }}
                  args:
                    - "-L"
                    - "$(IP)"
                    - "-p"
                    - "9417"
                    - "-I"
                    - "(eth|em|eno|ens|enp)[0-9s]+"
                  ports:
                    - name: metrics
                      containerPort: 9417

      - apiVersion: monitoring.coreos.com/v1
        kind: PodMonitor
        metadata:
          name: ethtool-exporter
          namespace: monitoring
          labels:
            application: ethtool-exporter
            release: kube-prometheus-stack
        spec:
          jobLabel: job
          podMetricsEndpoints:
            - port: metrics
              path: /metrics
              relabelings:
                - sourceLabels: ["__meta_kubernetes_pod_node_name"]
                  targetLabel: instance
                - action: labeldrop
                  regex: ^(container|endpoint|namespace|pod)$
          selector:
            matchLabels:
              application: ethtool-exporter

      - apiVersion: monitoring.coreos.com/v1
        kind: PrometheusRule
        metadata:
          name: ethtool-exporter
          namespace: monitoring
          labels:
            application: ethtool-exporter
            release: kube-prometheus-stack
        spec:
          groups:
            - name: rules
              rules:
                - alert: EthernetReceiveDiscards
                  expr: rate(node_net_ethtool{type="rx_discards"}[1m]) > 0
                  labels:
                    severity: warning