---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: node-exporter
  namespace: monitoring
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: node-exporter
  namespace: monitoring
  labels:
    app: node-exporter
spec:
  selector:
    matchLabels:
      app: node-exporter
  template:
    metadata:
      labels:
        app: node-exporter
      annotations:
        prometheus.io/scrape: "true"
        prometheus.io/port: "9100"
    spec:
      serviceAccountName: node-exporter
      hostNetwork: true
      hostPID: true
      tolerations:
        - key: node-role.kubernetes.io/master
          operator: Exists
          effect: NoSchedule
        - key: node-role.kubernetes.io/control-plane
          operator: Exists
          effect: NoSchedule
      containers:
        - name: node-exporter
          image: prom/node-exporter:v1.7.0
          args:
            - "--path.procfs=/host/proc"
            - "--path.sysfs=/host/sys"
            - "--path.rootfs=/host/root"
            - "--web.listen-address=:9100"
            - "--collector.filesystem.mount-points-exclude=^/(dev|proc|sys|var/lib/docker/.+|var/lib/kubelet/.+)($|/)"
            - "--collector.netclass.ignored-devices=^(veth.*|cali.*|docker.*|flannel.*)$"
          ports:
            - name: metrics
              containerPort: 9100
              hostPort: 9100
              protocol: TCP
          resources:
            requests:
              memory: "20Mi"
              cpu: "10m"
            limits:
              memory: "50Mi"
              cpu: "100m"
          securityContext:
            runAsNonRoot: true
            runAsUser: 65534
          volumeMounts:
            - name: proc
              mountPath: /host/proc
              readOnly: true
            - name: sys
              mountPath: /host/sys
              readOnly: true
            - name: root
              mountPath: /host/root
              readOnly: true
              mountPropagation: HostToContainer
          livenessProbe:
            httpGet:
              path: /
              port: metrics
            initialDelaySeconds: 5
            periodSeconds: 15
          readinessProbe:
            httpGet:
              path: /
              port: metrics
            initialDelaySeconds: 5
            periodSeconds: 15
      volumes:
        - name: proc
          hostPath:
            path: /proc
        - name: sys
          hostPath:
            path: /sys
        - name: root
          hostPath:
            path: /
---
apiVersion: v1
kind: Service
metadata:
  name: node-exporter
  namespace: monitoring
  labels:
    app: node-exporter
  annotations:
    prometheus.io/scrape: "true"
    prometheus.io/port: "9100"
spec:
  type: ClusterIP
  clusterIP: None
  ports:
    - name: metrics
      port: 9100
      targetPort: 9100
      protocol: TCP
  selector:
    app: node-exporter