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
    spec:
      hostNetwork: true
      containers:
        - name: node-exporter
          image: prom/node-exporter:latest
          imagePullPolicy: Always
          args:
            - "--path.rootfs=/host"
          ports:
            - containerPort: 9100
              hostPort: 9100
              name: metrics
              protocol: TCP
          resources:
            requests:
              memory: "50Mi"
              cpu: "100m"
            limits:
              memory: "100Mi"
              cpu: "200m"
          volumeMounts:
            - name: host
              mountPath: /host
              readOnly: true
      volumes:
        - name: host
          hostPath:
            path: /
---
apiVersion: v1
kind: Service
metadata:
  name: node-exporter
  namespace: monitoring
spec:
  selector:
    app: node-exporter
  ports:
    - name: metrics
      port: 9100
      targetPort: metrics