---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: node-exporter
  namespace: monitoring
  labels:
    app: node-exporter
spec:
  selector:
    matchLabels:
      app: node-exporter
  updateStrategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 1
  template:
    metadata:
      labels:
        app: node-exporter
    spec:
      hostNetwork: true
      hostPID: true
      nodeSelector:
        kubernetes.io/os: linux
      tolerations:
      # Run on all nodes including master
      - operator: Exists
        effect: NoSchedule
      containers:
      - name: node-exporter
        image: quay.io/prometheus/node-exporter:v1.7.0
        args:
        - '--path.sysfs=/host/sys'
        - '--path.rootfs=/host/root'
        - '--path.procfs=/host/proc'
        - '--collector.filesystem.mount-points-exclude=^/(dev|proc|sys|var/lib/docker/.+|var/lib/kubelet/.+)($|/)'
        - '--collector.filesystem.fs-types-exclude=^(autofs|binfmt_misc|bpf|cgroup2?|configfs|debugfs|devpts|devtmpfs|fusectl|hugetlbfs|iso9660|mqueue|nsfs|overlay|proc|procfs|pstore|rpc_pipefs|securityfs|selinuxfs|squashfs|sysfs|tracefs)$'
        - '--collector.netclass.ignored-devices=^(veth.*|[a-f0-9]{15})$'
        - '--collector.netdev.device-exclude=^(veth.*|[a-f0-9]{15})$'
        - '--web.listen-address=:9100'
        ports:
        - containerPort: 9100
          protocol: TCP
          name: metrics
        resources:
          requests:
            memory: "64Mi"
            cpu: "50m"
          limits:
            memory: "128Mi"
            cpu: "200m"
        volumeMounts:
        - name: sys
          mountPath: /host/sys
          mountPropagation: HostToContainer
          readOnly: true
        - name: root
          mountPath: /host/root
          mountPropagation: HostToContainer
          readOnly: true
        - name: proc
          mountPath: /host/proc
          mountPropagation: HostToContainer
          readOnly: true
        securityContext:
          runAsNonRoot: true
          runAsUser: 65534
          capabilities:
            drop:
            - ALL
          readOnlyRootFilesystem: true
      volumes:
      - name: sys
        hostPath:
          path: /sys
      - name: root
        hostPath:
          path: /
      - name: proc
        hostPath:
          path: /proc

---
apiVersion: v1
kind: Service
metadata:
  name: node-exporter
  namespace: monitoring
  labels:
    app: node-exporter
  annotations:
    prometheus.io/scrape: "true"
    prometheus.io/port: "9100"
spec:
  clusterIP: None
  ports:
  - name: metrics
    port: 9100
    protocol: TCP
    targetPort: 9100
  selector:
    app: node-exporter