Node Exporter¶

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: node-exporter
  namespace: monitor-sa
  labels:
    name: node-exporter
spec:
  selector:
    matchLabels:
     name: node-exporter
  template:
    metadata:
      labels:
        name: node-exporter
    spec:
      hostPID: true        # Use the PID of the host
      hostIPC: true        # Use the host's IPC
      hostNetwork: true    # Use the host's network
      containers:
      - name: node-exporter
        image: quay.io/prometheus/node-exporter:v1.8.2
        ports:
        - containerPort: 9100
        resources:
          requests:
            cpu: 0.15
        securityContext:
          privileged: true
        args:
        - --path.procfs
        - /host/proc
        - --path.sysfs
        - /host/sys
        - --collector.filesystem.ignored-mount-points
        - '"^/(sys|proc|dev|host|etc)($|/)"'
        volumeMounts:
        - name: dev
          mountPath: /host/dev
        - name: proc
          mountPath: /host/proc
        - name: sys
          mountPath: /host/sys
        - name: rootfs
          mountPath: /rootfs
      tolerations:
      - key: "node-role.kubernetes.io/master"
        operator: "Exists"
        effect: "NoSchedule"
      volumes:
        - name: proc
          hostPath:
            path: /proc
        - name: dev
          hostPath:
            path: /dev
        - name: sys
          hostPath:
            path: /sys
        - name: rootfs
          hostPath:
            path: /

---

apiVersion: v1
kind: Service
metadata:
  name: node-exporter
  namespace: monitor-sa
spec:
  type: ClusterIP
  ports:
  - name: http
    port: 9100
    protocol: TCP
    targetPort: 31672
  selector:
    name: node-exporter

kubectl create ns monitor-sa
kubectl apply -f node-exporter.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: datakit-conf
  namespace: datakit
data:
    kubernetesprometheus.conf: |-
      [inputs.kubernetesprometheus]
        node_local = true  # Do you want to enable NodeLocal mode to distribute data collection to various nodes
        [[inputs.kubernetesprometheus.instances]]
            role       = "service"     # Required fields can be configured as service、pod、endpoints、node
            namespaces = ["monitor-sa"]
            selector   = ""

            scrape     = "true"
            scheme     = "http" 
            port       = "__kubernetes_service_port_%s_port " 
            path       = "/metrics"
            params     = ""
            interval   = "30s"

            [inputs.kubernetesprometheus.instances.custom]
              measurement        = "kube_nodeexporter"
              job_as_measurement = false
              [inputs.kubernetesprometheus.instances.custom.tags]
                instance         = "__kubernetes_mate_instance"    #Optional metric tag
                host             = "__kubernetes_mate_host"        #Optional metric tag
                pod_name         = "__kubernetes_pod_name"         #Optional metric tag
                pod_namespace    = "__kubernetes_pod_namespace"   #Optional metric tag
                cluster          = "cluster01"                    #Optional

- mountPath: /usr/local/datakit/conf.d/kubernetesprometheus/kubernetesprometheus.conf
  name: datakit-conf
  subPath: kubernetesprometheus.conf
  readOnly: true

kubectl delete -f datakit.yaml
kubectl apply -f datakit.yaml