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        # 使用主机的PID
      hostIPC: true        # 使用主机的IPC
      hostNetwork: true    # 使用主机的网络
      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  # 是否开启 NodeLocal 模式，将采集分散到各个节点
        [[inputs.kubernetesprometheus.instances]]
            role       = "service"     # 必填 可以配置为 service、pod、endpoints、node
            namespaces = ["monitor-sa"]    # 非必填，支持配置多个，以逗号隔开，为空会匹配所有
            selector   = ""       # 非必填，被采集资源的labels，用来匹配选择需要采集的对象 ，为空会匹配所有

            scrape     = "true"            # 非必需 采集开关，默认true，
            scheme     = "http" 
            port       = "__kubernetes_service_port_%s_port " 
            path       = "/metrics"        # 非必填 大部分prometheus采集路径都为/metrics，具体以被采集服务实际指标地址为准
            params     = ""                # 非必填 http 访问参数，是一个字符串，例如 name=nginx&package=middleware，非必需
            interval   = "30s"             # 非必填 采集频率，默认30s

            [inputs.kubernetesprometheus.instances.custom]
              measurement        = "kube_nodeexporter"       #非必填 观测云指标名，默认使用指标下划线第一个字母
              job_as_measurement = false             #非必填 是否使用数据中的 job 标签值当做指标集名
              [inputs.kubernetesprometheus.instances.custom.tags]
                instance         = "__kubernetes_mate_instance"    #可选 指标tag
                host             = "__kubernetes_mate_host"        #可选 指标tag
                pod_name         = "__kubernetes_pod_name"         #可选 指标tag
                pod_namespace    = "__kubernetes_pod_namespace"    #可选 指标tag，可以继续新增，这里不继承全局tag和选举tag
                cluster          = "cluster01"                     #可选

- 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