Kubernetes中DaemonSet方式部署Node-Exporter以及Prometheus中抓取Node-Exporter

K8S中DaemonSet方式部署Node-Exporer配置文件

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: node-exporter
  namespace: monitoring
  labels:
    k8s-app: node-exporter
spec:
  selector:
    matchLabels:
        k8s-app: node-exporter
  template:
    metadata:
      labels:
        k8s-app: node-exporter
    spec:
      tolerations:    #污點配置,不往master上調度這個
        - effect: NoSchedule
          key: node-role.kubernetes.io/master
      containers:
      - image: quay.io/prometheus/node-exporter:v1.0.0
        imagePullPolicy: IfNotPresent
        name: prometheus-node-exporter
        ports:
        - containerPort: 9100
          hostPort: 9100
          protocol: TCP
          name: metrics
        volumeMounts:
        - mountPath: /host/proc
          name: proc
        - mountPath: /host/sys
          name: sys
        - mountPath: /host
          name: rootfs
        args:
        - --path.procfs=/host/proc
        - --path.sysfs=/host/sys
        - --path.rootfs=/host
      volumes:
        - name: proc
          hostPath:
            path: /proc
        - name: sys
          hostPath:
            path: /sys
        - name: rootfs
          hostPath:
            path: /
      hostNetwork: true
      hostPID: true
---
apiVersion: v1
kind: Service
metadata:
  annotations:
    prometheus.io/scrape: "true"
  labels:
    k8s-app: node-exporter
  name: node-exporter
  namespace: monitoring
spec:
  ports:
  - name: http
    port: 9100
    protocol: TCP
  selector:
    k8s-app: node-exporter

Prometheus抓取Node-Exporter

  - job_name: 'kubernetes-node-exporter'
    kubernetes_sd_configs:
    - role: node
    relabel_configs:
    - source_labels: [__address__]
      regex: '(.*):10250'
      replacement: '${1}:9100'
      target_label: __address__
      action: replace
    - source_labels: [__meta_kubernetes_node_name]
      action: replace
      target_label: node
    - action: labelmap
      regex: __meta_kubernetes_node_label_(.+)
    - source_labels: [__meta_kubernetes_node_address_InternalIP]
      action: replace
      target_label: ip

注意:這樣是抓取不到AWS EC2上打的Tag的,只能抓取到K8S集群對每個Node打的Labels