node-exporter yaml

docker pull prom/node-exporter

node-exporter.yaml

apiVersion: apps/v1 
kind: DaemonSet #daemonset会保证每个node都有这个pod
metadata:
  name: node-exporter
  namespace: promtest
spec:
  selector: 
    matchLabels: 
      app: node-exporter
  template:
    metadata:
      labels:
        app: node-exporter
    spec:
      hostPID: true
      hostIPC: true
      hostNetwork: true
      containers:
      - name: node-exporter
        image: prom/node-exporter
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 9100
          hostPort: 9100
        resources:
          requests:
            cpu: 100m
            memory: 100Mi
          limits:
            cpu: 2000m
            memory: 2Gi        
        securityContext:
          privileged: true
        args:
        - --path.procfs
        - /host/proc
        - --path.sysfs
        - /host/sys
        - --path.rootfs
        - /host/root
        - --collector.filesystem.ignored-mount-points
        - '"^/(sys|proc|dev|host|etc)($|/)"'
        - "--collector.processes"
        volumeMounts:
        - name: dev
          mountPath: /host/dev
        - name: proc
          mountPath: /host/proc
        - name: sys
          mountPath: /host/sys
        - name: rootfs
          mountPath: /host/root
      tolerations: #污点容忍
      - 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: /
#如果要在容器环境中部署node-exporter，需要将主机的根节点绑定到容器环境，不然在查询磁盘等参数时，数据是不准确的

node-ser.yaml

kind: Service
apiVersion: v1
metadata:
  name: node-ser
  namespace: promtest
  labels:
    app: node-exporter
spec:
  ports:
  - name: metricsa
    port: 9100
    protocol: TCP
    targetPort: 9100
  selector:
    app: node-exporter