交付node-exporter

# 200机器，下载镜像并准备资源配置清单：
~]# docker pull prom/node-exporter:v0.15.0
~]# docker images|grep node-exporter
~]# docker tag 12d51ffa2b22 harbor.od.com/public/node-exporter:v0.15.0
~]# docker push harbor.od.com/public/node-exporter:v0.15.0
~]# mkdir /data/k8s-yaml/node-exporter/
~]# cd /data/k8s-yaml/node-exporter/
node-exporter]# vi ds.yaml
kind: DaemonSet
apiVersion: extensions/v1beta1
metadata:
  name: node-exporter
  namespace: kube-system
  labels:
    daemon: "node-exporter"
    grafanak8sapp: "true"
spec:
  selector:
    matchLabels:
      daemon: "node-exporter"
      grafanak8sapp: "true"
  template:
    metadata:
      name: node-exporter
      labels:
        daemon: "node-exporter"
        grafanak8sapp: "true"
    spec:
      volumes:
      - name: proc
        hostPath: 
          path: /proc
          type: ""
      - name: sys
        hostPath:
          path: /sys
          type: ""
      containers:
      - name: node-exporter
        image: harbor.od.com/public/node-exporter:v0.15.0
        imagePullPolicy: IfNotPresent
        args:
        - --path.procfs=/host_proc
        - --path.sysfs=/host_sys
        ports:
        - name: node-exporter
          hostPort: 9100
          containerPort: 9100
          protocol: TCP
        volumeMounts:
        - name: sys
          readOnly: true
          mountPath: /host_sys
        - name: proc
          readOnly: true
          mountPath: /host_proc
      hostNetwork: true

# 22机器，应用：
# 先看一下宿主机有没有9100端口，发现什么都没有
~]# netstat -luntp|grep 9100
~]# kubectl apply -f http://k8s-yaml.od.com/node-exporter/ds.yaml
# 创建完再看端口，可能启动的慢些，我是刷了3次才有
~]# netstat -luntp|grep 9100
~]# curl localhost:9100
# 该命令是查看取出来的信息
~]# curl localhost:9100/metrics