kube-prometheus ServiceMonitor使用

原理其实就是创建一个新的serviceMonitor后，prometheus会创建一个target

例子：ServiceMonitor.yaml

apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  labels:
     k8s-app: xxx-exporter
  name: xxx
  namespace: prometheus 
spec:
  endpoints:
  - interval: 15s
    port:  xxx-exporter
  jobLabel:  xxx-exporter-monitor 
  namespaceSelector:
    matchNames:
    - monitor                #目标服务的namespaces
  selector:
    matchLabels:
      k8s-app: xx-exporter  # 目标服务的labels

namespaceSelector:
    any: true 

表示选择所有的namespace

上面ServiceMonitor是针对k8s集群内部服务监控，想监控集群外部的exporter通Endpoints实现

为外部 exporter 服务设置 service:

apiVersion: v1
kind: Service
metadata:
  labels:
    app: monitoring-external-node-exporter
    app.kubernetes.io/name: node-exporter
    release: monitoring
  name: monitoring-external-node-exporter
  namespace: monitoring
spec:
  type: ClusterIP
  ports:
    - name: http-metrics
      port: 39xxx
      protocol: TCP
      targetPort: 39xxx

---
apiVersion: v1
kind: Endpoints
metadata:
  name: monitoring-external-node-exporter
  labels:
    app: monitoring-external-node-exporter
    app.kubernetes.io/name: node-exporter
    release: monitoring
  namespace: monitoring
subsets:
  - addresses:
      - ip: xx.xx.xx.xx
      - ip: xx.xx.xx.xx
    ports:
      - name: http-metrics
        port: 39xxx
        protocol: TCP
---
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  labels:
    app: monitoring-external-node-exporter
    release: monitoring
  name: monitoring-external-node-exporter-sm
  namespace: monitoring
spec:
  endpoints:
    - interval: 30s
      port: http-metrics
      path: /metrics
      authorization:
      basicAuth:
        username:
          name: external-node-exporter-basic-auth
          key: user
        password:
          name: external-node-exporter-basic-auth
          key: password
  jobLabel: node-exporter
  namespaceSelector:
    matchNames:
      - monitoring
  selector:
    matchLabels:
      app: monitoring-external-node-exporter
      release: monitoring