部署 Mongodb-Exporter

监控 Mongodb 需要创建 Monitor 用户

## 前提是你有足够的权限创建
db.createUser({
  user: "exporter",
  pwd: "exporter_password",
  roles: [
    { role: "clusterMonitor", db: "admin" },
    { role: "read", db: "local" }
  ]
});


## 本人没有权限创建只能监控部分指标
db.createUser({
  user: "exporter",
  pwd: "exporter_password", 
  roles: [
    { role: "read", db: "test" },
    { role: "read", db: "local" }
  ]
});

## 如果你有用户只想添加权限可以如下
db.updateUser("exporter", {
  roles: [
    { role: "userAdminAnyDatabase", db: "admin" },
    { role: "readWriteAnyDatabase", db: "admin" },
    { role: "backup", db: "admin" },
    { role: "restore", db: "admin" },
    { role: "dbAdminAnyDatabase", db: "admin" },
    { role: "clusterAdmin", db: "admin" }
  ]
});

有全部权限采集可以配置为 --collect-all，此处采集指标根据权限配置

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mongodb-exporter
  namespace: monitoring
  labels:
    app: mongodb-exporter
spec:
  selector:
    matchLabels:
      app: mongodb-exporter
  template:
    metadata:
      labels:
        app: mongodb-exporter
    spec:
      containers:
      - name: mongodb-exporter
        image: bitnami/mongodb-exporter
        args:
          - "--mongodb.user=exporter"
          - "--mongodb.password=123456"
          - "--mongodb.uri=mongodb://10.0.1.2:27017/admin"
          - "--collector.diagnosticdata"     //此处采集指标根据权限配置
          - "--collector.dbstats"
          - "--collector.dbstatsfreestorage"
          - "--collector.indexstats"
          - "--collector.collstats"
          - "--collector.profile"
          - "--collector.shards"
          - "--collector.pbm"
        ports:
        - containerPort: 9216
          name: http
---
apiVersion: v1
kind: Service
metadata:
  name: mongodb-exporter
  namespace: monitoring
  labels:
    app: mongodb-exporter
spec:
  ports:
  - name: api
    port: 9216
    targetPort: 9216
  type: ClusterIP
  selector:
    app: mongodb-exporter
---
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  labels:
    app.kubernetes.io/name: mongodb-exporter
    app.kubernetes.io/part-of: kube-prometheus
  name: mongodb-exporter
  namespace: monitoring
spec:
  endpoints:
  - honorLabels: true
    interval: 30s
    path: /metrics
    port: api
    scheme: http
  namespaceSelector:
    matchNames:
    - monitoring
  selector:
    matchLabels:
      app: mongodb-exporter