kubernetes配備prometheusノート(一)

後で忘れないようにメモをとる
1.glusterfsをバックエンドとして記憶するglusterfs volumeを作成する.
2.namespace monitoring-namespacesを作成する.yaml:

apiVersion: v1
kind: Namespace
metadata:
  name: monitoring

kubectl create -f monitoring-namespaces.yaml
3.glusterfs endpoint,monitoring-endpointsを作成する.json:

{
  "kind": "Endpoints",
  "apiVersion": "v1",
  "metadata": {
    "name": "glusterfs-monitoring",
    "namespace": "monitoring"
  },
  "subsets": [
    {
      "addresses": [
        {
          "ip": "10.0.115.14"
        }
      ],
      "ports": [
        {
          "port": 24007
        }
      ]
    },
    {
      "addresses": [
        {
          "ip": "10.0.115.15"
        }
      ],
      "ports": [
        {
          "port": 24007
        }
      ]
    }
  ]
}

kubectl create -f monitoring-endpoints.json
4.PV、monitoring-pvを作成する.yaml:

apiVersion: v1
kind: PersistentVolume
metadata:
  name: gluster-monitoring-volume
  namespace: monitoring
spec:
  capacity:
    storage: 500Gi
  accessModes:
    - ReadWriteMany
  glusterfs:
    endpoints: "glusterfs-monitoring"
    path: "monitoring-volume" -- glusterfs volume 
    readOnly: false

5.pvc,glusterfs-prometheus-pvcを作成する.yaml:

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: gluster-prometheus
  namespace: monitoring
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 100Gi

pvcの状態がboundであることがわかりますが、
root@node10:~/prometheus# kubectl get pvc -n monitoringNAME                 STATUS    VOLUME                      CAPACITY   ACCESS MODES   STORAGECLASS   AGEgluster-prometheus   Bound     gluster-monitoring-volume   500Gi      RWX                           1h
6.準備yaml:

kind: Deployment
metadata:
  name: prometheus-deployment
  namespace: monitoring
spec:
  replicas: 1
  selector:
    matchLabels:
      app: prometheus-server
  template:
    metadata:
      labels:
        app: prometheus-server
    spec:
      securityContext:
        runAsUser: 0
      containers:
        - name: prometheus
          image: prom/prometheus:v2.2.0
          args:
            - "--config.file=/etc/prometheus/prometheus.yml"
            - "--storage.tsdb.path=/prometheus/"
          ports:
            - containerPort: 9090
          volumeMounts:
            - name: gluster-volume
              mountPath: /prometheus/
      volumes:
        - name: gluster-volume
          persistentVolumeClaim:
            claimName: gluster-prometheus

7.サービスを作成し、アクセスポートprometheus-サービスを暴露する.yaml:

apiVersion: v1
kind: Service
metadata:
  name: prometheus-service
  namespace: monitoring
spec:
  selector:
    app: prometheus-server
  type: NodePort
  ports:
    - port: 8080
      targetPort: 9090
      nodePort: 30000

NodeIP:30000でgrafana dashboardにアクセスできます.
注意事項:
1.err="Opening storage failed open DB in/prometheus/:open/prometheus/67340982:permission denied"このエラーを報告する解決策はprometheusである.yamlに追加

securityContext:
        runAsUser: 0

2. pv,pvc,podは同じnamespaceで