将azure磁盘挂载到azure Kubernetes for PostgreSQL pod

Question

我想挂载蓝色磁盘到蓝色Kubernetes的PostgreSQL pod。我的yml文件

postgres-storage.yaml

apiVersion: v1
kind: PersistentVolume
metadata:
  name: postgres-pv
spec:
  capacity:
    storage: 80Gi
  storageClassName: manual
  volumeMode: Filesystem
  accessModes:
    - ReadWriteOnce
  azureDisk:
    kind: Managed
    diskName: es-us-dev-core-test
    diskURI: /subscriptions/id/resourceGroups/kubernetes_resources_group/providers/Microsoft.Compute/disks/dev-test
    

---

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: postgres-pv-claim
spec:
  storageClassName: manual
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 80Gi

postgres-configmap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: postgres-config
  labels:
    app: postgres
data:
  POSTGRES_DB: dev-test
  POSTGRES_USER: admintpost
  POSTGRES_PASSWORD: ada3dassasa

StatefulSet.yml

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: postgres-statefulset
  labels:
    app: postgres
spec:
  serviceName: "postgres"
  replicas: 1
  selector:
    matchLabels:
      app: postgres
  template:
    metadata:
      labels:
        app: postgres
    spec:
      containers:
      - name: postgres
        image: postgres:12
        envFrom:
        - configMapRef:
            name: postgres-config
        ports:
        - containerPort: 5432
          name: postgresdb
        volumeMounts:
        - name: pv-data
          mountPath: /var/lib/postgresql/data
      volumes:
      - name: pv-data
        persistentVolumeClaim:
          claimName: postgres-pv-claim

创建磁盘https://docs.microsoft.com/en-us/azure/aks/azure-disk-volume说明

我得到一个错误，它无法连接到磁盘，您能告诉我如何添加Azure磁盘到pod.Thanks。

Answer 1

在正确的资源组中创建Azure磁盘

查看文件postgres-storage.yaml

在spec.azureDisk.diskURI中，我看到您已经在资源组kubernetes_resources_group中创建了磁盘。但是，您应该在名称类似于MC_kubernetes_resources_group_<your cluster name>_<region of the cluster>的资源组中创建磁盘

请确保您在与集群相同的可用区中创建磁盘。

将缓存模式设置为None

在文件postgres-storage.yaml中

将spec.azureDisk.cachingMode设置为None

修复StatefulSet.yml的定义

如果你使用的是Azure磁盘，那么在StatefulSet.yml文件中

在spec.template.spec中，您应该替换以下内容：

volumeMounts:
  - name: pv-data
    mountPath: /var/lib/postgresql/data

有了这个：

volumeMounts:
  - name: pv-data
    mountPath: /var/lib/postgresql/data
    subPath: pgdata

编辑:修复了最后一部分中的一些错误。