This topic describes how to create a dynamic NAS volume by creating a subdirectory in a NAS file system and mapping the subdirectory to a dynamic persistent volume (PV) for applications.

Prerequisites

The FlexVolume driver is installed in a Container Service for Kubernetes (ACK) cluster. By default, the FlexVolume driver is installed for ACK clusters.

alicloud-nas-controller is deployed. For more information, see Install plug-ins.

Create a dynamic NAS volume

  1. Configure a StorageClass.
    The following code block is an example of the StorageClass: 
    apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: alicloud-nas
mountOptions:
- nolock,tcp,noresvport
- vers=3
parameters:
  server: "23a9649583-iaq37.cn-shenzhen.nas.aliyuncs.com:/nasroot1/"
  driver: flexvolume
provisioner: alicloud/nas
reclaimPolicy: Delete
    Note
    • mountOptions: the mount options of the PV. The NAS volume is mounted based on the specified mount options.
    • server: the list of mount targets that are used by the PV. The format is nfsurl1:/path1,nfsurl2:/path2. When multiple servers are configured, the PV provisioned by this StorageClass uses the servers in a round robin manner. For NAS file systems of Extreme type, the path must start with /share.
    • driver: supports the FlexVolume and NFS drivers. The default driver is NFS.
    • reclaimPolicy: the reclaim policy of the PV. We recommend that you set this parameter to Retain.
      • If you set this parameter to Delete, the name of the subdirectory mapped to the PV is automatically changed after you delete the PV. For example, path-name is changed to archived-path-name.
      • If you want to delete the subdirectory in the NAS file system, set archiveOnDelete to false in the StorageClass.
  2. Use the dynamic NAS volume. 
    apiVersion: v1
kind: Service
metadata:
  name: nginx
  labels:
    app: nginx
spec:
  ports:
  - port: 80
    name: web
  clusterIP: None
  selector:
    app: nginx
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: web
spec:
  serviceName: "nginx"
  replicas: 5
  volumeClaimTemplates:
  - metadata:
      name: html
    spec:
      accessModes:
        - ReadWriteOnce
      storageClassName: alicloud-nas
      resources:
        requests:
          storage: 2Gi
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:alpine
        volumeMounts:
        - mountPath: "/data"
          name: html