Mount a statically provisioned disk volume - User Guide for Kubernetes Clusters| Alibaba Cloud Documentation Center

This topic describes how to mount a statically provisioned disk volume by using a persistent volume (PV) and a persistent volume claim (PVC).

Prerequisites

To mount a disk as a volume, you must first create the disk in the Elastic Compute Service (ECS) console. For more information, see Create a disk.

Note Your disk must meet the following requirements:

An ultra disk must have a minimum capacity of 20 GiB.
A standard SSD must have a minimum capacity of 20 GiB.
An enhanced SSD (ESSD) must have a minimum capacity of 20 GiB.

Mount a statically provisioned disk volume by using a PV and a PVC

Create a PV of the disk type.

You can create a PV of the disk type in the Container Service for Kubernetes (ACK) console or by using a YAML file.

Create a PV by using a YAML file.

Create a file named disk-pv.yaml by using the following template:

apiVersion: v1
kind: PersistentVolume
metadata:
  name: d-bp1j17ifxfasvts3****
  labels:
    failure-domain.beta.kubernetes.io/zone: cn-hangzhou-b
    failure-domain.beta.kubernetes.io/region: cn-hangzhou
spec:
  capacity:
    storage: 20Gi
  storageClassName: disk
  accessModes:
    - ReadWriteOnce
  flexVolume:
    driver: "alicloud/disk"
    fsType: "ext4"
    options:
      volumeId: "d-bp1j17ifxfasvts3****"

Note The name of the PV must be the same as the disk ID that is specified by volumeId.

Run the following command to create a PV:
```
kubectl apply -f disk-pv.yaml
```

Create a PV in the ACK console.

Log on to the ACK console.
In the left-side navigation pane of the ACK console, click Clusters.
On the Clusters page, find the cluster that you want to manage and click the name or click Details in the Actions column.
In the left-side navigation pane of the details page, choose Volumes > Persistent Volumes.
In the upper-right corner of the Persistent Volumes page, click Create.

In the Create PV dialog box, set the parameters.


Parameter	Description
PV Type	In this example, Cloud Disk is selected.
Volume Plug-in	In this example, Flexvolume is selected.
Access Mode	By default, this parameter is set to ReadWriteOnce.
Disk ID	Select a mountable disk that is deployed in the same region and zone as your cluster.
File System Type	Select the file system type of the disk. Valid values: ext4, ext3, xfs, and vfat. Default value: ext4.
Label	Add labels to the PV.

After you complete the settings, click Create.

Create a PVC.

Create a file named disk-pvc.yaml by using the following template:

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: pvc-disk
spec:
  accessModes:
    - ReadWriteOnce
  storageClassName: disk
  resources:
    requests:
      storage: 20Gi

Run the following command to create a PVC:
```
kubectl apply -f disk-pvc.yaml
```

Create a pod.

Create a file named disk-pod.yaml by using the following template:

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:
  selector:
    matchLabels:
      app: nginx
  serviceName: "nginx"
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80
          name: web
        volumeMounts:
        - name: pvc-disk
          mountPath: /data
      volumes:
        - name: pvc-disk
          persistentVolumeClaim:
            claimName: pvc-disk

Run the following command to create a pod:
```
kubectl apply -f disk-pod.yaml
```