Use static volumes - User Guide for Kubernetes Clusters| Alibaba Cloud Documentation Center

You can use Alibaba Cloud static volumes directly or through PVs and PVCs.

Prerequisites

To use a disk as a volume, you must create the disk in the ECS console first. For more information about how to create a disk, see Create a pay-as-you-go disk.

Directly as volumes

Use the following disk-deploy.yaml file to create a Pod:

Create the disk-deploy.yaml file with the following content.

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: d-wz9f6l6nm0uvazgh7y17
          mountPath: /data
      volumes:
        - name: "d-wz9f6l6nm0uvazgh7y17"
          flexVolume:
            driver: "alicloud/disk"
            fsType: "ext4"
            options:
              volumeId: "d-wz9f6l6nm0uvazgh7y17"

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

Note

In the volumes section, we recommend that you set the name and volumeId to the same value.

If your cluster is deployed across multiple zones, you need to schedule the Pod and disk to the same zone.

You need to add a nodeSelector for the Pod as follows:

nodeSelector:
        failure-domain.beta.kubernetes.io/zone: cn-hangzhou-b

Through PVs and PVCs

Use a disk to create a PV
You can create a PV through the console or by using a YAML file.
- Create a PV by using a YAML file
  Use the following disk-pv.yaml file to create a PV:
```
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, volumeId.
- Create a PV through the console
  1. Log on to the Container Service console.
  2. In the left-side navigation pane, choose Clusters > Persistent Volumes to go to the PVs and PVCs page.
  3. On the Persistent Volumes tab, select a cluster and click Create in the upper-right corner.
  4. Set the parameters in the Create PV dialog box.
    - PV Type: In this example, set the PV type to Cloud Disk.
    - Access Mode: Default is ReadWriteOnce.
    - Disk ID: Select a disk that is in the same region and zone as your cluster.
    - File System Type: Select the data type in which data is stored in the disk. Supported data types include ext4, ext3, xfs, and vfat. Default is ext4.
    - Label: Add labels for the PV.
  5. After the configuration is complete, click Create.

Create a PVC

Use the following disk-pvc.yaml file to create a PVC:

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

Create a Pod

Use the following disk-pod.yaml file to create a Pod:

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