Creating Persistent High Performance Block Volume Storage

Learn to create a high performance block volume as persistent storage on Private Cloud Appliance.

If you don't need a high performance block volume, use the instructions in Creating Persistent Block Volume Storage.

Create a high performance block volume using the CSI plugin specified by the oci-bv-high storage class definition (provisioner: blockvolume.csi.oraclecloud.com).

$ kubectl create -f csi-bvs-high.yaml

The following is the content of the csi-bvs-high.yaml file:

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: oci-bv-high
provisioner: blockvolume.csi.oraclecloud.com
parameters:
  vpusPerGB: "20"
  attachment-type: "paravirtualized"
volumeBindingMode: WaitForFirstConsumer
allowVolumeExpansion: true
reclaimPolicy: Delete

Create a persistent volume claim, specifying the storage class name oci-bv-high.
```
$ kubectl create -f csi-bvs-high-pvc.yaml
```
The following is the content of the csi-bvs-high-pvc.yaml file:
```
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mynginxclaim-high
spec:
  storageClassName: "oci-bv-high"
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 50Gi
```
The persistent volume claim name in the metadata section is user-specified. You can have more than one persistent volume claim on a persistent volume.

For the value of accessModes, specify ReadWriteOnce. Do not use ReadWriteMany.

The value of the storage property must be at least 50 gigabytes.

Run the following command to verify that the PVC has been created:

$ kubectl get pvc
NAME                STATUS   VOLUME   CAPACITY   ACCESSMODES   STORAGECLASS   AGE
mynginxclaim-high   Pending                                    oci-bv-high    4m

The PVC has a status of Pending because the oci-bv-high storage class definition includes the following:

volumeBindingMode: WaitForFirstConsumer

Use the PVC when creating other objects, such as pods.

For example, you could create a new pod from the following pod definition, which instructs the system to use the mynginxclaim-high PVC as the nginx volume, which is mounted by the pod at /data:

apiVersion: v1
kind: Pod
metadata:
  name: nginx-high
spec:
  containers:
    - name: nginx
      image: nginx:latest
      ports:
        - name: http
          containerPort: 80
      volumeMounts:
        - name: data
          mountPath: /usr/share/nginx/html
  volumes:
    - name: data
      persistentVolumeClaim:
        claimName: mynginxclaim-high

Run the following command to verify that the PVC has been bound to a new PV:

$ kubectl get pvc
NAME                STATUS   VOLUME          CAPACITY   ACCESSMODES   STORAGECLASS   AGE
mynginxclaim-high   Bound    csi-unique_ID   50Gi       RWO           oci-bv-high

Run the following command to verify that the pod is using the new PVC:

$ kubectl describe pod nginx-high

Oracle Cloud Infrastructure Documentation

Creating Persistent High Performance Block Volume Storage