Statically provisioning persistent volumes

You can mount existing compute volumes to pods using static provisioning of persistent volumes.

To mount a compute volume

  1. In the self-service panel, obtain the ID of the desired volume.

  2. Access the Kubernetes cluster via the dashboard. Click Kubernetes access for instructions.
  3. On the Kubernetes dashboard, create a storage class, as described in Creating storage classes.
  4. Create a persistent volume. To do it, click + Create and specify the following YAML file:

    apiVersion: v1
    kind: PersistentVolume
    metadata:
      annotations:
        pv.kubernetes.io/provisioned-by: cinder.csi.openstack.org
      name: mypv
    spec:
      accessModes:
      - ReadWriteOnce
      capacity:
        storage: 10Gi
      csi:
        driver: cinder.csi.openstack.org
        fsType: ext4
        volumeHandle: c5850e42-4f9d-42b5-9bee-8809dedae424
      persistentVolumeReclaimPolicy: Delete
      storageClassName: default

    This manifest specifies the persistent volume mypv from the storage class default that has 10 GiB of storage and access mode that allows it to be mounted in the read/write mode by a single node. The PV mypv uses the compute volume with the ID c5850e42-4f9d-42b5-9bee-8809dedae424 as backing storage.

  5. Create a persistent volume claim. Before you define the PVC, make sure the PV is created and has the status “Available”. The existing PV must meet the claim’s requirements to storage size, access mode and storage class. Click + Create and specify the following YAML file:

    apiVersion: v1
    kind: PersistentVolumeClaim
    metadata:
      name: mypvc
    spec:
      accessModes:
      - ReadWriteOnce
      resources:
        requests:
          storage: 10Gi
      storageClassName: default

    Once the persistent volume claim mypvc is created, the volume mypv is bound to it.

  6. Create a pod and specify the PVC as its volume. Use the example from Step 4 in Dynamically provisioning persistent volumes.

    In the self-service panel, the compute volume will be mounted to the virtual machine running the Kubernetes pod.