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Version: 3.1

Configure Pure Storage FlashBlade as a Direct Access filesystem

Use FlashBlade as a Direct Access filesystem​

Once you've configured Portworx to work with your FlashBlade, you can create a StorageClass and reference it in any PVCs you create.

Create a StorageClass​

The StorageClass describes how volumes should be created and managed in Kubernetes. It specifies the NFS endpoint, back-end type (pure_file for FlashBlade), and NFS export rules which control the access permissions for the mounted filesystem.

  1. Create a StorageClass spec, specifying your own values for the following:

    • parameters.pure_nfs_endpoint with endpoint of the FlashBlade you want to specify.
    • parameters.backend: with pure_file
    • parameters.pure_export_rules with any NFS export rules you desire
    • allowedTopologies with zone and region where you want the volume from this FlashBlade to be provisioned.
    • mountOptions with any CSI mount options you desire
    kind: StorageClass
    apiVersion: storage.k8s.io/v1
    metadata:
      name: portworx-multiple-nfs
    provisioner: pxd.portworx.com
    parameters:
      pure_nfs_endpoint: "<nfs-endpoint-1>"
      backend: "pure_file"
      pure_export_rules: "*(rw)"
    allowedTopologies:
      - matchLabelExpressions:
      - key: topology.portworx.io/zone
        values:
          - <zone-1>
      - key: topology.portworx.io/region
        values:
          - <region-1>
    mountOptions:
      - nfsvers=3
      - tcp
    allowVolumeExpansion: true

  2. Apply this spec to create a StorageClass:

    note

    To ensure successful PVC creation, verify that the labels in the allowedTopologies section uniquely identify a single FlashBlade endpoint from the pure.json file. For example, if you specify topology.portworx.io/zone: <zone-1> in the StorageClass, and both FlashBlades listed in the pure.json file qualify, Portworx will fail the creation of PVCs for FlashBlade Direct Access volumes and display the following error message:


      Events:
      Type     Reason                Age               From                                                                               Message
      ----     ------                ----              ----                                                                               -------
      Normal   Provisioning          1s (x4 over 10s)  pxd.portworx.com_px-csi-ext-6f77f7c664-xxxx                                        External provisioner is provisioning volume for claim "default/pure-multiple-nfs"
      Warning  ProvisioningFailed    1s (x4 over 9s)   pxd.portworx.com_px-csi-ext-6f77f7c664-xxx                                         failed to provision volume with StorageClass "portworx-multiple-nfs": rpc error: code = Internal desc = Failed to create volume: multiple storage backends match volume provisioner, unable to determine which backend the provided NFSEndpoint matches to
      Normal   ExternalProvisioning  0s (x3 over 10s)  persistentvolume-controller                                                        Waiting for a volume to be created either by the external provisioner 'pxd.portworx.com' or manually by the system administrator. If volume creation is delayed, please verify that the provisioner is running and correctly registered.

Create a PVC​

  1. Reference the StorageClass you created by entering the StorageClass name in the spec.storageClassName field:
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: pure-multiple-nfs
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 10Gi
  storageClassName: portworx-multiple-nfs
  1. Apply the spec to create a PVC:
kubectl apply -f <fb-pvc.yml>
persistentvolumeclaim/pure-multiple-nfs created

Add or modify NFS endpoints for existing volumes​

If you need to assign or change an NFS endpoint for existing FlashBlade Direct Access volumes that utilize a StorageClass where pure_nfs_endpoint was not specified, or if you want to modify the pure_nfs_endpoint after the volume has been created, run the following command. Replace <fb-management-endpoint> with the endpoint you wish to add or modify for a volume:

pxctl volume update --pure_nfs_endpoint "<fb-nfs-endpoint>" <existing-fb-pvc>
Update Volume: Volume update successful for volume pvc-80406c8d-xxx-xxxx
note

The mount over the newly assigned NFS endpoint will occur during the next mount cycle.

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