Configure Unity XT CSI Backend

CSI driver for Unity XT is a part of the CSM open-source suite of Kubernetes storage enablers for Dell products. It is a CSI driver that provides support for provisioning persistent storage using Dell Unity XT storage array.

Note

By default, the csi-unity chart is disabled. It is necessary to enable the chart and update user-overrides before applying the dell-storage application.

Enable CSI Unity Chart

Note

Disable any other CSI/CSM if not used/configured, otherwise it could cause the application to fail on apply.

(keystone_admin)$ system helm-chart-attribute-modify --enabled false dell-storage <chart_name> dell-storage

1. Enable the chart.

   (keystone_admin)$  system helm-chart-attribute-modify --enabled true dell-storage csi-unity dell-storage
   

2. Create overrides to configure the storage connection.

   :name: unityOverrides.yaml
   
    csm:
      resiliency: false
    app.starlingx.io/component: platform
   
    storageClasses:
    - name: unity-virt2307pjxdbt-nfs
      arrayId: <ARRAY_ID>
      nasServer: nas_2
      provisioner: csi-unity.dellemc.com
      fstype: nfs
      reclaimPolicy: Delete
      allowVolumeExpansion: true
      volumeBindingMode: Immediate
      mountOptions: ["hard"]
      hostIoSize: 8192
      tieringPolicy: 0
      isDataReductionEnabled: "false"
      thinProvisioned: "true"
      storagePool: pool_2
      protocol: NFS
      allowedTopologies:
        - matchLabelExpressions:
          - key: "csi-unity.dellemc.com/virt2307pjxdbt-nfs"
            values:
              - "true"
   
    secret:
      arrays:
      - arrayId: <ARRAY_ID>
        username: <USER>
        password: <PASSWORD>
        endpoint: https://<UNITY_ADDRESS>
        isDefault: true
        skipCertificateValidation: true
   

3. Apply overrides.

   (keystone_admin)$ system helm-override-update dell-storage csi-unity dell-storage --values=unityOverrides.yaml
   

4. Apply the chart.

   (keystone_admin)$ system application-apply dell-storage
   

UserOverrides Parameters

General Parameters

Parameter	Description	Required	Default
csm.resiliency	Enables/disables podmon sidecar container.	No	false
app.starlingx.io/component	Core Affinity.	No	platform

StorageClasses Parameters

Parameter	Description	Required	Default
storageClasses[0].hostIoSize	Inserts Host IO size that is to be set for the filesystem.	No	8192
storageClasses[0].name	StorageClass name.	No	“unity-” + arrayId + “-” + protocol
storageClasses[0].mountOptions	Defines mount input values.	No	[]
storageClasses[0].provisioner	Driver name.	No	csi-unity.dellemc.com
storageClasses[0].reclaimPolicy	PVs that are dynamically created by a StorageClass will have the reclaim policy specified here.	No	Delete
storageClasses[0].volumeBindingMode	Controls when volume binding and dynamic provisioning should occur.	No	Immediate
storageClasses[0].fstype	Filesystem type for mounted volumes.	No	nfs
storageClasses[0].protocol	Defines FC or FIBRE for FibreChannel, ISCSI, NFS, or “” for auto selection.	No	NFS
storageClasses[0].allowVolumeExpansion	Allows the users to resize the volume by editing the corresponding PVC object.	No	true
storageClasses[0].isDataReductionEnabled	Defines Boolean to choose value of is DataReductionEnabled while creating a new volume. Type: string.	No	true
storageClasses[0].thinProvisioned	Defines Boolean to choose value of thinProvisioned while creating a new volume. Type: string.	No	true
storageClasses[0].arrayId	ID of array to be used for volumes. arrayID corresponding to array’s globalID specified in secrets.	Yes	Not Applicable
storageClasses[0].nasServer	NAS server’s name. Important: required for NFS protocol.	No	Not Applicable
storageClasses[0].hostIOLimitName	Insert Host IO Limit Name that is to be used for provisioning here.	No	Not Applicable
storageClasses[0].tieringPolicy	Tiering policy to be used during provisioning. Requires FAST VP license.	No	Not Applicable
storageClasses[0].storagePool	Defines storage pool. Value should be picked from the column labeled “CLI ID” of pools in the Unisphere GUI.	Yes	Not Applicable
storageClasses[0].allowedTopologies	This feature lets you specify sub-divisions of a cluster for a volume to be placed in.	No	Not Applicable

Secret Parameters

Parameter	Description	Required	Default
secret.arrays	List of Unity XT.	Yes	Not Applicable
secret.arrays[0].arrayId	Array ID of Unity XT.	Yes	Not Applicable
secret.arrays[0].username	Username for connecting to Unity XT Unisphere REST API server.	Yes	Not Applicable
secret.arrays[0].password	Password for connecting to Unity XT Unisphere REST API server.	Yes	Not Applicable
secret.arrays[0].endpoint	HTTPS endpoint of the Unity XT Unisphere REST API server.	Yes	Not Applicable
secret.arrays[0].isDefault	Treats current array as a default. Use at least one of the arrays as default.	No	false
secret.arrays[0].skipCertificateValidation	Indicates if client side validation of server’s certificate can be skipped.	No	true