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.

   ~(keystone_admin)$ cat << EOF > /home/sysadmin/unityOverrides.yaml
    csm:
      resiliency: true
    labels:
      isApplication: false
    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
    EOF
   

3. Apply overrides.

   ~(keystone_admin)$ system helm-override-update dell-storage csi-unity dell-storage --values=/home/sysadmin/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
labels.isApplication	If set to true it can run with application core affinity, otherwise it runs as platform.	No	false

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