feat(ZFSPV): adding support for applications to create "zfs" flesystem (#15)

Application can now create a storageclass to create zfs filesystem

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: openebs-zfspv5
allowVolumeExpansion: true
parameters:
  blocksize: "4k"
  fstype: "zfs"
  poolname: "zfspv-pool"
provisioner: zfs.csi.openebs.io

ZFSPV was supporting ext2/3/4 and xfs filesystem only which
adds one extra filesystem layer on top of ZFS filesystem. So now
we can driectly write to the ZFS filesystem and get the optimal performance
by directly creating ZFS filesystem for storage.

Signed-off-by: Pawan <pawan@mayadata.io>

deploy/zfs-operator.yaml

@@ -20,7 +20,7 @@ spec:
     singular: zfsvolume
     kind: ZFSVolume
     shortNames:
-    - zvol
+    - zfsvol
     - zv
   additionalPrinterColumns:
   - JSONPath: .spec.poolName
@@ -35,6 +35,18 @@ spec:
     name: Size
     description: Size of the volume
     type: string
+  - JSONPath: .spec.volblocksize
+    name: volblocksize
+    description: volblocksize for the created zvol
+    type: string
+  - JSONPath: .spec.recordsize
+    name: recordsize
+    description: recordsize for the created zfs dataset
+    type: string
+  - JSONPath: .spec.fsType
+    name: Filesystem
+    description: filesystem created on the volume
+    type: string
 
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