feat(zfs-localpv): initial commit

provisioning and deprovisioning of
the volumes on the node where zfs pool
has already been setup. Pool name and the volume
parameters has to be given in storage class
which will be used to provision the volume.

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

deploy/sample/fio.yaml

@@ -0,0 +1,54 @@
+apiVersion: storage.k8s.io/v1
+kind: StorageClass
+metadata:
+  name: openebs-zfspv
+allowVolumeExpansion: true
+parameters:
+  blocksize: "4k"
+  compression: "on"
+  dedup: "on"
+  thinprovision: "yes"
+  poolname: "zfspv-pool"
+provisioner: openebs.io/zfs
+volumeBindingMode: WaitForFirstConsumer
+---
+kind: PersistentVolumeClaim
+apiVersion: v1
+metadata:
+  name: csi-zfspv
+spec:
+  storageClassName: openebs-zfspv
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 4Gi
+---
+apiVersion: v1
+kind: Pod
+metadata:
+  name: fio
+spec:
+  affinity:
+    nodeAffinity:
+      requiredDuringSchedulingIgnoredDuringExecution:
+        nodeSelectorTerms:
+        - matchExpressions:
+          - key: kubernetes.io/hostname
+            operator: In
+            values:
+            - gke-pawan-zfspv-default-pool-1813a371-6nhl
+  restartPolicy: Never
+  containers:
+  - name: perfrunner
+    image: openebs/tests-fio
+    command: ["/bin/bash"]
+    args: ["-c", "while true ;do sleep 50; done"]
+    volumeMounts:
+       - mountPath: /datadir
+         name: fio-vol
+    tty: true
+  volumes:
+  - name: fio-vol
+    persistentVolumeClaim:
+      claimName: csi-zfspv