feat(crd): upgrade script for refactoring the CRD

steps to upgrade :-

1. run pre-upgrade.sh
2. upgrade the driver t0 v0.6
3. run post-upgrade.sh

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

upgrade/post-upgrade.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+set -e
+
+kubectl get zfsvolumes.openebs.io -n openebs -oyaml > volumes.yaml
+
+# remove the finalizer from the old CR
+sed -i "/zfs.openebs.io\/finalizer/d" volumes.yaml
+kubectl apply -f volumes.yaml
+
+# delete the old CR
+kubectl delete -f volumes.yaml
+
+# delete the CRD definition
+kubectl delete crd zfsvolumes.openebs.io
+
+
+kubectl get zfssnapshots.openebs.io -n openebs -oyaml > snapshots.yaml
+
+# remove the finalizer from the old CR
+sed -i "/zfs.openebs.io\/finalizer/d" snapshots.yaml
+kubectl apply -f snapshots.yaml
+
+# delete the old CR
+kubectl delete -f snapshots.yaml
+
+# delete the CRD definition
+kubectl delete crd zfssnapshots.openebs.io

upgrade/pre-upgrade.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+set -e
+
+# ZFSVolumes: create the new CR with apiVersion as zfs.openebs.io and kind as Volume
+
+kubectl get zfsvolumes.openebs.io -n openebs -oyaml > volumes.yaml
+
+
+# update the group name to zfs.openebs.io
+sed -i "s/apiVersion: openebs.io/apiVersion: zfs.openebs.io/g" volumes.yaml
+# update the kind to Volume
+sed -i "s/kind: ZFSVolume/kind: Volume/g" volumes.yaml
+# create the new CR
+kubectl apply -f volumes.yaml
+
+rm volumes.yaml
+
+
+# ZFSSnapshots: create the new CR with apiVersion as zfs.openebs.io and kind as Snapshot
+
+kubectl get zfssnapshots.openebs.io -n openebs -oyaml > snapshots.yaml
+
+
+# update the group name to zfs.openebs.io
+sed -i "s/apiVersion: openebs.io/apiVersion: zfs.openebs.io/g" snapshots.yaml
+# update the kind to Snapshot
+sed -i "s/kind: ZFSSnapshot/kind: Snapshot/g" snapshots.yaml
+# create the new CR
+kubectl apply -f snapshots.yaml
+
+rm snapshots.yaml