feat(validation): adding validation for ZFSPV CR parameters (#66)

Validating few parameters for the ZFSVolume custom resource

- compression can be "on", "off", "lzjb", "gzip", "gzip-[1-9]", "zle" and "lz4"
- encryption can be "on", "off", "aes-128-ccm", "aes-192-ccm", "aes-256-ccm", "aes-128-gcm", "aes-192-gcm", and "aes-256-gcm"
- dedup can be "on" and "off"
- poolname can be string
- ownernodeid can be string
- thinprovision can be "yes" and "no"
- volumetype can be "DATASET" and "ZVOL"

Also added required fields needed to create ZFSVolume CR
- ownerNodeID
- poolname
- volumeType
- capacity


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

buildscripts/generate-manifests.sh

@@ -0,0 +1,80 @@
+#!/bin/bash
+
+# Copyright 2019 The Kubernetes Authors.
+# Copyright 2020 The OpenEBS Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+#set -o errexit
+set -o nounset
+set -o pipefail
+
+## find or download controller-gen
+CONTROLLER_GEN=$(which controller-gen)
+
+if [ "$CONTROLLER_GEN" = "" ]
+then
+  echo "ERROR: failed to get controller-gen, Please run make bootstrap to install it";
+  exit 1;
+fi
+
+SCRIPT_ROOT=$(unset CDPATH && cd $(dirname "${BASH_SOURCE[0]}")/.. && pwd)
+
+$CONTROLLER_GEN crd:trivialVersions=true,preserveUnknownFields=false paths=${SCRIPT_ROOT}/pkg/apis/openebs.io/zfs/v1alpha1 output:crd:artifacts:config=deploy/yamls
+
+## create the the crd yamls
+
+echo '
+
+##############################################
+###########                       ############
+###########   ZFSVolume CRD       ############
+###########                       ############
+##############################################
+
+# ZFSVolume CRD is autogenerated via `make manifests` command.
+# Do the modification in the code and run the `make manifests` command
+# to generate the CRD definition' > deploy/yamls/zfsvolume-crd.yaml
+
+cat deploy/yamls/zfs.openebs.io_zfsvolumes.yaml >> deploy/yamls/zfsvolume-crd.yaml
+rm deploy/yamls/zfs.openebs.io_zfsvolumes.yaml
+
+echo '
+
+##############################################
+###########                       ############
+###########   ZFSSnapshot CRD     ############
+###########                       ############
+##############################################
+
+# ZFSSnapshot CRD is autogenerated via `make manifests` command.
+# Do the modification in the code and run the `make manifests` command
+# to generate the CRD definition' > deploy/yamls/zfssnapshot-crd.yaml
+
+cat deploy/yamls/zfs.openebs.io_zfssnapshots.yaml >> deploy/yamls/zfssnapshot-crd.yaml
+rm deploy/yamls/zfs.openebs.io_zfssnapshots.yaml
+
+## create the operator file using all the yamls
+
+echo '# This manifest is autogenerated via `make manifests` command
+# Do the modification to the zfs-driver.yaml in directory deploy/yamls/
+# and then run `make manifests` command
+
+# This manifest deploys the OpenEBS ZFS control plane components,
+# with associated CRs & RBAC rules.
+' > deploy/zfs-operator.yaml
+
+cat deploy/yamls/namespace.yaml deploy/yamls/zfsvolume-crd.yaml deploy/yamls/zfssnapshot-crd.yaml deploy/yamls/zfs-driver.yaml >> deploy/zfs-operator.yaml
+
+# To use your own boilerplate text use:
+#   --go-header-file ${SCRIPT_ROOT}/hack/custom-boilerplate.go.txt