Add cindernative mode to backup volume

Change-Id: I1ec7807cdcbf463a23f5d33e1c06157c7a691ccd

freezer/common/config.py

@@ -109,9 +109,11 @@ _COMMON = [
                dest='mode',
                default=DEFAULT_PARAMS['mode'],
                help="Set the technology to back from. Options are, fs "
-                    "(filesystem),mongo (MongoDB), mysql (MySQL), sqlserver "
+                    "(filesystem),mongo (MongoDB), mysql (MySQL), "
-                    "(SQL Server), cinder(OpenStack Volume), nova "
+                    "sqlserver(SQL Server), "
-                    "(OpenStack Instance). Default set to fs"),
+                    "cinder(OpenStack Volume backup by freezer), "
+                    "cindernative(OpenStack native cinder-volume backup)"
+                    "nova(OpenStack Instance). Default set to fs"),
     cfg.StrOpt('engine',
                short='e',
                choices=['tar', 'rsync', 'nova'],

freezer/mode/cindernative.py

@@ -0,0 +1,37 @@
+# (c) Copyright 2016 Hewlett-Packard Enterprise Development , L.P.
+#
+# 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.
+
+from freezer.mode import mode
+
+
+class CindernativeMode(mode.Mode):
+    """
+    Execute a cinder-volume native backup/restore
+    """
+    def __init__(self, conf):
+        self.conf = conf
+
+    @property
+    def name(self):
+        return "cindernative"
+
+    @property
+    def version(self):
+        return "1.0"
+
+    def release(self):
+        pass
+
+    def prepare(self):
+        pass