Cinder model integration

This patch adds Cinder model integration.

Change-Id: I31d5bc5e2bbed885d074d66bf7999d42cec15f10
Implements: blueprint cinder-model-integration

watcher/decision_engine/model/element/volume.py

@@ -0,0 +1,56 @@
+# -*- encoding: utf-8 -*-
+# Copyright 2017 NEC Corporation
+#
+# 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.
+
+import enum
+
+from watcher.decision_engine.model.element import storage_resource
+from watcher.objects import base
+from watcher.objects import fields as wfields
+
+
+class VolumeState(enum.Enum):
+    # https://developer.openstack.org/api-ref/block-storage/v3/#volumes-volumes
+
+    CREATING = 'creating'
+    AVAILABLE = 'available'
+    ATTACHING = 'attaching'
+    IN_USE = 'in-use'
+    DELETING = 'deleting'
+    ERROR = 'error'
+    ERROR_DELETING = 'error_deleting'
+    BACKING_UP = 'backing-up'
+    RESTORING_BACKUP = 'restoring-backup'
+    ERROR_RESTORING = 'error_restoring'
+    ERROR_EXTENDING = 'error_extending'
+
+
+@base.WatcherObjectRegistry.register_if(False)
+class Volume(storage_resource.StorageResource):
+
+    fields = {
+        "size": wfields.NonNegativeIntegerField(),
+        "status": wfields.StringField(default=VolumeState.AVAILABLE.value),
+        "attachments": wfields.FlexibleListOfDictField(),
+        "name": wfields.StringField(),
+        "multiattach": wfields.BooleanField(),
+        "snapshot_id": wfields.UUIDField(),
+        "project_id": wfields.UUIDField(),
+        "metadata": wfields.JsonField(),
+        "bootable": wfields.BooleanField()
+    }
+
+    def accept(self, visitor):
+        raise NotImplementedError()