Add Trove datasource

Intorduces Trove datasource enabling Trove instances and clusters in
Vitrage Entity Graph.

Change-Id: I4c42c577216a6d1ef911c60b151f1e9fe6d729dd
Signed-off-by: Bartosz Zurkowski <b.zurkowski@samsung.com>

devstack/plugin.sh

@@ -188,6 +188,11 @@ function configure_vitrage {
         disable_vitrage_datasource heat.stack
     fi
 
+    # remove trove vitrage datasource if trove datasource not installed
+    if ! is_service_enabled trove; then
+        disable_vitrage_datasource trove.instance trove.cluster
+    fi
+
     # remove nagios vitrage datasource if nagios datasource not installed
     if [ "$VITRAGE_USE_NAGIOS" == "False" ]; then
         disable_vitrage_datasource nagios

devstack/settings

@@ -37,7 +37,7 @@ VITRAGE_DEPLOY=${VITRAGE_DEPLOY}
 # Toggle for deploying Vitrage with/without nagios
 VITRAGE_USE_NAGIOS=$(trueorfalse False VITRAGE_USE_NAGIOS)
 
-VITRAGE_DEFAULT_DATASOURCES=${VITRAGE_DEFAULT_DATASOURCES:-nova.host,nova.instance,nova.zone,nagios,static,aodh,cinder.volume,neutron.network,neutron.port,heat.stack,doctor,prometheus}
+VITRAGE_DEFAULT_DATASOURCES=${VITRAGE_DEFAULT_DATASOURCES:-nova.host,nova.instance,nova.zone,nagios,static,aodh,cinder.volume,neutron.network,neutron.port,heat.stack,doctor,prometheus,trove.instance,trove.cluster}
 
 # for now dont use pip install for the client
 LIBS_FROM_GIT=python-vitrageclient

etc/vitrage/datasources_values/trove.cluster.yaml

@@ -0,0 +1,31 @@
+category: RESOURCE
+values:
+  - aggregated values:
+      priority: 50
+      original values:
+        - name: DELETED
+          operational_value: DELETED
+  - aggregated values:
+      priority: 40
+      original values:
+        - name: ERROR
+          operational_value: ERROR
+  - aggregated values:
+      priority: 30
+      original values:
+        - name: GROWING
+          operational_value: TRANSIENT
+        - name: SHRINKING
+          operational_value: TRANSIENT
+        - name: UPGRADING
+          operational_value: TRANSIENT
+  - aggregated values:
+      priority: 20
+      original values:
+        - name: SUBOPTIMAL
+          operational_value: SUBOPTIMAL
+  - aggregated values:
+      priority: 10
+      original values:
+        - name: NONE
+          operational_value: OK

etc/vitrage/datasources_values/trove.instance.yaml

@@ -0,0 +1,47 @@
+category: RESOURCE
+values:
+  - aggregated values:
+      priority: 70
+      original values:
+        - name: DELETED
+          operational_value: DELETED
+  - aggregated values:
+      priority: 60
+      original values:
+        - name: FAILED
+          operational_value: ERROR
+        - name: ERROR
+          operational_value: ERROR
+  - aggregated values:
+      priority: 50
+      original values:
+        - name: SHUTDOWN
+          operational_value: SUBOPTIMAL
+        - name: BLOCKED
+          operational_value: SUBOPTIMAL
+  - aggregated values:
+      priority: 40
+      original values:
+        - name: RESIZING
+          operational_value: TRANSIENT
+        - name: UPGRADING
+          operational_value: TRANSIENT
+        - name: REBOOTING
+          operational_value: TRANSIENT
+  - aggregated values:
+      priority: 30
+      original values:
+        - name: NEW
+          operational_value: TRANSIENT
+        - name: BUILDING
+          operational_value: TRANSIENT
+  - aggregated values:
+      priority: 20
+      original values:
+        - name: SUBOPTIMAL
+          operational_value: SUBOPTIMAL
+  - aggregated values:
+      priority: 10
+      original values:
+        - name: ACTIVE
+          operational_value: OK

lower-constraints.txt

@@ -103,6 +103,7 @@ python-novaclient==10.1.0
 python-openstackclient==3.12.0
 python-subunit==1.2.0
 python-swiftclient==3.5.0
+python-troveclient==2.2.0
 pytz==2013.6
 PyYAML==3.12
 pyzabbix==0.7.4

releasenotes/notes/trove-datasource-2aa7a88ff20aff8c.yaml

@@ -0,0 +1,14 @@
+---
+features:
+  - A new ``Trove Datasource`` has been introduced to include Trove entities
+    (database instances and clusters) in Vitrage Entity Graph. Trove is Database
+    as a Service solution offering database lifecycle management (automated
+    provisioning, configuration, backups, clustering etc.). Adding the
+    datasource to Vitrage enables detecting problems at lower levels of
+    infrastructure that may affect functioning of running databases, and react
+    in response to identified issues e.g. scale the database up/out or
+    live-migrate virtual machines from failed compute. This change is the
+    first stage of integration with Trove. At this point, Trove entities are
+    extracted using PULL approach, based on periodical snapshot-query to Trove
+    API for the current list of Trove entities. In the future, PUSH approach
+    based on Trove notifications will be implemented.

requirements.txt

@@ -15,6 +15,7 @@ python-novaclient>=10.1.0 # Apache-2.0
 python-heatclient>=1.14.0 # Apache-2.0
 python-mistralclient>=3.3.0 # Apache-2.0
 python-openstackclient>=3.12.0 # Apache-2.0
+python-troveclient>=2.2.0 # Apache-2.0
 gnocchiclient>=3.3.1 # Apache-2.0
 pyzabbix>=0.7.4 # LGPL
 networkx>=2.0 # BSD
@@ -49,4 +50,4 @@ debtcollector>=1.19.0 # Apache-2.0
 cotyledon>=1.6.8 # Apache-2.0
 futures>=3.0.0;python_version=='2.7' or python_version=='2.6'  # BSD
 pytz>=2013.6 # MIT
-tenacity>=4.9.0
+tenacity>=4.9.0

vitrage/datasources/trove/cluster/__init__.py

@@ -0,0 +1,44 @@
+# Copyright 2018 Samsung Electronics
+# All Rights Reserved.
+#
+#    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 oslo_config import cfg
+from vitrage.common.constants import DatasourceOpts as DSOpts
+from vitrage.common.constants import UpdateMethod
+
+TROVE_CLUSTER_DATASOURCE = 'trove.cluster'
+
+OPTS = [
+    cfg.StrOpt(DSOpts.TRANSFORMER,
+               default='vitrage.datasources.trove.cluster.transformer.'
+                       'TroveClusterTransformer',
+               help='Trove transformer class path.',
+               required=True),
+    cfg.StrOpt(DSOpts.DRIVER,
+               default='vitrage.datasources.trove.cluster.driver.'
+                       'TroveClusterDriver',
+               help='Trove driver class path.',
+               required=True),
+    cfg.StrOpt(DSOpts.UPDATE_METHOD,
+               default=UpdateMethod.PULL,
+               help='None: updates only via Vitrage periodic snapshots.'
+                    'Pull: updates periodically.'
+                    'Push: updates by getting notifications from the'
+                    ' datasource itself.',
+               required=True),
+    cfg.IntOpt(DSOpts.CHANGES_INTERVAL,
+               default=30,
+               min=10,
+               help='Interval in seconds between checking changes in Trove'
+                    'cluster datasource.')]

vitrage/datasources/trove/cluster/driver.py

@@ -0,0 +1,51 @@
+# Copyright 2018 Samsung Electronics
+# All Rights Reserved.
+#
+#    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 oslo_log import log
+
+from vitrage.datasources.transformer_base import extract_field_value
+from vitrage.datasources.trove.cluster import TROVE_CLUSTER_DATASOURCE
+from vitrage.datasources.trove.properties import \
+    TroveClusterProperties as TProps
+from vitrage.datasources.trove.trove_driver_base import TroveDriverBase
+
+
+LOG = log.getLogger(__name__)
+
+
+class TroveClusterDriver(TroveDriverBase):
+
+    def __init__(self, conf):
+        super(TroveClusterDriver, self).__init__(conf)
+        self._cached_entities = []
+
+    def _get_vitrage_type(self):
+        return TROVE_CLUSTER_DATASOURCE
+
+    def _get_all_entities(self):
+        # TODO(bzurkowski): Add all_tenants option to Trove client
+        return self.extract_entities(self.client.clusters.list())
+
+    def _find_entity(self, search_entity, entities):
+        for entity in entities:
+            if entity[TProps.ID] == search_entity[TProps.ID]:
+                return entity
+
+    def _equal_entities(self, old_entity, new_entity):
+        old_state = extract_field_value(old_entity, *TProps.STATE)
+        new_state = extract_field_value(old_entity, *TProps.STATE)
+        return old_entity[TProps.ID] == new_entity[TProps.ID] and \
+            old_entity[TProps.NAME] == new_entity[TProps.NAME] and \
+            old_state == new_state

vitrage/datasources/trove/cluster/transformer.py

@@ -0,0 +1,84 @@
+# Copyright 2018 Samsung Electronics
+# All Rights Reserved.
+#
+#    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 vitrage.common.constants import DatasourceProperties as DSProps
+from vitrage.common.constants import EdgeLabel
+from vitrage.common.constants import EntityCategory
+from vitrage.common.constants import VertexProperties as VProps
+from vitrage.datasources.resource_transformer_base import \
+    ResourceTransformerBase
+from vitrage.datasources import transformer_base as tbase
+from vitrage.datasources.transformer_base import extract_field_value
+from vitrage.datasources.trove.cluster import TROVE_CLUSTER_DATASOURCE
+from vitrage.datasources.trove.instance import TROVE_INSTANCE_DATASOURCE
+from vitrage.datasources.trove.properties import \
+    TroveClusterProperties as TProps
+import vitrage.graph.utils as graph_utils
+
+
+class TroveClusterTransformer(ResourceTransformerBase):
+
+    def _create_snapshot_entity_vertex(self, entity_event):
+        return self._create_vertex(entity_event)
+
+    def _create_update_entity_vertex(self, entity_event):
+        return self._create_vertex(entity_event)
+
+    def _create_vertex(self, entity_event):
+        # TODO(bzurkowski): Add project ID
+        entity_id = entity_event[TProps.ID]
+        name = entity_event[TProps.NAME]
+        state = extract_field_value(entity_event, *TProps.STATE)
+        update_timestamp = entity_event[TProps.UPDATE_TIMESTAMP]
+        sample_timestamp = entity_event[DSProps.SAMPLE_DATE]
+        metadata = {
+            VProps.NAME: name
+        }
+        return graph_utils.create_vertex(
+            self._create_entity_key(entity_event),
+            vitrage_category=EntityCategory.RESOURCE,
+            vitrage_type=TROVE_CLUSTER_DATASOURCE,
+            vitrage_sample_timestamp=sample_timestamp,
+            entity_id=entity_id,
+            update_timestamp=update_timestamp,
+            entity_state=state,
+            metadata=metadata)
+
+    def _create_snapshot_neighbors(self, entity_event):
+        return self._create_entity_neighbours(entity_event)
+
+    def _create_update_neighbors(self, entity_event):
+        return self._create_entity_neighbours(entity_event)
+
+    def _create_entity_neighbours(self, entity_event):
+        neighbours = []
+        for instance in entity_event[TProps.INSTANCES]:
+            instance_neighbour = self._create_neighbor(
+                entity_event,
+                instance[TProps.ID],
+                TROVE_INSTANCE_DATASOURCE,
+                EdgeLabel.CONTAINS,
+                is_entity_source=True)
+            neighbours.append(instance_neighbour)
+        return neighbours
+
+    def _create_entity_key(self, entity_event):
+        entity_id = entity_event[TProps.ID]
+        key_fields = self._key_values(TROVE_CLUSTER_DATASOURCE, entity_id)
+        return tbase.build_key(key_fields)
+
+    @staticmethod
+    def get_vitrage_type():
+        return TROVE_CLUSTER_DATASOURCE

vitrage/datasources/trove/instance/__init__.py

@@ -0,0 +1,44 @@
+# Copyright 2018 Samsung Electronics
+# All Rights Reserved.
+#
+#    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 oslo_config import cfg
+from vitrage.common.constants import DatasourceOpts as DSOpts
+from vitrage.common.constants import UpdateMethod
+
+TROVE_INSTANCE_DATASOURCE = 'trove.instance'
+
+OPTS = [
+    cfg.StrOpt(DSOpts.TRANSFORMER,
+               default='vitrage.datasources.trove.instance.transformer.'
+                       'TroveInstanceTransformer',
+               help='Trove transformer class path.',
+               required=True),
+    cfg.StrOpt(DSOpts.DRIVER,
+               default='vitrage.datasources.trove.instance.driver.'
+                       'TroveInstanceDriver',
+               help='Trove driver class path.',
+               required=True),
+    cfg.StrOpt(DSOpts.UPDATE_METHOD,
+               default=UpdateMethod.PULL,
+               help='None: updates only via Vitrage periodic snapshots.'
+                    'Pull: updates periodically.'
+                    'Push: updates by getting notifications from the'
+                    ' datasource itself.',
+               required=True),
+    cfg.IntOpt(DSOpts.CHANGES_INTERVAL,
+               default=30,
+               min=10,
+               help='Interval in seconds between checking changes in Trove'
+                    'instance datasource.')]

vitrage/datasources/trove/instance/driver.py

@@ -0,0 +1,49 @@
+# Copyright 2018 Samsung Electronics
+# All Rights Reserved.
+#
+#    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 oslo_log import log
+
+from vitrage.datasources.trove.instance import TROVE_INSTANCE_DATASOURCE
+from vitrage.datasources.trove.properties import \
+    TroveInstanceProperties as TProps
+from vitrage.datasources.trove.trove_driver_base import TroveDriverBase
+
+
+LOG = log.getLogger(__name__)
+
+
+class TroveInstanceDriver(TroveDriverBase):
+
+    def __init__(self, conf):
+        super(TroveInstanceDriver, self).__init__(conf)
+        self._cached_entities = []
+
+    def _get_vitrage_type(self):
+        return TROVE_INSTANCE_DATASOURCE
+
+    def _get_all_entities(self):
+        # TODO(bzurkowski): Add all_tenants option to Trove client
+        return self.extract_entities(
+            self.client.instances.list(include_clustered=True, detailed=True))
+
+    def _find_entity(self, search_entity, entities):
+        for entity in entities:
+            if entity[TProps.ID] == search_entity[TProps.ID]:
+                return entity
+
+    def _equal_entities(self, old_entity, new_entity):
+        return old_entity[TProps.ID] == new_entity[TProps.ID] and \
+            old_entity[TProps.NAME] == new_entity[TProps.NAME] and \
+            old_entity[TProps.STATE] == new_entity[TProps.STATE]

vitrage/datasources/trove/instance/transformer.py

@@ -0,0 +1,81 @@
+# Copyright 2018 Samsung Electronics
+# All Rights Reserved.
+#
+#    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 vitrage.common.constants import DatasourceProperties as DSProps
+from vitrage.common.constants import EdgeLabel
+from vitrage.common.constants import EntityCategory
+from vitrage.common.constants import VertexProperties as VProps
+from vitrage.datasources.nova.instance import NOVA_INSTANCE_DATASOURCE
+from vitrage.datasources.resource_transformer_base import \
+    ResourceTransformerBase
+from vitrage.datasources import transformer_base as tbase
+from vitrage.datasources.trove.instance import TROVE_INSTANCE_DATASOURCE
+from vitrage.datasources.trove.properties import \
+    TroveInstanceProperties as TProps
+import vitrage.graph.utils as graph_utils
+
+
+class TroveInstanceTransformer(ResourceTransformerBase):
+
+    def _create_snapshot_entity_vertex(self, entity_event):
+        return self._create_vertex(entity_event)
+
+    def _create_update_entity_vertex(self, entity_event):
+        return self._create_vertex(entity_event)
+
+    def _create_vertex(self, entity_event):
+        entity_id = entity_event[TProps.ID]
+        name = entity_event[TProps.NAME]
+        state = entity_event[TProps.STATE]
+        project_id = entity_event[TProps.PROJECT_ID]
+        update_timestamp = entity_event[TProps.UPDATE_TIMESTAMP]
+        sample_timestamp = entity_event[DSProps.SAMPLE_DATE]
+        metadata = {
+            VProps.NAME: name,
+            VProps.PROJECT_ID: project_id
+        }
+        return graph_utils.create_vertex(
+            self._create_entity_key(entity_event),
+            vitrage_category=EntityCategory.RESOURCE,
+            vitrage_type=TROVE_INSTANCE_DATASOURCE,
+            vitrage_sample_timestamp=sample_timestamp,
+            entity_id=entity_id,
+            update_timestamp=update_timestamp,
+            entity_state=state,
+            metadata=metadata)
+
+    def _create_snapshot_neighbors(self, entity_event):
+        return self._create_entity_neighbours(entity_event)
+
+    def _create_update_neighbors(self, entity_event):
+        return self._create_entity_neighbours(entity_event)
+
+    def _create_entity_neighbours(self, entity_event):
+        server_neighbour = self._create_neighbor(
+            entity_event,
+            entity_event[TProps.SERVER_ID],
+            NOVA_INSTANCE_DATASOURCE,
+            EdgeLabel.CONTAINS,
+            is_entity_source=True)
+        return [server_neighbour]
+
+    def _create_entity_key(self, entity_event):
+        entity_id = entity_event[TProps.ID]
+        key_fields = self._key_values(TROVE_INSTANCE_DATASOURCE, entity_id)
+        return tbase.build_key(key_fields)
+
+    @staticmethod
+    def get_vitrage_type():
+        return TROVE_INSTANCE_DATASOURCE

vitrage/datasources/trove/properties.py

@@ -0,0 +1,34 @@
+# Copyright 2018 Samsung Electronics
+# All Rights Reserved.
+#
+#    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.
+
+
+class TroveBaseProperties(object):
+
+    ID = 'id'
+    NAME = 'name'
+    UPDATE_TIMESTAMP = 'updated'
+    PROJECT_ID = 'tenant_id'
+
+
+class TroveInstanceProperties(TroveBaseProperties):
+
+    STATE = 'status'
+    SERVER_ID = 'server_id'
+
+
+class TroveClusterProperties(TroveBaseProperties):
+
+    STATE = ('task', 'name')
+    INSTANCES = 'instances'

vitrage/datasources/trove/trove_driver_base.py

@@ -0,0 +1,104 @@
+# Copyright 2018 Samsung Electronics
+# All Rights Reserved.
+#
+#    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 abc
+
+from vitrage.common.constants import DatasourceProperties as DSProps
+from vitrage.common.constants import GraphAction
+from vitrage.datasources.driver_base import DriverBase
+from vitrage import os_clients
+
+
+class TroveDriverBase(DriverBase):
+
+    def __init__(self, conf):
+        super(TroveDriverBase, self).__init__()
+        self.conf = conf
+        self.__client = None
+        self.__cached_entities = []
+
+    @property
+    def client(self):
+        if not self.__client:
+            self.__client = os_clients.trove_client(self.conf)
+        return self.__client
+
+    def get_all(self, datasource_action):
+        return self.make_pickleable(self._get_and_cache_all_entities(),
+                                    self._get_vitrage_type(),
+                                    datasource_action,
+                                    *self.properties_to_filter_out())
+
+    def get_changes(self, datasource_action):
+        return self.make_pickleable(self._get_changed_entities(),
+                                    self._get_vitrage_type(),
+                                    datasource_action,
+                                    *self.properties_to_filter_out())
+
+    def _get_and_cache_all_entities(self):
+        self.__cached_entities = self._get_all_entities()
+        return self.__cached_entities
+
+    def _get_changed_entities(self):
+        actual_entities = self._get_all_entities()
+        changed_entities = []
+
+        for actual_entity in actual_entities:
+            cached_entity = self._find_entity(actual_entity,
+                                              self.__cached_entities)
+            if cached_entity:
+                # Add modified entities
+                if not self._equal_entities(actual_entity, cached_entity):
+                    changed_entities.append(actual_entity)
+            else:
+                # Add new entities
+                changed_entities.append(actual_entity)
+
+        # Delete removed entities
+        for cached_entity in self.__cached_entities:
+            if not self._find_entity(cached_entity, actual_entities):
+                cached_entity[DSProps.EVENT_TYPE] = GraphAction.DELETE_ENTITY
+                changed_entities.append(cached_entity)
+
+        self.__cached_entities = actual_entities
+        return changed_entities
+
+    @abc.abstractmethod
+    def _get_vitrage_type(self):
+        pass
+
+    @abc.abstractmethod
+    def _get_all_entities(self):
+        pass
+
+    @abc.abstractmethod
+    def _find_entity(self, search_entity, entities):
+        pass
+
+    @abc.abstractmethod
+    def _equal_entities(self, old_entity, new_entity):
+        pass
+
+    @staticmethod
+    def properties_to_filter_out():
+        return ['manager', '_info']
+
+    @staticmethod
+    def should_delete_outdated_entities():
+        return True
+
+    @staticmethod
+    def extract_entities(entities):
+        return [entity.to_dict() for entity in entities]

vitrage/os_clients.py

@@ -29,6 +29,7 @@ OPTS = [
     cfg.StrOpt('heat_version', default='1', help='Heat version'),
     cfg.StrOpt('mistral_version', default='2', help='Mistral version'),
     cfg.StrOpt('gnocchi_version', default='1', help='Gnocchi version'),
+    cfg.StrOpt('trove_version', default='1', help='Trove version'),
     cfg.BoolOpt('use_nova_versioned_notifications',
                 default=True,
                 help='Indicates whether to use Nova versioned notifications.'
@@ -47,7 +48,8 @@ _client_modules = {
     'neutron': 'neutronclient.v2_0.client',
     'heat': 'heatclient.client',
     'mistral': 'mistralclient.api.v2.client',
-    'gnocchi': 'gnocchiclient.v1.client'
+    'gnocchi': 'gnocchiclient.v1.client',
+    'trove': 'troveclient.v1.client'
 }
 
 
@@ -110,6 +112,20 @@ def nova_client(conf):
         LOG.exception('Create Nova client - Got Exception.')
 
 
+def trove_client(conf):
+    """Get an instance of trove client"""
+    try:
+        tr_client = driver_module('trove')
+        client = tr_client.Client(
+            version=conf.trove_version,
+            session=keystone_client.get_session(conf),
+        )
+        LOG.info('Trove client created')
+        return client
+    except Exception:
+        LOG.exception('Create Trove client - Got Exception.')
+
+
 def cinder_client(conf):
     """Get an instance of cinder client"""
     try:

vitrage/tests/functional/datasources/trove/test_trove_instance.py

@@ -0,0 +1,92 @@
+# Copyright 2018 Samsung Electronics
+# All Rights Reserved.
+#
+#    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 oslo_config import cfg
+from testtools import matchers
+
+from vitrage.common.constants import EntityCategory
+from vitrage.common.constants import VertexProperties as VProps
+from vitrage.datasources.nagios import NAGIOS_DATASOURCE
+from vitrage.datasources import NOVA_HOST_DATASOURCE
+from vitrage.datasources import NOVA_INSTANCE_DATASOURCE
+from vitrage.datasources import NOVA_ZONE_DATASOURCE
+from vitrage.datasources.trove.instance import TROVE_INSTANCE_DATASOURCE
+from vitrage.tests.functional.datasources.base import TestDataSourcesBase
+from vitrage.tests.mocks import mock_driver
+
+
+class TestTroveInstance(TestDataSourcesBase):
+
+    DATASOURCES_OPTS = [
+        cfg.ListOpt('types',
+                    default=[NAGIOS_DATASOURCE,
+                             NOVA_HOST_DATASOURCE,
+                             NOVA_INSTANCE_DATASOURCE,
+                             NOVA_ZONE_DATASOURCE,
+                             TROVE_INSTANCE_DATASOURCE],
+                    help='Names of supported driver data sources'),
+
+        cfg.ListOpt('path',
+                    default=['vitrage.datasources'],
+                    help='Base path for data sources')
+    ]
+
+    # noinspection PyPep8Naming
+    @classmethod
+    def setUpClass(cls):
+        super(TestTroveInstance, cls).setUpClass()
+        cls.conf = cfg.ConfigOpts()
+        cls.conf.register_opts(cls.PROCESSOR_OPTS, group='entity_graph')
+        cls.conf.register_opts(cls.DATASOURCES_OPTS, group='datasources')
+        cls.load_datasources(cls.conf)
+
+    def test_trove_instance_validity(self):
+        # Setup
+        processor = self._create_processor_with_graph(self.conf)
+        self.assertThat(processor.entity_graph,
+                        matchers.HasLength(
+                            self._num_total_expected_vertices())
+                        )
+
+        spec_list = mock_driver.simple_trove_instance_generators(
+            inst_num=1,
+            snapshot_events=1)
+        static_events = mock_driver.generate_random_events_list(spec_list)
+        trove_instance_event = static_events[0]
+        trove_instance_event['server_id'] = \
+            self._find_entity_id_by_type(processor.entity_graph,
+                                         NOVA_INSTANCE_DATASOURCE)
+
+        # Action
+        processor.process_event(trove_instance_event)
+
+        # Test assertions
+        self.assertThat(processor.entity_graph,
+                        matchers.HasLength(
+                            self._num_total_expected_vertices() + 1)
+                        )
+
+        trove_vertices = processor.entity_graph.get_vertices(
+            vertex_attr_filter={
+                VProps.VITRAGE_CATEGORY: EntityCategory.RESOURCE,
+                VProps.VITRAGE_TYPE: TROVE_INSTANCE_DATASOURCE
+            })
+        self.assertThat(trove_vertices, matchers.HasLength(1))
+
+        trove_neighbors = processor.entity_graph.neighbors(
+            trove_vertices[0].vertex_id)
+        self.assertThat(trove_neighbors, matchers.HasLength(1))
+        self.assertEqual(NOVA_INSTANCE_DATASOURCE,
+                         trove_neighbors[0][VProps.VITRAGE_TYPE])

vitrage/tests/mocks/mock_driver.py

@@ -203,6 +203,60 @@ def simple_zone_generators(zone_num, host_num, snapshot_events=0,
     return tg.get_trace_generators(test_entity_spec_list)
 
 
+def simple_trove_instance_generators(inst_num, snapshot_events=0,
+                                     snap_vals=None):
+    """A function for returning Trove instance generators.
+
+    Returns generators for a given number of Trove instances.
+
+    :param inst_num: number of instances
+    :return: generators for inst_num instances as specified
+    """
+
+    mapping = [('tr-instance-{0}'.format(idx), 'vm-{0}'.format(idx))
+               for idx in range(inst_num)]
+
+    test_entity_spec_list = [
+        {tg.DYNAMIC_INFO_FKEY: tg.DRIVER_TROVE_INSTANCE_SNAPSHOT_D,
+         tg.STATIC_INFO_FKEY: None,
+         tg.MAPPING_KEY: mapping,
+         tg.EXTERNAL_INFO_KEY: snap_vals,
+         tg.NAME_KEY: 'Database instance snapshot generator',
+         tg.NUM_EVENTS: snapshot_events
+         }
+    ]
+
+    return tg.get_trace_generators(test_entity_spec_list)
+
+
+def simple_trove_cluster_generators(clust_num, inst_num, snapshot_events=0,
+                                    snap_vals=None):
+    """A function for returning Trove cluster generators.
+
+    Returns generators for a given number of Trove clusters.
+
+    :param clust_num: number of clusters
+    :param inst_num: number of instances
+    :return: generators for clust_num clusters as specified
+    """
+
+    mapping = [('tr-cluster-{0}'.format(idx % clust_num),
+                'tr-inst-{0}'.format(idx))
+               for idx in range(inst_num)]
+
+    test_entity_spec_list = [
+        {tg.DYNAMIC_INFO_FKEY: tg.DRIVER_TROVE_CLUSTER_SNAPSHOT_D,
+         tg.STATIC_INFO_FKEY: None,
+         tg.MAPPING_KEY: mapping,
+         tg.EXTERNAL_INFO_KEY: snap_vals,
+         tg.NAME_KEY: 'Database cluster snapshot generator',
+         tg.NUM_EVENTS: snapshot_events
+         }
+    ]
+
+    return tg.get_trace_generators(test_entity_spec_list)
+
+
 def simple_volume_generators(volume_num, instance_num,
                              snapshot_events=0, update_events=0,
                              snap_vals=None, update_vals=None):

vitrage/tests/mocks/trace_generator.py

@@ -68,7 +68,10 @@ DRIVER_STACK_SNAPSHOT_D = 'driver_stack_snapshot_dynamic.json'
 DRIVER_CONSISTENCY_UPDATE_D = 'driver_consistency_update_dynamic.json'
 DRIVER_ZONE_SNAPSHOT_D = 'driver_zone_snapshot_dynamic.json'
 DRIVER_KUBE_SNAPSHOT_D = 'driver_kubernetes_snapshot_dynamic.json'
-
+DRIVER_TROVE_INSTANCE_SNAPSHOT_D = \
+    'driver_trove_instance_snapshot_dynamic.json'
+DRIVER_TROVE_CLUSTER_SNAPSHOT_D = \
+    'driver_trove_cluster_snapshot_dynamic.json'
 
 # Mock transformer Specs (i.e., what the transformer outputs)
 MOCK_TRANSFORMER_PATH = '%s/mock_configurations/transformer' % \
@@ -79,7 +82,6 @@ TRANS_DOCTOR_UPDATE_D = 'transformer_doctor_update_dynamic.json'
 TRANS_COLLECTD_UPDATE_D = 'transformer_collectd_update_dynamic.json'
 TRANS_PROMETHEUS_UPDATE_D = 'transformer_prometheus_update_dynamic.json'
 TRANS_INST_SNAPSHOT_D = 'transformer_inst_snapshot_dynamic.json'
-TRANS_INST_SNAPSHOT_S = 'transformer_inst_snapshot_static.json'
 TRANS_HOST_SNAPSHOT_D = 'transformer_host_snapshot_dynamic.json'
 TRANS_HOST_SNAPSHOT_S = 'transformer_host_snapshot_static.json'
 TRANS_ZONE_SNAPSHOT_D = 'transformer_zone_snapshot_dynamic.json'
@@ -139,7 +141,10 @@ class EventTraceGenerator(object):
              DRIVER_CONSISTENCY_UPDATE_D:
                  _get_consistency_update_driver_values,
              DRIVER_PROMETHEUS_UPDATE_D: _get_simple_update_driver_values,
-
+             DRIVER_TROVE_INSTANCE_SNAPSHOT_D:
+                _get_trove_instance_snapshot_driver_values,
+             DRIVER_TROVE_CLUSTER_SNAPSHOT_D:
+                _get_trove_cluster_snapshot_driver_values,
              TRANS_AODH_SNAPSHOT_D: _get_trans_aodh_alarm_snapshot_values,
              TRANS_AODH_UPDATE_D: _get_trans_aodh_alarm_snapshot_values,
              TRANS_DOCTOR_UPDATE_D: _get_simple_trans_alarm_update_values,
@@ -664,6 +669,40 @@ def _get_zabbix_alarm_driver_values(spec):
     return static_values
 
 
+def _get_trove_instance_snapshot_driver_values(spec):
+    inst_srv_mapping = spec[MAPPING_KEY]
+    static_info = None
+    if spec[STATIC_INFO_FKEY] is not None:
+        static_info = utils.load_specs(spec[STATIC_INFO_FKEY])
+    static_values = []
+
+    for inst_name, srv_name in inst_srv_mapping:
+        mapping = {'id': inst_name,
+                   'name': inst_name,
+                   'server_id': srv_name}
+        static_values.append(combine_data(
+            static_info, mapping, spec.get(EXTERNAL_INFO_KEY, None)))
+    return static_values
+
+
+def _get_trove_cluster_snapshot_driver_values(spec):
+    clust_inst_mapping = spec[MAPPING_KEY]
+    static_info = None
+    if spec[STATIC_INFO_FKEY] is not None:
+        static_info = utils.load_specs(spec[STATIC_INFO_FKEY])
+    static_values = []
+
+    for clust_name, inst_name in clust_inst_mapping:
+        mapping = {'id': clust_name,
+                   'name': clust_name,
+                   'instances': [
+                       {'id': inst_name, 'name': inst_name}
+                   ]}
+        static_values.append(combine_data(
+            static_info, mapping, spec.get(EXTERNAL_INFO_KEY, None)))
+    return static_values
+
+
 def _get_trans_host_snapshot_values(spec):
     """Generates the static driver values for each host.
 

vitrage/tests/resources/mock_configurations/driver/driver_trove_cluster_snapshot_dynamic.json

@@ -0,0 +1,19 @@
+{
+    "id": "tr-clust-0",
+    "name": "tr-clust-0",
+    "task": {
+        "id": 1,
+        "name": "NONE"
+    },
+    "instances": [
+        {
+            "id": "tr-inst-0",
+            "name": "tr-inst-0"
+        }
+    ],
+    "created": "2018-10-01T12:45:30Z",
+    "updated": "2018-10-01T12:46:00Z",
+    "vitrage_entity_type": "trove.cluster",
+    "vitrage_datasource_action": "snapshot",
+    "vitrage_sample_date": "2018-10-01 12:50:00.000000+00:00"
+}

vitrage/tests/resources/mock_configurations/driver/driver_trove_instance_snapshot_dynamic.json

@@ -0,0 +1,13 @@
+{
+    "id": "tr-inst-0",
+    "name": "tr-inst-0",
+    "status": "ACTIVE",
+    "server_id": "vm-0",
+    "volume_id": "volume-0",
+    "tenant_id": "tenant-0",
+    "created": "2018-10-01T12:45:30Z",
+    "updated": "2018-10-01T12:46:00Z",
+    "vitrage_entity_type": "trove.instance",
+    "vitrage_datasource_action": "snapshot",
+    "vitrage_sample_date": "2018-10-01 12:50:00.000000+00:00"
+}

vitrage/tests/unit/datasources/trove/test_trove_cluster_transformer.py

@@ -0,0 +1,151 @@
+# Copyright 2018 Samsung Electronics
+# All Rights Reserved.
+#
+#    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 datetime
+
+from oslo_config import cfg
+from oslo_log import log as logging
+from testtools import matchers
+
+from vitrage.common.constants import DatasourceOpts as DSOpts
+from vitrage.common.constants import DatasourceProperties as DSProps
+from vitrage.common.constants import EdgeLabel
+from vitrage.common.constants import EntityCategory
+from vitrage.common.constants import UpdateMethod
+from vitrage.common.constants import VertexProperties as VProps
+from vitrage.datasources import transformer_base as tb
+from vitrage.datasources.transformer_base import TransformerBase
+from vitrage.datasources.trove.cluster.transformer import \
+    TroveClusterTransformer
+from vitrage.datasources.trove.cluster import TROVE_CLUSTER_DATASOURCE
+from vitrage.datasources.trove.instance import TROVE_INSTANCE_DATASOURCE
+from vitrage.tests import base
+from vitrage.tests.mocks import mock_driver as mock_sync
+
+LOG = logging.getLogger(__name__)
+
+
+class TroveClusterTransformerTest(base.BaseTest):
+
+    OPTS = [
+        cfg.StrOpt(DSOpts.UPDATE_METHOD, default=UpdateMethod.PULL),
+    ]
+
+    @classmethod
+    def setUpClass(cls):
+        super(TroveClusterTransformerTest, cls).setUpClass()
+        cls.transformers = {}
+        cls.conf = cfg.ConfigOpts()
+        cls.conf.register_opts(cls.OPTS, group=TROVE_CLUSTER_DATASOURCE)
+        cls.transformers[TROVE_CLUSTER_DATASOURCE] = \
+            TroveClusterTransformer(cls.transformers, cls.conf)
+
+    def test_create_placeholder_vertex(self):
+        # Tests setup
+        cluster_id = 'tr-cluster-0'
+        timestamp = datetime.datetime.utcnow()
+
+        properties = {
+            VProps.ID: cluster_id,
+            VProps.VITRAGE_TYPE: TROVE_CLUSTER_DATASOURCE,
+            VProps.VITRAGE_CATEGORY: EntityCategory.RESOURCE,
+            VProps.VITRAGE_SAMPLE_TIMESTAMP: timestamp
+        }
+
+        transformer = self.transformers[TROVE_CLUSTER_DATASOURCE]
+
+        # Test action
+        placeholder = transformer.create_neighbor_placeholder_vertex(
+            **properties)
+
+        # Test assertions
+        expected_key = tb.build_key(
+            transformer._key_values(TROVE_CLUSTER_DATASOURCE, cluster_id))
+        expected_uuid = TransformerBase.uuid_from_deprecated_vitrage_id(
+            expected_key)
+        self.assertEqual(expected_uuid, placeholder.vertex_id)
+
+        self.assertEqual(timestamp,
+                         placeholder.get(VProps.VITRAGE_SAMPLE_TIMESTAMP))
+
+        self.assertEqual(TROVE_CLUSTER_DATASOURCE,
+                         placeholder.get(VProps.VITRAGE_TYPE))
+
+        self.assertEqual(cluster_id, placeholder.get(VProps.ID))
+
+        self.assertEqual(EntityCategory.RESOURCE,
+                         placeholder.get(VProps.VITRAGE_CATEGORY))
+
+        self.assertTrue(placeholder.get(VProps.VITRAGE_IS_PLACEHOLDER))
+
+    def test_snapshot_event_transform(self):
+        # Test setup
+        spec_list = mock_sync.simple_trove_cluster_generators(
+            clust_num=1, inst_num=1, snapshot_events=10)
+        events = mock_sync.generate_random_events_list(spec_list)
+
+        for event in events:
+            # Test action
+            transformer = self.transformers[TROVE_CLUSTER_DATASOURCE]
+            wrapper = transformer.transform(event)
+
+            # Test assertions
+            vertex = wrapper.vertex
+            self._validate_vertex_props(vertex, event)
+
+            neighbours = wrapper.neighbors
+            self.assertThat(neighbours, matchers.HasLength(1))
+            self._validate_server_neighbour(neighbours[0], vertex.vertex_id,
+                                            event)
+
+    def _validate_vertex_props(self, vertex, event):
+        self.assertEqual(event['id'], vertex[VProps.ID])
+
+        self.assertEqual(event['name'], vertex[VProps.NAME])
+
+        self.assertEqual(event['task']['name'], vertex[VProps.STATE])
+
+        self.assertEqual(event[DSProps.SAMPLE_DATE],
+                         vertex[VProps.VITRAGE_SAMPLE_TIMESTAMP])
+
+        self.assertEqual(EntityCategory.RESOURCE,
+                         vertex[VProps.VITRAGE_CATEGORY])
+
+        self.assertEqual(TROVE_CLUSTER_DATASOURCE,
+                         vertex[VProps.VITRAGE_TYPE])
+
+        self.assertFalse(vertex[VProps.VITRAGE_IS_PLACEHOLDER])
+        self.assertFalse(vertex[VProps.VITRAGE_IS_DELETED])
+
+    def _validate_server_neighbour(self, neighbour, cluster_id, event):
+        vertex, edge = neighbour.vertex, neighbour.edge
+
+        # Validate neighbor vertex
+        self.assertEqual(EntityCategory.RESOURCE,
+                         vertex[VProps.VITRAGE_CATEGORY])
+
+        self.assertEqual(TROVE_INSTANCE_DATASOURCE,
+                         vertex[VProps.VITRAGE_TYPE])
+
+        instance_id = event['instances'][0]['id']
+        self.assertEqual(instance_id, vertex[VProps.ID])
+
+        self.assertTrue(vertex[VProps.VITRAGE_IS_PLACEHOLDER])
+        self.assertFalse(vertex[VProps.VITRAGE_IS_DELETED])
+
+        # Validate neighbor edge
+        self.assertEqual(edge.target_id, vertex.vertex_id)
+        self.assertEqual(edge.source_id, cluster_id)
+        self.assertEqual(edge.label, EdgeLabel.CONTAINS)

vitrage/tests/unit/datasources/trove/test_trove_instance_transformer.py

@@ -0,0 +1,151 @@
+# Copyright 2018 Samsung Electronics
+# All Rights Reserved.
+#
+#    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 datetime
+
+from oslo_config import cfg
+from oslo_log import log as logging
+from testtools import matchers
+
+from vitrage.common.constants import DatasourceOpts as DSOpts
+from vitrage.common.constants import DatasourceProperties as DSProps
+from vitrage.common.constants import EdgeLabel
+from vitrage.common.constants import EntityCategory
+from vitrage.common.constants import UpdateMethod
+from vitrage.common.constants import VertexProperties as VProps
+from vitrage.datasources.nova.instance import NOVA_INSTANCE_DATASOURCE
+from vitrage.datasources import transformer_base as tb
+from vitrage.datasources.transformer_base import TransformerBase
+from vitrage.datasources.trove.instance.transformer import \
+    TroveInstanceTransformer
+from vitrage.datasources.trove.instance import TROVE_INSTANCE_DATASOURCE
+from vitrage.tests import base
+from vitrage.tests.mocks import mock_driver as mock_sync
+
+LOG = logging.getLogger(__name__)
+
+
+class TroveInstanceTransformerTest(base.BaseTest):
+
+    OPTS = [
+        cfg.StrOpt(DSOpts.UPDATE_METHOD, default=UpdateMethod.PULL),
+    ]
+
+    @classmethod
+    def setUpClass(cls):
+        super(TroveInstanceTransformerTest, cls).setUpClass()
+        cls.transformers = {}
+        cls.conf = cfg.ConfigOpts()
+        cls.conf.register_opts(cls.OPTS, group=TROVE_INSTANCE_DATASOURCE)
+        cls.transformers[TROVE_INSTANCE_DATASOURCE] = \
+            TroveInstanceTransformer(cls.transformers, cls.conf)
+
+    def test_create_placeholder_vertex(self):
+        # Tests setup
+        instance_id = 'tr-instance-0'
+        timestamp = datetime.datetime.utcnow()
+
+        properties = {
+            VProps.ID: instance_id,
+            VProps.VITRAGE_TYPE: TROVE_INSTANCE_DATASOURCE,
+            VProps.VITRAGE_CATEGORY: EntityCategory.RESOURCE,
+            VProps.VITRAGE_SAMPLE_TIMESTAMP: timestamp
+        }
+
+        transformer = self.transformers[TROVE_INSTANCE_DATASOURCE]
+
+        # Test action
+        placeholder = transformer.create_neighbor_placeholder_vertex(
+            **properties)
+
+        # Test assertions
+        expected_key = tb.build_key(
+            transformer._key_values(TROVE_INSTANCE_DATASOURCE, instance_id))
+        expected_uuid = TransformerBase.uuid_from_deprecated_vitrage_id(
+            expected_key)
+        self.assertEqual(expected_uuid, placeholder.vertex_id)
+
+        self.assertEqual(timestamp,
+                         placeholder.get(VProps.VITRAGE_SAMPLE_TIMESTAMP))
+
+        self.assertEqual(TROVE_INSTANCE_DATASOURCE,
+                         placeholder.get(VProps.VITRAGE_TYPE))
+
+        self.assertEqual(instance_id, placeholder.get(VProps.ID))
+
+        self.assertEqual(EntityCategory.RESOURCE,
+                         placeholder.get(VProps.VITRAGE_CATEGORY))
+
+        self.assertTrue(placeholder.get(VProps.VITRAGE_IS_PLACEHOLDER))
+
+    def test_snapshot_event_transform(self):
+        # Test setup
+        spec_list = mock_sync.simple_trove_instance_generators(
+            inst_num=1, snapshot_events=10)
+        events = mock_sync.generate_random_events_list(spec_list)
+
+        for event in events:
+            # Test action
+            transformer = self.transformers[TROVE_INSTANCE_DATASOURCE]
+            wrapper = transformer.transform(event)
+
+            # Test assertions
+            vertex = wrapper.vertex
+            self._validate_vertex_props(vertex, event)
+
+            neighbours = wrapper.neighbors
+            self.assertThat(neighbours, matchers.HasLength(1))
+            self._validate_server_neighbour(neighbours[0], vertex.vertex_id,
+                                            event)
+
+    def _validate_vertex_props(self, vertex, event):
+        self.assertEqual(event['id'], vertex[VProps.ID])
+
+        self.assertEqual(event['name'], vertex[VProps.NAME])
+
+        self.assertEqual(event['status'], vertex[VProps.STATE])
+
+        self.assertEqual(event['tenant_id'], vertex[VProps.PROJECT_ID])
+
+        self.assertEqual(event[DSProps.SAMPLE_DATE],
+                         vertex[VProps.VITRAGE_SAMPLE_TIMESTAMP])
+
+        self.assertEqual(EntityCategory.RESOURCE,
+                         vertex[VProps.VITRAGE_CATEGORY])
+
+        self.assertEqual(TROVE_INSTANCE_DATASOURCE,
+                         vertex[VProps.VITRAGE_TYPE])
+
+        self.assertFalse(vertex[VProps.VITRAGE_IS_PLACEHOLDER])
+        self.assertFalse(vertex[VProps.VITRAGE_IS_DELETED])
+
+    def _validate_server_neighbour(self, neighbour, instance_id, event):
+        vertex, edge = neighbour.vertex, neighbour.edge
+
+        # Validate neighbor vertex
+        self.assertEqual(EntityCategory.RESOURCE,
+                         vertex[VProps.VITRAGE_CATEGORY])
+
+        self.assertEqual(NOVA_INSTANCE_DATASOURCE, vertex[VProps.VITRAGE_TYPE])
+
+        self.assertEqual(event['server_id'], vertex[VProps.ID])
+
+        self.assertTrue(vertex[VProps.VITRAGE_IS_PLACEHOLDER])
+        self.assertFalse(vertex[VProps.VITRAGE_IS_DELETED])
+
+        # Validate neighbor edge
+        self.assertEqual(edge.target_id, vertex.vertex_id)
+        self.assertEqual(edge.source_id, instance_id)
+        self.assertEqual(edge.label, EdgeLabel.CONTAINS)