support for not operator in templates condition

Change-Id: I434b1967ee0cb91b54ab93e680a2a11bab3f8c3e

doc/source/not_operator_support.rst

@@ -0,0 +1,310 @@
+==============================
+Templates Not Operator Support
+==============================
+
+Overview
+--------
+
+The Templates language supports the "or" and "and" operators at the moment.
+Many scenarios can't be described by using only those two operators and thus
+we would like to add support for "not" operator as well.
+
+
+Template Structure
+==================
+The template is written in YAML language, with the following structure.
+ ::
+
+  metadata:
+    name: <unique template identifier>
+    description: <what this template does>
+  definitions:
+    entities:
+        - entity: ...
+        - entity: ...
+    relationships:
+        - relationship: ...
+        - relationship: ...
+  scenarios:
+      - scenario:
+          condition: <if statement true do the action>
+          actions:
+              - action: ...
+
+
+All the sections are in use as described in the "vitrage-template-format.rst" file.
+But in the condition section it will be possible to write the "not" operator in addition to the "and" and "or" operators.
+The "not" operator can be used only before a relationship expression.
+
+
+Condition Format
+----------------
+The condition which needs to be met will be phrased using the entities and
+relationships previously defined. The condition details are described in the
+"vitrage-template-format.rst" and the addition here is the new logical operator "not":
+
+- "not" - indicates that the expression must not be satisfied in order for the
+  condition to be met.
+
+The following are examples of valid expressions, where X, Y and Z are
+relationships:
+
+- X
+- X and Y
+- X and Y and Z
+- X and not Y
+- X and not (Y or Z)
+- X and not X
+
+
+Supported Use Cases
+===================
+
+Use Case 1:
+-----------
+There exists an instance on Host but there is no Alarm on the instance.
+
+
++--------+         +--------+    Not    +---------+
+|  Host  | ------> |   Vm   | < - - - - |  Alarm  |
++--------+         +--------+           +---------+
+
+ ::
+
+    metadata:
+        name: no_alarm_on_instance_that_contained_in_host
+        description: when host contains vm that has no alarm on it, show implications on the host
+    definitions:
+        entities:
+            - entity:
+                category: ALARM
+                type: instance_mem_performance_problem
+                template_id: instance_alarm # some string
+            - entity:
+                category: RESOURCE
+                type: nova.host
+                template_id: host
+            - entity:
+                category: RESOURCE
+                type: nova.instance
+                template_id: instance
+        relationships:
+            - relationship:
+                source: instance_alarm
+                target: instance
+                relationship_type: on
+                template_id : alarm_on_instance
+            - relationship:
+                source: host
+                target: instance
+                relationship_type: contains
+                template_id : host_contains_instance
+    scenarios:
+        - scenario:
+            condition: host_contains_instance and not alarm_on_instance
+            actions:
+                - action:
+                   action_type: set_state
+                   properties:
+                      state: available
+                   action_target:
+                      target: host
+
+
+Use Case 2:
+-----------
+
+There exists a host with no alarm.
+
++--------+    Not    +---------+
+|  Host  | < - - - - |  Alarm  |
++--------+           +---------+
+
+ ::
+
+    metadata:
+        name: no_alarm_on_host
+        description: when there is no alarm on the host, show implications on the host
+    definitions:
+        entities:
+            - entity:
+                category: ALARM
+                type: host_high_mem_load
+                template_id: host_alarm # some string
+            - entity:
+                category: RESOURCE
+                type: nova.host
+                template_id: host
+        relationships:
+            - relationship:
+                source: host_alarm  # source and target from entities section
+                target: host
+                relationship_type: on
+                template_id : alarm_on_host
+    scenarios:
+        - scenario:
+            condition: not alarm_on_host
+            actions:
+                - action:
+                   action_type: set_state
+                   properties:
+                      state: available
+                   action_target:
+                      target: instance
+
+
+Use Case 3:
+-----------
+
+The Switch is attached to a Host that contains a Vm.
+The Switch is also comprised to a Network which has a Port.
+There is no edge between the Vm and the Port.
+
+                  +---------+           +---------+
+     +----------- |  Host   | --------> |   Vm    |
+     |            +---------+           +---------+
+     |
+     v                                       |
++----------+                                   N
+|  Switch  |                                 | o
++----------+                                   t
+                                             |
+     |                                       v
+     |
+     |            +---------+            +---------+
+     +----------> | Network | <--------- |  Port   |
+                  +---------+            +---------+
+
+ ::
+
+    metadata:
+        name: no_connection_between_vm_and_port
+        description: when there is no edge between the port and the vm, show implications on the instances
+    definitions:
+        entities:
+            - entity:
+                category: RESOURCE
+                type: nova.host
+                template_id: host
+            - entity:
+                category: RESOURCE
+                type: nova.instance
+                template_id: instance
+            - entity:
+                category: RESOURCE
+                type: switch
+                template_id: switch
+            - entity:
+                category: RESOURCE
+                type: neutron.network
+                template_id: network
+            - entity:
+                category: RESOURCE
+                type: neutron.port
+                template_id: port
+        relationships:
+            - relationship:
+                source: host
+                target: instance
+                relationship_type: contains
+                template_id : host_contains_instance
+            - relationship:
+                source: switch
+                target: host
+                relationship_type: connected
+                template_id : host_connected_switch
+            - relationship:
+                source: switch
+                target: network
+                relationship_type: has
+                template_id : switch_has_network
+            - relationship:
+                source: port
+                target: network
+                relationship_type: attached
+                template_id : port_attached_network
+            - relationship:
+                source: vm
+                target: port
+                relationship_type: connected
+                template_id : vm_connected_port
+    scenarios:
+        - scenario:
+            condition: host_contains_instance and host_connected_switch and switch_has_network and port_attached_network and not vm_connected_port
+            actions:
+                - action:
+                   action_type: raise_alarm
+                   properties:
+                      alarm_name: instance_mem_performance_problem
+                      severity: warning
+                   action_target:
+                      target: instance
+
+
+
+Unsupported Use Cases
+=====================
+
+Use Case 1:
+-----------
+
+There is a Host contains Vm, which has no edge ("connection") to a stack that has an alarm on it.
+Difference: The difference here from the graphs above, is that here there are
+two connected component subgraphs (the first is host contains vm, the second is alarm on stack),
+and the current mechanism doesn't support such a use case of not operator between many connected component subgraphs.
+In the subgraphs above, we had only one vertex which was not connected to the main connected component subgraph.
+
+
++---------+           +---------+      Not       +---------+            +---------+
+|  Host   | --------> |   Vm    |  - - - - - ->  |  Stack  | <--------- |  Alarm  |
++---------+           +---------+                +---------+            +---------+
+
+ ::
+
+    metadata:
+        name: host_contains_vm_with_no_edge_to_stack_that_has_alarm_on_it
+        description: when host contains vm without and edge to a stack that has no alarms, show implications on the instances
+    definitions:
+        entities:
+            - entity:
+                category: RESOURCE
+                type: nova.host
+                template_id: host
+            - entity:
+                category: RESOURCE
+                type: nova.instance
+                template_id: instance
+            - entity:
+                category: RESOURCE
+                type: heat.stack
+                template_id: stack
+            - entity:
+                category: ALARM
+                type: stack_high_mem_load
+                template_id: stack_alarm
+        relationships:
+            - relationship:
+                source: host
+                target: instance
+                relationship_type: contains
+                template_id : host_contains_instance
+            - relationship:
+                source: stack_alarm
+                target: stack
+                relationship_type: on
+                template_id : alarm_on_stack
+            - relationship:
+                source: instance
+                target: stack
+                relationship_type: attached
+                template_id : instance_attached_stack
+    scenarios:
+        - scenario:
+            condition: host_contains_instance and alarm_on_stack and not instance_attached_stack
+            actions:
+                - action:
+                   action_type: set_state
+                   properties:
+                      state: available
+                   action_target:
+                      target: instance

vitrage/common/constants.py

@@ -111,7 +111,7 @@ class NotifierEventTypes(object):
     DEACTIVATE_MARK_DOWN_EVENT = 'vitrage.mark_down.deactivate'
 
 
-class TopologyFields(object):
+class TemplateTopologyFields(object):
     """yaml fields for topology definitions"""
     METADATA = 'metadata'
     DESCRIPTION = 'description'

vitrage/datasources/static/__init__.py

@@ -14,7 +14,6 @@
 
 from oslo_config import cfg
 from vitrage.common.constants import DatasourceOpts as DSOpts
-from vitrage.common.constants import TopologyFields
 from vitrage.common.constants import UpdateMethod
 
 STATIC_DATASOURCE = 'static'
@@ -48,5 +47,16 @@ OPTS = [
                help='static data sources configuration directory')]
 
 
-class StaticFields(TopologyFields):
+class StaticFields(object):
+    """yaml fields for static definitions"""
+    METADATA = 'metadata'
+    DEFINITIONS = 'definitions'
+    RELATIONSHIPS = 'relationships'
+    ENTITIES = 'entities'
+    RELATIONSHIP_TYPE = 'relationship_type'
+    SOURCE = 'source'
+    TARGET = 'target'
     STATIC_ID = 'static_id'
+    TYPE = 'type'
+    ID = 'id'
+    NAME = 'name'

vitrage/datasources/static/driver.py

@@ -18,8 +18,6 @@ from six.moves import reduce
 
 from oslo_log import log
 
-from vitrage.common.constants import TopologyFields
-from vitrage.common.constants import VertexProperties as VProps
 from vitrage.datasources.driver_base import DriverBase
 from vitrage.datasources.static import STATIC_DATASOURCE
 from vitrage.datasources.static import StaticFields
@@ -30,7 +28,7 @@ LOG = log.getLogger(__name__)
 
 class StaticDriver(DriverBase):
     # base fields are required for all entities, others are treated as metadata
-    BASE_FIELDS = {StaticFields.STATIC_ID, StaticFields.TYPE, VProps.ID}
+    BASE_FIELDS = {StaticFields.STATIC_ID, StaticFields.TYPE, StaticFields.ID}
 
     def __init__(self, conf):
         super(StaticDriver, self).__init__()
@@ -40,7 +38,7 @@ class StaticDriver(DriverBase):
     def _is_valid_config(config):
         """check for validity of configuration"""
         # TODO(yujunz) check with yaml schema or reuse template validation
-        return TopologyFields.DEFINITIONS in config
+        return StaticFields.DEFINITIONS in config
 
     @staticmethod
     def get_event_types():
@@ -77,10 +75,10 @@ class StaticDriver(DriverBase):
                         .format(path))
             return []
 
-        definitions = config[TopologyFields.DEFINITIONS]
+        definitions = config[StaticFields.DEFINITIONS]
 
-        entities = definitions[TopologyFields.ENTITIES]
+        entities = definitions[StaticFields.ENTITIES]
-        relationships = definitions[TopologyFields.RELATIONSHIPS]
+        relationships = definitions[StaticFields.RELATIONSHIPS]
 
         return cls._pack(entities, relationships)
 
@@ -100,22 +98,23 @@ class StaticDriver(DriverBase):
             metadata = {key: value for key, value in iteritems(entity)
                         if key not in cls.BASE_FIELDS}
             entities_dict[static_id] = entity
-            entity[TopologyFields.RELATIONSHIPS] = []
+            entity[StaticFields.RELATIONSHIPS] = []
-            entity[TopologyFields.METADATA] = metadata
+            entity[StaticFields.METADATA] = metadata
         else:
             LOG.warning("Skipped duplicated entity: {}".format(entity))
 
     @classmethod
     def _pack_rel(cls, entities_dict, rel):
-        source_id = rel[TopologyFields.SOURCE]
+        source_id = rel[StaticFields.SOURCE]
-        target_id = rel[TopologyFields.TARGET]
+        target_id = rel[StaticFields.TARGET]
 
         if source_id == target_id:
             # self pointing relationship
-            entities_dict[source_id][TopologyFields.RELATIONSHIPS].append(rel)
+            entities_dict[source_id]
+            [StaticFields.RELATIONSHIPS].append(rel)
         else:
             source, target = entities_dict[source_id], entities_dict[target_id]
-            source[TopologyFields.RELATIONSHIPS].append(
+            source[StaticFields.RELATIONSHIPS].append(
                 cls._expand_neighbor(rel, target))
 
     @staticmethod

vitrage/datasources/static/transformer.py

@@ -18,7 +18,6 @@ from oslo_log import log as logging
 
 from vitrage.common.constants import DatasourceProperties as DSProps
 from vitrage.common.constants import EntityCategory
-from vitrage.common.constants import TopologyFields
 from vitrage.common.constants import VertexProperties as VProps
 from vitrage.datasources.resource_transformer_base import \
     ResourceTransformerBase
@@ -58,7 +57,7 @@ class StaticTransformer(ResourceTransformerBase):
         return STATIC_DATASOURCE
 
     def _create_vertex(self, entity_event):
-        metadata = entity_event.get(TopologyFields.METADATA, {})
+        metadata = entity_event.get(StaticFields.METADATA, {})
 
         entity_type = entity_event[VProps.TYPE]
         entity_id = entity_event[VProps.ID]
@@ -101,13 +100,15 @@ class StaticTransformer(ResourceTransformerBase):
             return None
         if rel[StaticFields.SOURCE] == rel[StaticFields.TARGET]:
             neighbor = entity_event
-        return self._create_neighbor(entity_event,
+        return self._create_neighbor(
+            entity_event,
             neighbor[VProps.ID],
             neighbor[VProps.TYPE],
-                                     rel[TopologyFields.RELATIONSHIP_TYPE],
+            rel[StaticFields.RELATIONSHIP_TYPE],
             is_entity_source=is_entity_source)
 
     def _create_static_neighbors(self, entity_event):
-        relationships = entity_event.get(TopologyFields.RELATIONSHIPS, [])
+        relationships = entity_event.get(StaticFields.RELATIONSHIPS,
+                                         [])
         return [self._create_static_neighbor(entity_event, rel)
                 for rel in relationships]

vitrage/evaluator/scenario_evaluator.py

@@ -26,9 +26,9 @@ from vitrage.evaluator.actions.base import ActionType
 import vitrage.evaluator.actions.priority_tools as pt
 from vitrage.evaluator.template_data import ActionSpecs
 from vitrage.evaluator.template_data import EdgeDescription
-from vitrage.evaluator.template_data import ENTITY
 from vitrage.graph.algo_driver.algorithm import Mapping
-from vitrage.graph.driver.networkx_graph import NXGraph
+from vitrage.graph.algo_driver.sub_graph_matching import \
+    NEG_CONDITION
 from vitrage.graph.driver import Vertex
 
 LOG = log.getLogger(__name__)
@@ -87,7 +87,6 @@ class ScenarioEvaluator(object):
                   str(before),
                   str(current))
 
-        # todo (erosensw): support for NOT conditions - reverse logic
         before_scenarios = self._get_element_scenarios(before, is_vertex)
         current_scenarios = self._get_element_scenarios(current, is_vertex)
         before_scenarios, current_scenarios = \
@@ -157,15 +156,52 @@ class ScenarioEvaluator(object):
         actions = {}
         for action in scenario.actions:
             for scenario_element in scenario_elements:
-                matches = self._evaluate_full_condition(scenario.condition,
+                matches = self._evaluate_subgraphs(scenario.subgraphs,
+                                                   element,
+                                                   scenario_element,
+                                                   action.targets['target'])
+
+                actions.update(self._get_actions_from_matches(matches,
+                                                              mode,
+                                                              action,
+                                                              scenario))
+
+        return actions
+
+    def _evaluate_subgraphs(self,
+                            subgraphs,
+                            element,
+                            scenario_element,
+                            action_target):
+        if isinstance(element, Vertex):
+            return self._find_vertex_subgraph_matching(subgraphs,
+                                                       action_target,
                                                        element,
                                                        scenario_element)
-                if matches:
+        else:
+            return self._find_edge_subgraph_matching(subgraphs,
+                                                     action_target,
+                                                     element,
+                                                     scenario_element)
+
+    def _get_actions_from_matches(self,
+                                  combined_matches,
+                                  mode,
+                                  action_spec,
+                                  scenario):
+        actions = {}
+        for is_switch_mode, matches in combined_matches:
+            new_mode = mode
+            if is_switch_mode:
+                new_mode = ActionMode.UNDO \
+                    if mode == ActionMode.DO else ActionMode.DO
+
             for match in matches:
-                        spec, action_id = self._get_action_spec(action, match)
+                spec, action_id = self._get_action_spec(action_spec, match)
                 match_hash = hash(tuple(sorted(match.items())))
-                        actions[action_id] = \
+                actions[action_id] = ActionInfo(spec, new_mode,
-                            ActionInfo(spec, mode, scenario.id, match_hash)
+                                                scenario.id, match_hash)
+
         return actions
 
     @staticmethod
@@ -190,53 +226,6 @@ class ScenarioEvaluator(object):
              tuple(sorted(action_spec.properties.items())))
         )
 
-    def _evaluate_full_condition(self, condition, element, scenario_element):
-        condition_matches = []
-        for clause in condition:
-            # OR condition means aggregation of matches, without duplicates
-            and_condition_matches = \
-                self._evaluate_and_condition(clause, element, scenario_element)
-            condition_matches += and_condition_matches
-
-        return condition_matches
-
-    def _evaluate_and_condition(self, condition, element, scenario_element):
-
-        condition_g = NXGraph("scenario condition")
-        for term in condition:
-            if not term.positive:
-                # todo(erosensw): add support for NOT clauses
-                LOG.error('Template with NOT operator current not supported')
-                return []
-
-            if term.type == ENTITY:
-                term.variable[VProps.IS_DELETED] = False
-                condition_g.add_vertex(term.variable)
-
-            else:  # type = relationship
-                edge_desc = term.variable
-                self._set_relationship_not_deleted(edge_desc)
-                self._add_relationship(condition_g, edge_desc)
-
-        if isinstance(element, Vertex):
-            initial_map = Mapping(scenario_element, element, True)
-        else:
-            initial_map = Mapping(scenario_element.edge, element, False)
-        return self._entity_graph.algo.sub_graph_matching(condition_g,
-                                                          [initial_map])
-
-    @staticmethod
-    def _set_relationship_not_deleted(edge_description):
-        edge_description.source[VProps.IS_DELETED] = False
-        edge_description.target[VProps.IS_DELETED] = False
-        edge_description.edge[EProps.IS_DELETED] = False
-
-    @staticmethod
-    def _add_relationship(condition_graph, edge_description):
-        condition_graph.add_vertex(edge_description.source)
-        condition_graph.add_vertex(edge_description.target)
-        condition_graph.add_edge(edge_description.edge)
-
     def _analyze_and_filter_actions(self, actions):
 
         actions_to_perform = {}
@@ -260,6 +249,102 @@ class ScenarioEvaluator(object):
                 actions_to_perform[key] = new_dominant
         return actions_to_perform.values()
 
+    def _find_vertex_subgraph_matching(self,
+                                       subgraphs,
+                                       action_target,
+                                       vertex,
+                                       scenario_vertex):
+        """calculates subgraph matching for vertex
+
+        iterates over all the subgraphs, and checks if the triggered vertex is
+        in the same connected component as the action then run subgraph
+        matching on the vertex and return its result, otherwise return an
+        empty list of matches.
+        """
+
+        matches = []
+        for subgraph in subgraphs:
+            connected_component = subgraph.algo.graph_query_vertices(
+                root_id=action_target,
+                edge_query_dict={'!=': {NEG_CONDITION: True}})
+
+            is_switch_mode = \
+                connected_component.get_vertex(scenario_vertex.vertex_id)
+
+            if is_switch_mode:
+                initial_map = Mapping(scenario_vertex, vertex, True)
+                mat = self._entity_graph.algo.sub_graph_matching(subgraph,
+                                                                 initial_map)
+                matches.append((False, mat))
+            else:
+                matches.append((True, []))
+        return matches
+
+    def _find_edge_subgraph_matching(self,
+                                     subgraphs,
+                                     action_target,
+                                     vertex,
+                                     scenario_edge):
+        """calculates subgraph matching for edge
+
+        iterates over all the subgraphs, and checks if the triggered edge is a
+        negative edge then mark it as deleted=false and negative=false so that
+        subgraph matching on that edge will work correctly. after running
+        subgraph matching, we need to remove the negative vertices that were
+        added due to the change above.
+        """
+
+        matches = []
+        for subgraph in subgraphs:
+            is_switch_mode = \
+                subgraph.get_edge(scenario_edge.source.vertex_id,
+                                  scenario_edge.target.vertex_id,
+                                  scenario_edge.edge.label).get(NEG_CONDITION,
+                                                                False)
+
+            connected_component = subgraph.algo.graph_query_vertices(
+                root_id=action_target,
+                edge_query_dict={'!=': {NEG_CONDITION: True}})
+
+            # change the is_deleted and negative_condition props to false when
+            # is_switch_mode=true so that when we have an event on a
+            # negative_condition=true edge it will find the correct subgraph
+            self._switch_edge_negative_props(is_switch_mode, scenario_edge,
+                                             subgraph, False)
+
+            initial_map = Mapping(scenario_edge.edge, vertex, False)
+            curr_matches = \
+                self._entity_graph.algo.sub_graph_matching(subgraph,
+                                                           initial_map)
+
+            # switch back to the original values
+            self._switch_edge_negative_props(is_switch_mode, scenario_edge,
+                                             subgraph, True)
+
+            self._remove_negative_vertices_from_matches(curr_matches,
+                                                        connected_component)
+
+            matches.append((is_switch_mode, curr_matches))
+        return matches
+
+    @staticmethod
+    def _switch_edge_negative_props(is_switch_mode,
+                                    scenario_edge,
+                                    subgraph,
+                                    status):
+        if is_switch_mode:
+            scenario_edge.edge[NEG_CONDITION] = status
+            scenario_edge.edge[EProps.IS_DELETED] = status
+            subgraph.update_edge(scenario_edge.edge)
+
+    @staticmethod
+    def _remove_negative_vertices_from_matches(matches, connected_component):
+        for match in matches:
+            ver_ids = [v.vertex_id for v in connected_component.get_vertices()]
+            ver_to_remove = [id for id in match.keys() if id not in ver_ids]
+            for v_id in ver_to_remove:
+                del match[v_id]
+
 
 class ActionTracker(object):
     """Keeps track of all active actions and relative dominance/priority.

vitrage/evaluator/template_data.py

@@ -11,6 +11,7 @@
 # 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 collections import namedtuple
 from sympy.logic.boolalg import And
 from sympy.logic.boolalg import Not
@@ -19,14 +20,17 @@ from sympy.logic.boolalg import to_dnf as sympy_to_dfn
 from sympy import Symbol
 
 
+from vitrage.common.constants import EdgeProperties as EProps
+from vitrage.common.constants import VertexProperties as VProps
 from vitrage.evaluator.template_fields import TemplateFields as TFields
+from vitrage.graph.algo_driver.sub_graph_matching import NEG_CONDITION
+from vitrage.graph.driver.networkx_graph import NXGraph
 from vitrage.graph import Edge
 from vitrage.graph import Vertex
 
-
 ConditionVar = namedtuple('ConditionVar', ['variable', 'type', 'positive'])
 ActionSpecs = namedtuple('ActionSpecs', ['type', 'targets', 'properties'])
-Scenario = namedtuple('Scenario', ['id', 'condition', 'actions'])
+Scenario = namedtuple('Scenario', ['id', 'condition', 'actions', 'subgraphs'])
 EdgeDescription = namedtuple('EdgeDescription', ['edge', 'source', 'target'])
 
 
@@ -132,12 +136,13 @@ class TemplateData(object):
 
         scenarios = []
         for counter, scenarios_def in enumerate(scenarios_defs):
-
             scenario_dict = scenarios_def[TFields.SCENARIO]
             condition = self._parse_condition(scenario_dict[TFields.CONDITION])
             action_specs = self._build_actions(scenario_dict[TFields.ACTIONS])
+            subgraphs = self._build_subgraphs(condition)
             scenario_id = "%s-scenario%s" % (self.name, str(counter))
-            scenarios.append(Scenario(scenario_id, condition, action_specs))
+            scenarios.append(Scenario(scenario_id, condition,
+                                      action_specs, subgraphs))
 
         return scenarios
 
@@ -156,6 +161,41 @@ class TemplateData(object):
 
         return actions
 
+    def _build_subgraphs(self, condition):
+        return [self._build_subgraph(clause) for clause in condition]
+
+    def _build_subgraph(self, clause):
+        condition_g = NXGraph("scenario condition")
+
+        for term in clause:
+            if term.type == ENTITY:
+                term.variable[VProps.IS_DELETED] = False
+                condition_g.add_vertex(term.variable)
+
+            else:  # type = relationship
+                edge_desc = term.variable
+                self._set_edge_relationship_info(edge_desc, term.positive)
+                self._add_edge_relationship(condition_g, edge_desc)
+
+        return condition_g
+
+    @staticmethod
+    def _set_edge_relationship_info(edge_description, is_positive_condition):
+        if not is_positive_condition:
+            edge_description.edge[NEG_CONDITION] = True
+            edge_description.edge[EProps.IS_DELETED] = True
+        else:
+            edge_description.edge[EProps.IS_DELETED] = False
+
+        edge_description.source[VProps.IS_DELETED] = False
+        edge_description.target[VProps.IS_DELETED] = False
+
+    @staticmethod
+    def _add_edge_relationship(condition_graph, edge_description):
+        condition_graph.add_vertex(edge_description.source)
+        condition_graph.add_vertex(edge_description.target)
+        condition_graph.add_edge(edge_description.edge)
+
     def _parse_condition(self, condition_str):
         """Parse condition string into an object
 
@@ -181,7 +221,7 @@ class TemplateData(object):
             return [self._extract_and_condition(condition_dnf)]
 
         if isinstance(condition_dnf, Not):
-            return [[(self._extract_condition_var(condition_dnf, False))]]
+            return [(self._extract_not_condition_var(condition_dnf))]
 
         if isinstance(condition_dnf, Symbol):
             return [[(self._extract_condition_var(condition_dnf, True))]]
@@ -213,8 +253,14 @@ class TemplateData(object):
         return [self._extract_condition_var(arg, isinstance(arg, Symbol))
                 for arg in and_condition.args]
 
-    def _extract_condition_var(self, symbol, positive):
+    def _extract_not_condition_var(self, not_condition):
+        return [self._extract_condition_var(arg, False)
+                for arg in not_condition.args]
 
+    def _extract_condition_var(self, symbol, positive):
+        if isinstance(symbol, Not):
+            return self._extract_not_condition_var(symbol)[0]
+        else:
             var, var_type = self._extract_var(str(symbol))
         return ConditionVar(var, var_type, positive)
 

vitrage/evaluator/template_fields.py

@@ -12,10 +12,10 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from vitrage.common.constants import TopologyFields
+from vitrage.common.constants import TemplateTopologyFields
 
 
-class TemplateFields(TopologyFields):
+class TemplateFields(TemplateTopologyFields):
 
     SCENARIOS = 'scenarios'
 

vitrage/graph/algo_driver/networkx_algorithm.py

@@ -17,7 +17,10 @@ from networkx.algorithms import simple_paths
 
 from oslo_log import log as logging
 
+from vitrage.common.constants import EdgeProperties as EProps
 from vitrage.graph.algo_driver.algorithm import GraphAlgorithm
+from vitrage.graph.algo_driver.algorithm import Mapping
+from vitrage.graph.algo_driver.sub_graph_matching import NEG_CONDITION
 from vitrage.graph.algo_driver.sub_graph_matching import subgraph_matching
 from vitrage.graph.driver import Direction
 from vitrage.graph.driver import Edge
@@ -97,23 +100,41 @@ class NXAlgorithm(GraphAlgorithm):
                   str(self.graph._g.edges(data=True)))
         return graph
 
-    @staticmethod
+    def sub_graph_matching(self,
-    def _edge_result_to_list(edge_result):
+                           subgraph,
-        d = dict()
+                           known_match,
-        for source_id, target_id, label, data in edge_result:
+                           validate=False):
-            d[(source_id, target_id, label)] = \
+        """Finds all the matching subgraphs in the graph
-                Edge(source_id, target_id, label, properties=data)
-        return d.values()
 
-    @staticmethod
+        In case the known_match has a subgraph edge with property
-    def _vertex_result_to_list(vertex_result):
+        "negative_condition" then run subgraph matching on the edge vertices
-        d = dict()
+        and unite the results.
-        for v_id, data in vertex_result:
+        Otherwise just run subgraph matching and return its result.
-            d[v_id] = Vertex(vertex_id=v_id, properties=data)
-        return d.values()
 
-    def sub_graph_matching(self, subgraph, known_matches, validate=False):
+        :param subgraph: the subgraph to match
-        return subgraph_matching(self.graph, subgraph, known_matches, validate)
+        :param known_match: starting point at the subgraph and the graph
+        :param validate:
+        :return: all the matching subgraphs in the graph
+        """
+        sge = known_match.subgraph_element
+        ge = known_match.graph_element
+
+        if not known_match.is_vertex and sge.get(NEG_CONDITION):
+            source_matches = self._filtered_subgraph_matching(ge.source_id,
+                                                              sge.source_id,
+                                                              subgraph,
+                                                              validate)
+            target_matches = self._filtered_subgraph_matching(ge.target_id,
+                                                              sge.target_id,
+                                                              subgraph,
+                                                              validate)
+
+            return self._list_union(source_matches, target_matches)
+        else:
+            return subgraph_matching(self.graph,
+                                     subgraph,
+                                     [known_match],
+                                     validate)
 
     def create_graph_from_matching_vertices(self,
                                             vertex_attr_filter=None,
@@ -159,3 +180,53 @@ class NXAlgorithm(GraphAlgorithm):
         return simple_paths.all_simple_paths(self.graph._g,
                                              source=source,
                                              target=target)
+
+    def _filtered_subgraph_matching(self,
+                                    ge_v_id,
+                                    sge_v_id,
+                                    subgraph,
+                                    validate):
+        """Runs subgraph_matching on edges vertices with filtering
+
+        Runs subgraph_matching on edges vertices after checking if that vertex
+        has real neighbors in the entity graph.
+        """
+        if self.graph.neighbors(ge_v_id,
+                                edge_attr_filter={EProps.IS_DELETED: False}):
+            template_vertex = subgraph.get_vertex(sge_v_id)
+            graph_vertex = self.graph.get_vertex(ge_v_id)
+            match = Mapping(template_vertex, graph_vertex, True)
+            return subgraph_matching(self.graph, subgraph, [match], validate)
+
+        return []
+
+    @staticmethod
+    def _edge_result_to_list(edge_result):
+        d = dict()
+        for source_id, target_id, label, data in edge_result:
+            d[(source_id, target_id, label)] = \
+                Edge(source_id, target_id, label, properties=data)
+        return d.values()
+
+    @staticmethod
+    def _vertex_result_to_list(vertex_result):
+        d = dict()
+        for v_id, data in vertex_result:
+            d[v_id] = Vertex(vertex_id=v_id, properties=data)
+        return d.values()
+
+    @staticmethod
+    def _list_union(list_1, list_2):
+        """Union of list that aren't hashable
+
+        Can't use here set union because the items in the lists are
+        dictionaries and they are not hashable for set.
+
+        :return: list - union list
+        """
+
+        for target_item in list_2:
+            if target_item not in list_1:
+                list_1.append(target_item)
+
+        return list_1

vitrage/graph/algo_driver/sub_graph_matching.py

@@ -11,7 +11,9 @@
 # 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 as logging
+import six
 
 from vitrage.common.exception import VitrageAlgorithmError
 from vitrage.graph.filter import check_filter
@@ -22,6 +24,8 @@ LOG = logging.getLogger(__name__)
 MAPPED_V_ID = 'mapped_v_id'
 NEIGHBORS_MAPPED = 'neighbors_mapped'
 GRAPH_VERTEX = 'graph_vertex'
+NEG_VERTEX = 'negative vertex'
+NEG_CONDITION = 'negative_condition'
 
 
 def subgraph_matching(base_graph, subgraph, matches, validate=False):
@@ -94,7 +98,10 @@ def subgraph_matching(base_graph, subgraph, matches, validate=False):
             continue
 
         # STEP 3: FIND A SUB-GRAPH VERTEX TO MAP
-        v_with_unmapped_neighbors = vertices_with_unmapped_neighbors.pop(0)
+        v_with_unmapped_neighbors = _choose_vertex(
+            vertices_with_unmapped_neighbors,
+            curr_subgraph)
+
         unmapped_neighbors = list(filter(
             lambda v: not v.get(MAPPED_V_ID),
             curr_subgraph.neighbors(v_with_unmapped_neighbors.vertex_id)))
@@ -104,7 +111,10 @@ def subgraph_matching(base_graph, subgraph, matches, validate=False):
             curr_subgraph.update_vertex(v_with_unmapped_neighbors)
             queue.append(curr_subgraph)
             continue
-        subgraph_vertex_to_map = unmapped_neighbors.pop(0)
+        subgraph_vertex_to_map = _choose_vertex(
+            unmapped_neighbors,
+            curr_subgraph,
+            curr_v=v_with_unmapped_neighbors)
 
         # STEP 4: PROPERTIES CHECK
         graph_candidate_vertices = base_graph.neighbors(
@@ -114,25 +124,66 @@ def subgraph_matching(base_graph, subgraph, matches, validate=False):
         # STEP 5: STRUCTURE CHECK
         edges = _get_edges_to_mapped_vertices(curr_subgraph,
                                               subgraph_vertex_to_map.vertex_id)
+        neg_edges = set(e for e in edges if e.get(NEG_CONDITION))
+        pos_edges = edges.difference(neg_edges)
+
+        if not graph_candidate_vertices and neg_edges and not pos_edges:
+            subgraph_vertex_to_map[MAPPED_V_ID] = NEG_VERTEX
+            curr_subgraph.update_vertex(subgraph_vertex_to_map)
+            queue.append(curr_subgraph.copy())
+            continue
+
+        found_subgraphs = []
         for graph_vertex in graph_candidate_vertices:
             subgraph_vertex_to_map[MAPPED_V_ID] = graph_vertex.vertex_id
             subgraph_vertex_to_map[GRAPH_VERTEX] = graph_vertex
             curr_subgraph.update_vertex(subgraph_vertex_to_map)
-            if _graph_contains_subgraph_edges(base_graph,
+            if not _graph_contains_subgraph_edges(base_graph,
                                                   curr_subgraph,
-                                              edges):
+                                                  pos_edges):
-                queue.append(curr_subgraph.copy())
+                continue
+            if not _graph_contains_subgraph_edges(base_graph,
+                                                  curr_subgraph,
+                                                  neg_edges):
+                del found_subgraphs[:]
+                break
+            if neg_edges and not pos_edges:
+                subgraph_vertex_to_map[MAPPED_V_ID] = NEG_VERTEX
+                curr_subgraph.update_vertex(subgraph_vertex_to_map)
+            found_subgraphs.append(curr_subgraph.copy())
+
+        queue.extend(found_subgraphs)
 
     # Last thing: Convert results to the expected format!
+    return _generate_result(final_subgraphs)
+
+
+def _generate_result(final_subgraphs):
     result = []
     for mapping in final_subgraphs:
-        # TODO(ihefetz) If needed, Here we can easily extract the edge
+        subgraph_vertices = dict()
-        # matches from the mapping graph
+        for v in mapping.get_vertices():
-        a = {v.vertex_id: v[GRAPH_VERTEX] for v in mapping.get_vertices()}
+            v_id = v[MAPPED_V_ID]
-        result.append(a)
+            if isinstance(v_id, six.string_types) and v_id is not NEG_VERTEX:
+                subgraph_vertices[v.vertex_id] = v[GRAPH_VERTEX]
+
+        if subgraph_vertices not in result:
+            result.append(subgraph_vertices)
     return result
 
 
+def _choose_vertex(vertices, subgraph, curr_v=None):
+    """Return a vertex with a positive edge if exists, otherwise the first one.
+
+    """
+    for v in vertices:
+        curr_vertex_id = curr_v.vertex_id if curr_v else None
+        if not subgraph.get_edges(v.vertex_id, curr_vertex_id,
+                                  attr_filter={NEG_CONDITION: True}):
+            return v
+    return vertices.pop(0)
+
+
 def _get_edges_to_mapped_vertices(graph, vertex_id):
     """Get all edges (to/from) vertex where neighbor has a MAPPED_V_ID
 
@@ -169,7 +220,12 @@ def _graph_contains_subgraph_edges(graph, subgraph, subgraph_edges):
         found_graph_edge = graph.get_edge(graph_v_id_source,
                                           graph_v_id_target,
                                           e.label)
-        if not found_graph_edge or not check_filter(found_graph_edge, e):
+
+        if not found_graph_edge and e.get(NEG_CONDITION):
+            continue
+
+        if not found_graph_edge or not check_filter(found_graph_edge, e,
+                                                    NEG_CONDITION):
             return False
     return True
 

vitrage/graph/driver/elements.py

@@ -158,3 +158,6 @@ class Edge(PropertiesElement):
         :return: the other vertex id
         """
         return self.source_id if self.target_id == v_id else self.target_id
+
+    def has_vertex(self, v_id):
+        return self.source_id == v_id or self.target_id == v_id

vitrage/graph/driver/graph.py

@@ -202,11 +202,18 @@ class Graph(object):
         pass
 
     @abc.abstractmethod
-    def get_edges(self, v_id, direction=Direction.BOTH,
+    def get_edges(self,
+                  v1_id,
+                  v2_id=None,
+                  direction=Direction.BOTH,
                   attr_filter=None):
         """Fetch multiple edges from the graph,
 
-        Fetch an edge from the graph, according to its two vertices and label
+        Fetch all edges from the graph, according to its two vertices.
+        If only one vertex id is given it finds all the edges from this vertex
+        to all other vertices.
+        If two vertices ids are given it finds all the edges between those two
+        vertices.
 
         EXAMPLE
         -------
@@ -218,8 +225,11 @@ class Graph(object):
             v_id=v2.vertex_id,
             attr_filter={'LABEL': ['ON', 'WITH']})
 
-        :param v_id: vertex id a vertex
+        :param v1_id: first vertex id of vertex
-        :type v_id: str
+        :type v1_id: str
+
+        :param v2_id: second vertex id of vertex
+        :type v2_id: str
 
         :param direction: specify In/Out/Both for edge direction
         :type direction: int

vitrage/graph/driver/networkx_graph.py

@@ -118,7 +118,10 @@ class NXGraph(Graph):
             return edge_copy(source_id, target_id, label, properties)
         return None
 
-    def get_edges(self, v_id, direction=Direction.BOTH,
+    def get_edges(self,
+                  v1_id,
+                  v2_id=None,
+                  direction=Direction.BOTH,
                   attr_filter=None):
         """Fetch multiple edges from the graph
 
@@ -128,9 +131,14 @@ class NXGraph(Graph):
             return check_filter(edge_data, attr_filter)
 
         nodes, edges = self._neighboring_nodes_edges_query(
-            v_id, edge_predicate=check_edge, direction=direction)
+            v1_id, edge_predicate=check_edge, direction=direction)
+
         edge_copies = set(edge_copy(u, v, label, data)
                           for u, v, label, data in edges)
+
+        if v2_id:
+            edge_copies = [e for e in edge_copies if e.has_vertex(v2_id)]
+
         return edge_copies
 
     def _get_edges_by_direction(self, v_id, direction):

vitrage/tests/functional/evaluator/test_scenario_evaluator.py

@@ -12,22 +12,32 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from six.moves import queue
+
 from oslo_config import cfg
 
-from six.moves import queue
 from vitrage.common.constants import DatasourceAction
 from vitrage.common.constants import DatasourceProperties as DSProps
 from vitrage.common.constants import EdgeProperties as EProps
+from vitrage.common.constants import EntityCategory
 from vitrage.common.constants import VertexProperties as VProps
+from vitrage.datasources.nagios.properties import NagiosProperties
+from vitrage.datasources.nagios.properties import NagiosTestStatus
+from vitrage.datasources.neutron.network import NEUTRON_NETWORK_DATASOURCE
+from vitrage.datasources.neutron.port import NEUTRON_PORT_DATASOURCE
 from vitrage.datasources.nova.host import NOVA_HOST_DATASOURCE
+from vitrage.datasources.nova.instance import NOVA_INSTANCE_DATASOURCE
+from vitrage.datasources.nova.zone import NOVA_ZONE_DATASOURCE
 from vitrage.evaluator.scenario_evaluator import ScenarioEvaluator
 from vitrage.evaluator.scenario_repository import ScenarioRepository
+from vitrage.graph import create_edge
 from vitrage.tests.functional.base import \
     TestFunctionalBase
 import vitrage.tests.mocks.mock_driver as mock_driver
 from vitrage.tests.mocks import utils
 
 _TARGET_HOST = 'host-2'
+_TARGET_ZONE = 'zone-1'
 _NAGIOS_TEST_INFO = {'resource_name': _TARGET_HOST,
                      DSProps.DATASOURCE_ACTION: DatasourceAction.SNAPSHOT}
 
@@ -58,7 +68,8 @@ class TestScenarioEvaluator(TestFunctionalBase):
 
         event_queue, processor, evaluator = self._init_system()
 
-        host_v = self._get_host_from_graph(_TARGET_HOST,
+        host_v = self._get_entity_from_graph(NOVA_HOST_DATASOURCE,
+                                             _TARGET_HOST,
                                              processor.entity_graph)
         self.assertEqual('AVAILABLE', host_v[VProps.AGGREGATED_STATE],
                          'host should be AVAILABLE when starting')
@@ -85,7 +96,8 @@ class TestScenarioEvaluator(TestFunctionalBase):
 
         event_queue, processor, evaluator = self._init_system()
 
-        host_v = self._get_host_from_graph(_TARGET_HOST,
+        host_v = self._get_entity_from_graph(NOVA_HOST_DATASOURCE,
+                                             _TARGET_HOST,
                                              processor.entity_graph)
         self.assertEqual('AVAILABLE', host_v[VProps.AGGREGATED_STATE],
                          'host should be AVAILABLE when starting')
@@ -130,7 +142,8 @@ class TestScenarioEvaluator(TestFunctionalBase):
 
         event_queue, processor, evaluator = self._init_system()
 
-        host_v = self._get_host_from_graph(_TARGET_HOST,
+        host_v = self._get_entity_from_graph(NOVA_HOST_DATASOURCE,
+                                             _TARGET_HOST,
                                              processor.entity_graph)
         self.assertEqual('AVAILABLE', host_v[VProps.AGGREGATED_STATE],
                          'host should be AVAILABLE when starting')
@@ -168,7 +181,8 @@ class TestScenarioEvaluator(TestFunctionalBase):
 
         event_queue, processor, evaluator = self._init_system()
 
-        host_v = self._get_host_from_graph(_TARGET_HOST,
+        host_v = self._get_entity_from_graph(NOVA_HOST_DATASOURCE,
+                                             _TARGET_HOST,
                                              processor.entity_graph)
         self.assertEqual('AVAILABLE', host_v[VProps.AGGREGATED_STATE],
                          'host should be AVAILABLE when starting')
@@ -197,7 +211,6 @@ class TestScenarioEvaluator(TestFunctionalBase):
             self._get_deduced_alarms_on_host(host_v, processor.entity_graph)
         self.assertEqual(0, len(alarms))
 
-    # todo: (erosensw) uncomment this test
     def test_overlapping_deduced_alarm_1(self):
 
         event_queue, processor, evaluator = self._init_system()
@@ -293,12 +306,333 @@ class TestScenarioEvaluator(TestFunctionalBase):
         self.assertEqual(1, len(alarms))
         self.assertEqual('WARNING', alarms[0]['severity'])
 
+    def test_simple_not_operator_deduced_alarm(self):
+        """Handles a simple not operator use case
+
+        We have created the following template: if there is a neutron.port that
+        doesn't have a nagios alarm of type PORT_PROBLEM on it, then raise a
+        deduced alarm on the port called simple_port_deduced_alarm.
+        The test has 3 steps in it:
+        1. create neutron.network and neutron.port and check that the
+           simple_port_deduced_alarm is raised on the neutron.port because it
+           doesn't have a nagios alarm on it.
+        2. create a nagios alarm called PORT_PROBLEM on the port and check
+           that the alarm simple_port_deduced_alarm doesn't appear on the
+           neutron.port.
+        3. delete the nagios alarm called PORT_PROBLEM from the port, and
+           check that the alarm alarm simple_port_deduced_alarm appear on the
+           neutron.port.
+        """
+
+        event_queue, processor, evaluator = self._init_system()
+        entity_graph = processor.entity_graph
+
+        # constants
+        num_orig_vertices = entity_graph.num_vertices()
+        num_orig_edges = entity_graph.num_edges()
+        num_added_vertices = 2
+        num_added_edges = 2
+        num_deduced_vertices = 1
+        num_deduced_edges = 1
+        num_nagios_alarm_vertices = 1
+        num_nagios_alarm_edges = 1
+
+        # find instances
+        query = {
+            VProps.CATEGORY: 'RESOURCE',
+            VProps.TYPE: NOVA_INSTANCE_DATASOURCE
+        }
+        instance_ver = entity_graph.get_vertices(vertex_attr_filter=query)[0]
+
+        # update network
+        network_event = {
+            'tenant_id': 'admin',
+            'name': 'net-0',
+            'updated_at': '2015-12-01T12:46:41Z',
+            'status': 'active',
+            'id': '12345',
+            'vitrage_entity_type': 'neutron.network',
+            'vitrage_datasource_action': 'snapshot',
+            'vitrage_sample_date': '2015-12-01T12:46:41Z',
+        }
+
+        # update port
+        port_event = {
+            'tenant_id': 'admin',
+            'name': 'port-0',
+            'updated_at': '2015-12-01T12:46:41Z',
+            'status': 'active',
+            'id': '54321',
+            'vitrage_entity_type': 'neutron.port',
+            'vitrage_datasource_action': 'snapshot',
+            'vitrage_sample_date': '2015-12-01T12:46:41Z',
+            'network_id': '12345',
+            'device_id': instance_ver.get(VProps.ID),
+            'device_owner': 'compute:nova',
+            'fixed_ips': {}
+        }
+
+        processor.process_event(network_event)
+        processor.process_event(port_event)
+        port_vertex = entity_graph.get_vertices(
+            vertex_attr_filter={VProps.TYPE: NEUTRON_PORT_DATASOURCE})[0]
+        while not event_queue.empty():
+            processor.process_event(event_queue.get())
+
+        # test asserts
+        query = {VProps.CATEGORY: EntityCategory.ALARM}
+        port_neighbors = entity_graph.neighbors(port_vertex.vertex_id,
+                                                vertex_attr_filter=query)
+        self.assertEqual(num_orig_vertices + num_added_vertices +
+                         num_deduced_vertices, entity_graph.num_vertices())
+        self.assertEqual(num_orig_edges + num_added_edges + num_deduced_edges,
+                         entity_graph.num_edges())
+        self.assertEqual(1, len(port_neighbors))
+        self.assertEqual(port_neighbors[0][VProps.CATEGORY],
+                         EntityCategory.ALARM)
+        self.assertEqual(port_neighbors[0][VProps.TYPE], 'vitrage')
+        self.assertEqual(port_neighbors[0][VProps.NAME],
+                         'simple_port_deduced_alarm')
+
+        # Add PORT_PROBLEM alarm
+        test_vals = {'status': 'WARNING',
+                     'service': 'PORT_PROBLEM',
+                     'name': 'PORT_PROBLEM',
+                     DSProps.DATASOURCE_ACTION: DatasourceAction.SNAPSHOT,
+                     VProps.RESOURCE_ID: port_vertex.get(VProps.ID),
+                     'resource_name': port_vertex.get(VProps.ID),
+                     'resource_type': NEUTRON_PORT_DATASOURCE}
+        generator = mock_driver.simple_nagios_alarm_generators(1, 1, test_vals)
+        nagios_event = mock_driver.generate_random_events_list(generator)[0]
+
+        processor.process_event(nagios_event)
+        while not event_queue.empty():
+            processor.process_event(event_queue.get())
+
+        # test asserts
+        self.assertEqual(num_orig_vertices + num_added_vertices +
+                         num_deduced_vertices + num_nagios_alarm_vertices,
+                         entity_graph.num_vertices())
+        self.assertEqual(num_orig_edges + num_added_edges + num_deduced_edges +
+                         num_nagios_alarm_edges, entity_graph.num_edges())
+
+        query = {VProps.CATEGORY: EntityCategory.ALARM, VProps.TYPE: 'vitrage'}
+        port_neighbors = entity_graph.neighbors(port_vertex.vertex_id,
+                                                vertex_attr_filter=query)
+        self.assertEqual(1, len(port_neighbors))
+        self.assertEqual(port_neighbors[0][VProps.CATEGORY],
+                         EntityCategory.ALARM)
+        self.assertEqual(port_neighbors[0][VProps.TYPE], 'vitrage')
+        self.assertEqual(port_neighbors[0][VProps.NAME],
+                         'simple_port_deduced_alarm')
+        self.assertEqual(port_neighbors[0][VProps.IS_DELETED], True)
+
+        query = {VProps.CATEGORY: EntityCategory.ALARM, VProps.TYPE: 'nagios'}
+        port_neighbors = entity_graph.neighbors(port_vertex.vertex_id,
+                                                vertex_attr_filter=query)
+        self.assertEqual(port_neighbors[0][VProps.CATEGORY],
+                         EntityCategory.ALARM)
+        self.assertEqual(port_neighbors[0][VProps.TYPE], 'nagios')
+        self.assertEqual(port_neighbors[0][VProps.NAME], 'PORT_PROBLEM')
+        self.assertEqual(port_neighbors[0][VProps.IS_DELETED], False)
+        self.assertEqual(port_neighbors[0][VProps.IS_PLACEHOLDER], False)
+
+        # disable PORT_PROBLEM alarm
+        nagios_event[NagiosProperties.STATUS] = NagiosTestStatus.OK
+        processor.process_event(nagios_event)
+        while not event_queue.empty():
+            processor.process_event(event_queue.get())
+
+        # test asserts
+        self.assertEqual(num_orig_vertices + num_added_vertices +
+                         num_deduced_vertices + num_nagios_alarm_vertices,
+                         entity_graph.num_vertices())
+        self.assertEqual(num_orig_edges + num_added_edges + num_deduced_edges +
+                         num_nagios_alarm_edges, entity_graph.num_edges())
+
+        query = {VProps.CATEGORY: EntityCategory.ALARM, VProps.TYPE: 'vitrage'}
+        port_neighbors = entity_graph.neighbors(port_vertex.vertex_id,
+                                                vertex_attr_filter=query)
+        self.assertEqual(1, len(port_neighbors))
+        self.assertEqual(port_neighbors[0][VProps.CATEGORY],
+                         EntityCategory.ALARM)
+        self.assertEqual(port_neighbors[0][VProps.TYPE], 'vitrage')
+        self.assertEqual(port_neighbors[0][VProps.NAME],
+                         'simple_port_deduced_alarm')
+        self.assertEqual(port_neighbors[0][VProps.IS_DELETED], False)
+
+        query = {VProps.CATEGORY: EntityCategory.ALARM, VProps.TYPE: 'nagios'}
+        port_neighbors = entity_graph.neighbors(port_vertex.vertex_id,
+                                                vertex_attr_filter=query)
+        self.assertEqual(port_neighbors[0][VProps.CATEGORY],
+                         EntityCategory.ALARM)
+        self.assertEqual(port_neighbors[0][VProps.TYPE], 'nagios')
+        self.assertEqual(port_neighbors[0][VProps.NAME], 'PORT_PROBLEM')
+        self.assertEqual(port_neighbors[0][VProps.IS_DELETED], True)
+
+    def test_complex_not_operator_deduced_alarm(self):
+        """Handles a complex not operator use case
+
+        We have created the following template: if there is a openstack.cluster
+        that has a nova.zone which is connected to a neutron.network and also
+        there is no nagios alarm of type CLUSTER_PROBLEM on the cluster and no
+        nagios alarm of type NETWORK_PROBLEM on the neutron.network, then raise
+        a deduced alarm on the nova.zone called complex_zone_deduced_alarm.
+        The test has 3 steps in it:
+        1. create a neutron.network and connect it to a zone, and check that
+           the complex_zone_deduced_alarm is raised on the nova.zone because it
+           doesn't have nagios alarms the openstack.cluster and on the
+           neutron.network.
+        2. create a nagios alarm called NETWORK_PROBLEM on the network and
+           check that the alarm complex_zone_deduced_alarm doesn't appear on
+           the nova.zone.
+        3. delete the nagios alarm called NETWORK_PROBLEM from the port, and
+           check that the alarm alarm complex_zone_deduced_alarm appear on the
+           nova.zone.
+        """
+
+        event_queue, processor, evaluator = self._init_system()
+        entity_graph = processor.entity_graph
+
+        # constants
+        num_orig_vertices = entity_graph.num_vertices()
+        num_orig_edges = entity_graph.num_edges()
+        num_added_vertices = 2
+        num_added_edges = 3
+        num_deduced_vertices = 1
+        num_deduced_edges = 1
+        num_network_alarm_vertices = 1
+        num_network_alarm_edges = 1
+
+        # update zone
+        generator = mock_driver.simple_zone_generators(1, 1, snapshot_events=1)
+        zone_event = mock_driver.generate_random_events_list(generator)[0]
+        zone_event['zoneName'] = 'zone-7'
+
+        # update network
+        network_event = {
+            'tenant_id': 'admin',
+            'name': 'net-0',
+            'updated_at': '2015-12-01T12:46:41Z',
+            'status': 'active',
+            'id': '12345',
+            'vitrage_entity_type': 'neutron.network',
+            'vitrage_datasource_action': 'snapshot',
+            'vitrage_sample_date': '2015-12-01T12:46:41Z',
+        }
+
+        # process events
+        processor.process_event(zone_event)
+        query = {VProps.TYPE: NOVA_ZONE_DATASOURCE, VProps.ID: 'zone-7'}
+        zone_vertex = entity_graph.get_vertices(vertex_attr_filter=query)[0]
+        processor.process_event(network_event)
+        query = {VProps.TYPE: NEUTRON_NETWORK_DATASOURCE}
+        network_vertex = entity_graph.get_vertices(vertex_attr_filter=query)[0]
+
+        # add edge between network and zone
+        edge = create_edge(network_vertex.vertex_id, zone_vertex.vertex_id,
+                           'attached')
+        entity_graph.add_edge(edge)
+
+        while not event_queue.empty():
+            processor.process_event(event_queue.get())
+
+        # test asserts
+        query = {VProps.CATEGORY: EntityCategory.ALARM}
+        zone_neighbors = entity_graph.neighbors(zone_vertex.vertex_id,
+                                                vertex_attr_filter=query)
+        self.assertEqual(num_orig_vertices + num_added_vertices +
+                         num_deduced_vertices, entity_graph.num_vertices())
+        self.assertEqual(num_orig_edges + num_added_edges + num_deduced_edges,
+                         entity_graph.num_edges())
+        self.assertEqual(1, len(zone_neighbors))
+        self.assertEqual(zone_neighbors[0][VProps.CATEGORY],
+                         EntityCategory.ALARM)
+        self.assertEqual(zone_neighbors[0][VProps.TYPE], 'vitrage')
+        self.assertEqual(zone_neighbors[0][VProps.NAME],
+                         'complex_zone_deduced_alarm')
+
+        # Add NETWORK_PROBLEM alarm
+        test_vals = {'status': 'WARNING',
+                     'service': 'NETWORK_PROBLEM',
+                     'name': 'NETWORK_PROBLEM',
+                     DSProps.DATASOURCE_ACTION: DatasourceAction.SNAPSHOT,
+                     VProps.RESOURCE_ID: network_vertex[VProps.ID],
+                     'resource_name': network_vertex[VProps.ID],
+                     'resource_type': NEUTRON_NETWORK_DATASOURCE}
+        generator = mock_driver.simple_nagios_alarm_generators(1, 1, test_vals)
+        nagios_event = mock_driver.generate_random_events_list(generator)[0]
+
+        processor.process_event(nagios_event)
+        while not event_queue.empty():
+            processor.process_event(event_queue.get())
+
+        self.assertEqual(num_orig_vertices + num_added_vertices +
+                         num_deduced_vertices + num_network_alarm_vertices,
+                         entity_graph.num_vertices())
+        self.assertEqual(num_orig_edges + num_added_edges + num_deduced_edges +
+                         num_network_alarm_edges, entity_graph.num_edges())
+
+        query = {VProps.CATEGORY: EntityCategory.ALARM}
+        network_neighbors = entity_graph.neighbors(network_vertex.vertex_id,
+                                                   vertex_attr_filter=query)
+        self.assertEqual(1, len(network_neighbors))
+        self.assertEqual(network_neighbors[0][VProps.CATEGORY],
+                         EntityCategory.ALARM)
+        self.assertEqual(network_neighbors[0][VProps.TYPE], 'nagios')
+        self.assertEqual(network_neighbors[0][VProps.NAME], 'NETWORK_PROBLEM')
+        self.assertEqual(network_neighbors[0][VProps.IS_DELETED], False)
+        self.assertEqual(network_neighbors[0][VProps.IS_PLACEHOLDER], False)
+
+        zone_neighbors = entity_graph.neighbors(zone_vertex.vertex_id,
+                                                vertex_attr_filter=query)
+        self.assertEqual(1, len(zone_neighbors))
+        self.assertEqual(zone_neighbors[0][VProps.CATEGORY],
+                         EntityCategory.ALARM)
+        self.assertEqual(zone_neighbors[0][VProps.TYPE], 'vitrage')
+        self.assertEqual(zone_neighbors[0][VProps.NAME],
+                         'complex_zone_deduced_alarm')
+        self.assertEqual(zone_neighbors[0][VProps.IS_DELETED], True)
+
+        # delete NETWORK_PROBLEM alarm
+        nagios_event[NagiosProperties.STATUS] = NagiosTestStatus.OK
+        processor.process_event(nagios_event)
+        while not event_queue.empty():
+            processor.process_event(event_queue.get())
+
+        self.assertEqual(num_orig_vertices + num_added_vertices +
+                         num_deduced_vertices + num_network_alarm_vertices,
+                         entity_graph.num_vertices())
+        self.assertEqual(num_orig_edges + num_added_edges + num_deduced_edges +
+                         num_network_alarm_edges, entity_graph.num_edges())
+
+        query = {VProps.CATEGORY: EntityCategory.ALARM}
+        network_neighbors = entity_graph.neighbors(network_vertex.vertex_id,
+                                                   vertex_attr_filter=query)
+        self.assertEqual(1, len(network_neighbors))
+        self.assertEqual(network_neighbors[0][VProps.CATEGORY],
+                         EntityCategory.ALARM)
+        self.assertEqual(network_neighbors[0][VProps.TYPE], 'nagios')
+        self.assertEqual(network_neighbors[0][VProps.NAME], 'NETWORK_PROBLEM')
+        self.assertEqual(network_neighbors[0][VProps.IS_DELETED], True)
+
+        zone_neighbors = entity_graph.neighbors(zone_vertex.vertex_id,
+                                                vertex_attr_filter=query)
+        self.assertEqual(1, len(zone_neighbors))
+        self.assertEqual(zone_neighbors[0][VProps.CATEGORY],
+                         EntityCategory.ALARM)
+        self.assertEqual(zone_neighbors[0][VProps.TYPE], 'vitrage')
+        self.assertEqual(zone_neighbors[0][VProps.NAME],
+                         'complex_zone_deduced_alarm')
+        self.assertEqual(zone_neighbors[0][VProps.IS_DELETED], False)
+
     def get_host_after_event(self, event_queue, nagios_event,
                              processor, target_host):
         processor.process_event(nagios_event)
         while not event_queue.empty():
             processor.process_event(event_queue.get())
-        host_v = self._get_host_from_graph(target_host,
+        host_v = self._get_entity_from_graph(NOVA_HOST_DATASOURCE,
+                                             target_host,
                                              processor.entity_graph)
         return host_v
 
@@ -311,13 +645,12 @@ class TestScenarioEvaluator(TestFunctionalBase):
         return event_queue, processor, evaluator
 
     @staticmethod
-    def _get_host_from_graph(host_name, entity_graph):
+    def _get_entity_from_graph(entity_type, entity_name, entity_graph):
-        vertex_attrs = {VProps.TYPE: NOVA_HOST_DATASOURCE,
+        vertex_attrs = {VProps.TYPE: entity_type,
-                        VProps.NAME: host_name}
+                        VProps.NAME: entity_name}
-        host_vertices = entity_graph.get_vertices(
+        vertices = entity_graph.get_vertices(vertex_attr_filter=vertex_attrs)
-            vertex_attr_filter=vertex_attrs)
+        # assert len(vertices) == 1, "incorrect number of vertices"
-        assert len(host_vertices) == 1, "incorrect number of vertices"
+        return vertices[0]
-        return host_vertices[0]
 
     @staticmethod
     def _get_deduced_alarms_on_host(host_v, entity_graph):

vitrage/tests/mocks/trace_generator.py

@@ -27,7 +27,6 @@ from random import randint
 
 # noinspection PyPep8Naming
 from vitrage.common.constants import EdgeLabel
-from vitrage.common.constants import TopologyFields
 from vitrage.datasources.nova.host import NOVA_HOST_DATASOURCE
 from vitrage.datasources.static import StaticFields
 from vitrage.tests.mocks.entity_model import BasicEntityModel as Bem
@@ -569,12 +568,12 @@ def _get_static_snapshot_driver_values(spec):
         switch_id = "s{}".format(switch_index)
 
         relationship = {
-            TopologyFields.SOURCE: switch_id,
+            StaticFields.SOURCE: switch_id,
-            TopologyFields.TARGET: host_id,
+            StaticFields.TARGET: host_id,
-            TopologyFields.RELATIONSHIP_TYPE: EdgeLabel.ATTACHED
+            StaticFields.RELATIONSHIP_TYPE: EdgeLabel.ATTACHED
         }
         rel = relationship.copy()
-        rel[TopologyFields.TARGET] = entities[host_id]
+        rel[StaticFields.TARGET] = entities[host_id]
         relationships[switch_id].append(rel)
 
     for host_index, switch_index in host_switch_mapping:

vitrage/tests/resources/templates/evaluator/complex_not_operator_deduced_alarm.yaml

@@ -0,0 +1,59 @@
+metadata:
+ name: complex_correct_not_condition_template
+ description: complex not condition template for general tests
+definitions:
+ entities:
+  - entity:
+     category: ALARM
+     type: nagios
+     name: NETWORK_PROBLEM
+     template_id: network_alarm
+  - entity:
+     category: ALARM
+     type: nagios
+     name: CLUSTER_PROBLEM
+     template_id: cluster_alarm
+  - entity:
+     category: RESOURCE
+     type: nova.zone
+     template_id: nova_zone
+  - entity:
+     category: RESOURCE
+     type: openstack.cluster
+     template_id: openstack_cluster
+  - entity:
+     category: RESOURCE
+     type: neutron.network
+     template_id: neutron_network
+ relationships:
+  - relationship:
+     source: cluster_alarm
+     target: openstack_cluster
+     relationship_type: on
+     template_id : alarm_on_cluster
+  - relationship:
+     source: openstack_cluster
+     target: nova_zone
+     relationship_type: contains
+     template_id : cluster_contains_zone
+  - relationship:
+     source: neutron_network
+     target: nova_zone
+     relationship_type: attached
+     template_id : network_attached_zone
+  - relationship:
+     source: network_alarm
+     target: neutron_network
+     relationship_type: on
+     template_id : alarm_on_network
+scenarios:
+ - scenario:
+    condition: cluster_contains_zone and network_attached_zone and not alarm_on_cluster and not alarm_on_network
+    actions:
+     - action:
+        action_type: raise_alarm
+        properties:
+         alarm_name: complex_zone_deduced_alarm
+         severity: WARNING
+        action_target:
+         target: nova_zone

vitrage/tests/resources/templates/evaluator/simple_not_operator_deduced_alarm.yaml

@@ -0,0 +1,31 @@
+metadata:
+ name: basic_correct_not_condition_template
+ description: basic not condition template for general tests
+definitions:
+ entities:
+  - entity:
+     category: ALARM
+     type: nagios
+     name: PORT_PROBLEM
+     template_id: port_alarm
+  - entity:
+     category: RESOURCE
+     type: neutron.port
+     template_id: port
+ relationships:
+  - relationship:
+     source: port_alarm
+     target: port
+     relationship_type: on
+     template_id : alarm_on_port
+scenarios:
+ - scenario:
+    condition: not alarm_on_port
+    actions:
+     - action:
+        action_type: raise_alarm
+        properties:
+         alarm_name: simple_port_deduced_alarm
+         severity: WARNING
+        action_target:
+         target: port

vitrage/tests/unit/datasources/static/test_static_driver.py

@@ -17,7 +17,6 @@ from oslo_config import cfg
 from vitrage.common.constants import DatasourceAction
 from vitrage.common.constants import DatasourceOpts as DSOpts
 from vitrage.common.constants import GraphAction
-from vitrage.common.constants import TopologyFields
 from vitrage.datasources.static import driver
 from vitrage.datasources.static import STATIC_DATASOURCE
 from vitrage.datasources.static import StaticFields
@@ -99,8 +98,9 @@ class TestStaticDriver(base.BaseTest):
             self._validate_static_entity(entity)
 
     def _validate_static_entity(self, entity):
-        self.assertTrue(isinstance(entity[TopologyFields.METADATA], dict))
+        self.assertTrue(isinstance(entity[StaticFields.METADATA],
-        for rel in entity[TopologyFields.RELATIONSHIPS]:
+                                   dict))
+        for rel in entity[StaticFields.RELATIONSHIPS]:
             self._validate_static_rel(entity, rel)
 
     def _validate_static_rel(self, entity, rel):

vitrage/tests/unit/datasources/static/test_static_transformer.py

@@ -19,12 +19,12 @@ from oslo_config import cfg
 from vitrage.common.constants import DatasourceOpts as DSOpts
 from vitrage.common.constants import DatasourceProperties as DSProps
 from vitrage.common.constants import EntityCategory
-from vitrage.common.constants import TopologyFields
 from vitrage.common.constants import UpdateMethod
 from vitrage.common.constants import VertexProperties as VProps
 from vitrage.datasources.nova.host import NOVA_HOST_DATASOURCE
 from vitrage.datasources.nova.host.transformer import HostTransformer
 from vitrage.datasources.static import STATIC_DATASOURCE
+from vitrage.datasources.static import StaticFields
 from vitrage.datasources.static.transformer import StaticTransformer
 from vitrage.tests import base
 from vitrage.tests.mocks import mock_driver
@@ -109,7 +109,7 @@ class TestStaticTransformer(base.BaseTest):
         self.assertEqual(vertex[VProps.SAMPLE_TIMESTAMP],
                          event[DSProps.SAMPLE_DATE])
 
-        for k, v in event.get(TopologyFields.METADATA, {}):
+        for k, v in event.get(StaticFields.METADATA, {}):
             self.assertEqual(vertex[k], v)
 
     def _validate_common_props(self, vertex, event):
@@ -120,19 +120,22 @@ class TestStaticTransformer(base.BaseTest):
 
     def _validate_neighbors(self, neighbors, vertex_id, event):
         for i in range(len(neighbors)):
-            self._validate_neighbor(neighbors[i],
+            self._validate_neighbor(
-                                    event[TopologyFields.RELATIONSHIPS][i],
+                neighbors[i],
+                event[StaticFields.RELATIONSHIPS][i],
                 vertex_id)
 
     def _validate_neighbor(self, neighbor, rel, vertex_id):
         vertex = neighbor.vertex
-        self._validate_neighbor_vertex_props(vertex,
+        self._validate_neighbor_vertex_props(
-                                             rel[TopologyFields.TARGET])
+            vertex,
+            rel[StaticFields.TARGET])
 
         edge = neighbor.edge
         self.assertEqual(edge.source_id, vertex_id)
         self.assertEqual(edge.target_id, neighbor.vertex.vertex_id)
-        self.assertEqual(edge.label, rel[TopologyFields.RELATIONSHIP_TYPE])
+        self.assertEqual(edge.label,
+                         rel[StaticFields.RELATIONSHIP_TYPE])
 
     def _validate_neighbor_vertex_props(self, vertex, event):
         self._validate_common_props(vertex, event)

vitrage/tests/unit/entity_graph/base.py

@@ -18,6 +18,8 @@ from vitrage.common.constants import DatasourceAction
 from vitrage.common.constants import DatasourceProperties as DSProps
 from vitrage.common.constants import EntityCategory
 from vitrage.datasources.nagios import NAGIOS_DATASOURCE
+from vitrage.datasources.neutron.network import NEUTRON_NETWORK_DATASOURCE
+from vitrage.datasources.neutron.port import NEUTRON_PORT_DATASOURCE
 from vitrage.datasources.nova.host import NOVA_HOST_DATASOURCE
 from vitrage.datasources.nova.instance import NOVA_INSTANCE_DATASOURCE
 from vitrage.datasources.nova.zone import NOVA_ZONE_DATASOURCE
@@ -42,7 +44,9 @@ class TestEntityGraphUnitBase(base.BaseTest):
                     default=[NAGIOS_DATASOURCE,
                              NOVA_HOST_DATASOURCE,
                              NOVA_INSTANCE_DATASOURCE,
-                             NOVA_ZONE_DATASOURCE],
+                             NOVA_ZONE_DATASOURCE,
+                             NEUTRON_NETWORK_DATASOURCE,
+                             NEUTRON_PORT_DATASOURCE],
                     help='Names of supported data sources'),
 
         cfg.ListOpt('path',

vitrage/tests/unit/graph/base.py

@@ -38,10 +38,11 @@ from vitrage.tests import base
 
 LOG = logging.getLogger(__name__)
 
+# number of vms and alarms on vms needs 7 or more
 ENTITY_GRAPH_HOSTS_PER_CLUSTER = 8
 ENTITY_GRAPH_VMS_PER_HOST = 8
 ENTITY_GRAPH_ALARMS_PER_HOST = 8
-ENTITY_GRAPH_TESTS_PER_HOST = 20
+ENTITY_GRAPH_TESTS_PER_HOST = 8
 ENTITY_GRAPH_ALARMS_PER_VM = 8
 
 RESOURCE = EntityCategory.RESOURCE