nova instance transformer and tests

Change-Id: Id3eb11592c36ac196680f6b6d21bf40f1a67aebf

requirements.txt

@@ -6,9 +6,10 @@ pbr>=1.6
 Babel>=1.3
 networkx>=1.10
 oslo.log>=1.12.0 # Apache-2.0
+oslo.policy>=0.3.0
 pecan>=0.8.0
 PasteDeploy>=1.5.0
 Werkzeug>=0.7
-oslo.policy>=0.3.0
 keystonemiddleware>=2.3.0
+stevedore>=1.5.0 # Apache-2.0
 exrex>=0.9.4

setup.cfg

@@ -39,3 +39,8 @@ all_files = 1
 
 [upload_sphinx]
 upload-dir = doc/build/html
+
+[entry_points]
+vitrage.transformers =
+    nova.instance = vitrage.entity_graph.transformer.nova_transformer.InstanceTransformer
+    nova.host = vitrage.entity_graph.transformer.nova_transformer.HostTransformer

test-requirements.txt

@@ -15,3 +15,5 @@ testrepository>=0.0.18
 testscenarios>=0.4
 testtools>=1.4.0
 exrex>=0.9.4
+stevedore>=1.5.0 # Apache-2.0
+

vitrage/common/__init__.py

@@ -0,0 +1 @@
+__author__ = 'stack'

vitrage/common/constants.py

@@ -0,0 +1,41 @@
+# Copyright 2015 - Alcatel-Lucent
+#
+# 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 VertexConstants(object):
+    TYPE = 'TYPE'
+    SUB_TYPE = 'SUB_TYPE'
+    ID = 'ID'
+    IS_VERTEX_DELETED = 'IS_VERTEX_DELETED'
+    VERTEX_DELETION_TIMESTAMP = 'VERTEX_DELETION_TIMESTAMP'
+    STATE = 'STATE'
+    PROJECT = 'PROJECT'
+    UPDATE_TIMESTAMP = 'UPDATE_TIMESTAMP'
+
+
+class EdgeConstants(object):
+    RELATION_NAME = 'RELATION_NAME'
+    IS_EDGE_DELETED = 'IS_EDGE_DELETED'
+    EDGE_DELETION_TIMESTAMP = 'EDGE_DELETION_TIMESTAMP'
+
+
+class EdgeLabels(object):
+    ON = 'on'
+    CONTAINS = 'contains'
+
+
+class SynchronizerMessageMode(object):
+    SNAPSHOT = 'snapshot'
+    INIT_SNAPSHOT = 'init_snapshot'
+    UPDATE = 'update'

vitrage/entity_graph/properties.py

@@ -1,30 +0,0 @@
-# Copyright 2015 - Alcatel-Lucent
-#
-# 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.
-
-# Vertex properties
-TYPE = 'TYPE'
-SUB_TYPE = 'SUB_TYPE'
-ID = 'ID'
-VERTEX_ID = 'VERTEX_ID'
-EVENT_TYPE = 'EVENT_TYPE'
-IS_VERTEX_DELETED = 'IS_VERTEX_DELETED'
-VERTEX_DELETION_TIMESTAMP = 'VERTEX_DELETION_TIMESTAMP'
-STATE = 'STATE'
-PROJECT = 'PROJECT'
-TIMESTAMP = 'TIMESTAMP'
-
-# Edge properties
-RELATION_NAME = 'RELATION_NAME'
-IS_EDGE_DELETED = 'IS_EDGE_DELETED'
-EDGE_DELETION_TIMESTAMP = 'EDGE_DELETION_TIMESTAMP'

vitrage/entity_graph/transformer/base.py

@@ -13,12 +13,19 @@
 # under the License.
 
 import abc
+import six
 
+from collections import namedtuple
 from oslo_log import log as logging
 
 LOG = logging.getLogger(__name__)
 
 
+EntityWrapper = \
+    namedtuple('EntityWrapper', ['entity_vertex', 'neighbors'], 'action')
+
+
+@six.add_metaclass(abc.ABCMeta)
 class Transformer(object):
 
     @abc.abstractmethod
@@ -28,13 +35,14 @@ class Transformer(object):
         :return: An EntityWrapper. EntityWrapper is namedTuple that contains
         an entity vertex and a list of vertex and an edge pair that describe
         the entity's neighbors.
+        :rtype: EntityWrapper
         """
         pass
 
     @abc.abstractmethod
-    def get_key_fields(self):
+    def key_fields(self):
         pass
 
     @abc.abstractmethod
-    def get_key(self, entity_event):
+    def extract_key(self, entity_event):
         pass

vitrage/entity_graph/transformer/nova_transformer.py

@@ -0,0 +1,47 @@
+# Copyright 2015 - Alcatel-Lucent
+#
+# 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 as logging
+from vitrage.common.constants import VertexConstants as vertex_cons
+from vitrage.entity_graph.transformer import base
+
+LOG = logging.getLogger(__name__)
+
+KEY_SEPARATOR = ':'
+
+ENTITY_TYPE = 'RESOURCE'
+INSTANCE_SUB_TYPE = 'nova.instance'
+HOST_SUB_TYPE = 'nova.host'
+
+
+class InstanceTransformer(base.Transformer):
+
+    # # Fields returned from Nova Instance snapshot
+    ENTITY_ID_DICT = {'snapshot': 'id',
+                      'init_snapshot': 'id',
+                      'update': 'instance_id'}
+
+    def transform(self, entity_event):
+        pass
+
+    def key_fields(self):
+        return [vertex_cons.TYPE, vertex_cons.SUB_TYPE, vertex_cons.ID]
+
+    def extract_key(self, entity_event):
+
+        sync_mode = entity_event['sync_mode']
+        return KEY_SEPARATOR.join(
+            [ENTITY_TYPE,
+             INSTANCE_SUB_TYPE,
+             entity_event[self.ENTITY_ID_DICT[sync_mode]]])

vitrage/entity_graph/transformer/transformer_manager.py

@@ -0,0 +1,29 @@
+# Copyright 2014 - Mirantis, Inc.
+# Copyright 2014 - StackStorm, Inc.
+#
+#    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 as logging
+
+
+LOG = logging.getLogger(__name__)
+
+
+class TransformerManager(object):
+
+    def __init__(self):
+        self.transformers = self.register_transformer_classes()
+
+    @staticmethod
+    def register_transformer_classes():
+        pass

vitrage/graph/driver.py

@@ -67,7 +67,7 @@ class Edge(object):
         :param source_id: source vertex id
         :type source_id: str
 
-        :param target_id: target vertex id
+        :param target_id: target vertex id`
         :type target_id: str
 
         :param label:

vitrage/tests/mocks/mock_generators.py

@@ -25,14 +25,14 @@ multiple instances of the same entity type.
 
 from os.path import curdir
 from os import walk
-from random import randint
+import random
 
 from entity_model import CommonEntityModel as cem
 
 
 def _get_filename_path(filename):
     base_dir = None
-    for i in walk("../%s" % curdir):
+    for i in walk("../../%s" % curdir):
         if i[0].find('resources') != -1 and filename in i[2]:
             base_dir = i[0]
             break
@@ -46,8 +46,6 @@ class MockEventGenerator(object):
     """Represents a single generator.
 
     A generator can generate events for several instances of the same type
-
-    file is expected to be in the ../resources folder
     """
 
     def __init__(self, filename, instance_num, generator_name='generator'):
@@ -75,7 +73,7 @@ class MockEventGenerator(object):
                 param_type = line_params[1].lower()
                 params_dict[param_type][line_params[0]] = line_params[2]
         except KeyError as ke:
-            print("Syntax error: {0}".format(ke.message))
+            print("Syntax error ({0}): {1}".format(ke.errno, ke.strerror))
 
     def prepare_instance_models(self):
         """Create the models for all the instances """
@@ -97,7 +95,7 @@ class MockEventGenerator(object):
 
         data_stream = []
         for _ in xrange(event_num):
-            model = self.models[randint(0, self.instance_num - 1)]
+            model = self.models[random.randint(0, self.instance_num - 1)]
             model.generate_dynamic_params()
             data_stream.append(model.params)
         return data_stream

vitrage/tests/mocks/mock_syncronizer.py

@@ -20,7 +20,7 @@ of what can be returned
 
 usage example:
     test_entity_spec_list = [
-        {'filename': '../resources/mock_nova_instance_config_1.txt',
+        {'filename': '../resources/mock_nova_inst_snapshot.txt',
          '#instances': 10,
          'name': 'Instance (vm) generator'
          }

vitrage/tests/resources/mock_nova_inst_snapshot.txt

@@ -1,4 +1,4 @@
-event_type                           S  snapshot
+sync_mode                            D  snapshot|init_snapshot
 OS-DCF:diskConfig                    S  AUTO
 OS-EXT-AZ:availability_zone          S  nova
 OS-EXT-SRV-ATTR:host                 D  [a-z]{4}-devstack

vitrage/tests/resources/mock_nova_inst_update.txt

@@ -1,4 +1,4 @@
-event_type                             S  update
+sync_mode                              S  update
 u-OS-DCF:diskConfig                    S  AUTO
 u-OS-EXT-AZ:availability_zone          S  nova
 u-OS-EXT-SRV-ATTR:host                 D  [a-z]{4}-devstack
@@ -22,7 +22,7 @@ u-config_drive                         D  True|False
 u-created                              D  \d{2}:\d{2}:\d{2} \d{2}:\d{2}:\d{2}
 u-flavor                               D  m1.nano
 u-hostId                               D  [0-9a-f]{56}
-u-id                                   S  [0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}
+instance_id                            S  [0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}
 u-image                                D  cirros-[a-z]+ ([a-z0-9]+)
 u-key_name                             D  -
 u-metadata                             D  \{\}

vitrage/tests/unit/base.py

@@ -13,8 +13,16 @@
 # under the License.
 
 from oslotest import base
+import sys
 
 
 class BaseTest(base.BaseTestCase):
 
     """Test case base class for all unit tests."""
+
+    def assert_list_equal(self, l1, l2):
+        if tuple(sys.version_info)[0:2] < (2, 7):
+            # for python 2.6 compatibility
+            self.assertEqual(l1, l2)
+        else:
+            super(BaseTest, self).assertListEqual(l1, l2)

vitrage/tests/unit/transformers/test_nova_instance_transformer.py

@@ -1,26 +0,0 @@
-# Copyright 2015 - Alcatel-Lucent
-#
-# 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 as logging
-from vitrage.tests.unit import base
-
-LOG = logging.getLogger(__name__)
-
-
-class TransformNovaInstanceTest(base.BaseTest):
-
-    def test_transform_instance(self):
-
-        LOG.debug('Test transform Nova instance into entity wrapper')
-        self.assertTrue(True)

vitrage/tests/unit/transformers/test_nova_transformers.py

@@ -0,0 +1,83 @@
+# Copyright 2015 - Alcatel-Lucent
+#
+# 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 as logging
+
+from vitrage.common.constants import VertexConstants as vertexCons
+from vitrage.entity_graph.transformer import nova_transformer as nt
+from vitrage.tests.mocks import mock_syncronizer as mock_sync
+from vitrage.tests.unit import base
+
+LOG = logging.getLogger(__name__)
+
+
+def get_nova_instance_transformer():
+    return nt.InstanceTransformer()
+
+
+def get_instance_entity_spec_list(config_file_path, number_of_instances):
+
+    """Returns a list of nova instance specifications by
+
+    given specific configuration file.
+
+    :rtype : list
+    """
+    return {
+        'filename': config_file_path,
+        '#instances': number_of_instances,
+        'name': 'Instance generator'
+    }
+
+
+class NovaInstanceTransformerTest(base.BaseTest):
+
+    def test_key_fields(self):
+        LOG.debug('Test get key fields from nova instance transformer')
+        transformer = get_nova_instance_transformer()
+
+        expected_key_fields = [vertexCons.TYPE,
+                               vertexCons.SUB_TYPE,
+                               vertexCons.ID]
+        observed_key_fields = transformer.key_fields()
+        self.assert_list_equal(expected_key_fields, observed_key_fields)
+
+    def test_extract_key(self):
+        LOG.debug('Test get key from nova instance transformer')
+
+        transformer = get_nova_instance_transformer()
+
+        instance_specifications = [
+            get_instance_entity_spec_list('mock_nova_inst_snapshot.txt', 1),
+            get_instance_entity_spec_list('mock_nova_inst_update.txt', 1)
+        ]
+
+        spec_list = mock_sync.get_mock_generators(instance_specifications)
+        instance_events = mock_sync.generate_random_events_list(spec_list)
+
+        for event in instance_events:
+            observed_key = transformer.extract_key(event)
+            observed_key_fields = observed_key.split(nt.KEY_SEPARATOR)
+
+            self.assertEqual(nt.ENTITY_TYPE, observed_key_fields[0])
+            self.assertEqual(nt.INSTANCE_SUB_TYPE, observed_key_fields[1])
+
+            event_id = event[transformer.ENTITY_ID_DICT[event['sync_mode']]]
+            self.assertEqual(event_id, observed_key_fields[2])
+
+            expected_key = nt.KEY_SEPARATOR.join(
+                [nt.ENTITY_TYPE,
+                 nt.INSTANCE_SUB_TYPE,
+                 event_id])
+            self.assertEqual(expected_key, observed_key)

vitrage/utils/__init__.py

@@ -0,0 +1 @@
+__author__ = 'stack'