Introducing Generic framework to do pre-deployment VNF & Network service testing

This patch introduces the framework which is aligned with ETSI-TST001

This patch adds:
1. NetworkServiceTestCase introduces following functions
      --> setup
            --> Verify if infrastructure mapping can meet topology
            --> Load VNF models
            --> Fill traffic profile with information from topology
            --> Provision VNFs
            --> Run experiment (traffic)
      --> run -> Yardstick calls run() at intervals defined in the yaml
                 and produces timestamped samples
      --> teardown --> Stop  VNFs

2. TrafficProfile is a generic class to get traffic profile for a given
   testcase and select the traffic generator for testcase.

3. QueueFileWrapper is a class to send/recive cmds to vnf

4. GenericVNF is a generic class to instantiate VNF

5. GenericTrafficGen is a generic class to run/listen/verify traffic.

JIRA: YARDSTICK-483
Change-Id: Ic453c917d34dcb508a7f3afb459011da85f6402e
Signed-off-by: Deepak S <deepak.s@linux.intel.com>

2 files changed, 64 insertions, 0 deletions

diff --git a/yardstick/network_services/traffic_profile/__init__.py b/yardstick/network_services/traffic_profile/__init__.py
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/yardstick/network_services/traffic_profile/__init__.py
diff --git a/yardstick/network_services/traffic_profile/base.py b/yardstick/network_services/traffic_profile/base.py
new file mode 100644
index 000000000..906498586
--- /dev/null
+++ b/yardstick/network_services/traffic_profile/base.py
@@ -0,0 +1,64 @@
+# Copyright (c) 2016-2017 Intel Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" Base class for the generic traffic profile implementation """
+
+from __future__ import absolute_import
+from yardstick.common.utils import import_modules_from_package, itersubclasses
+
+
+class TrafficProfile(object):
+    """
+    This class defines the behavior
+
+    """
+
+    @staticmethod
+    def get(tp_config):
+        """Get the traffic profile instance for the given traffic type
+
+        :param tp_config: loaded YAML file
+        :return:
+        """
+        profile_class = tp_config["traffic_profile"]["traffic_type"]
+        import_modules_from_package(
+            "yardstick.network_services.traffic_profile")
+        try:
+            return next(c for c in itersubclasses(TrafficProfile)
+                        if c.__name__ == profile_class)(tp_config)
+        except StopIteration:
+            raise RuntimeError("No implementation for %s", profile_class)
+
+    def __init__(self, tp_config):
+        # e.g. RFC2544 start_ip, stop_ip, drop_rate,
+        # IMIX = {"10K": 0.1, "100M": 0.5}
+        self.params = tp_config
+
+    def execute(self, traffic_generator):
+        """ This methods defines the behavior of the traffic generator.
+        It will be called in a loop until the traffic generator exits.
+
+        :param traffic_generator: TrafficGen instance
+        :return: None
+        """
+        raise NotImplementedError()
+
+
+class DummyProfile(TrafficProfile):
+    """
+    This is an empty TrafficProfile implementation - if it is used,
+    the traffic will be completely handled by the Traffic Generator
+    implementation with no regard for the Traffic Profile.
+    """
+    def execute(self, traffic_generator):
+        pass