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>

1 files changed, 71 insertions, 0 deletions

diff --git a/yardstick/network_services/vnf_generic/vnfdgen.py b/yardstick/network_services/vnf_generic/vnfdgen.py
new file mode 100644
index 000000000..9a02050a2
--- /dev/null
+++ b/yardstick/network_services/vnf_generic/vnfdgen.py
@@ -0,0 +1,71 @@
+# 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.
+""" Generic file to map and build vnf discriptor """
+
+from __future__ import absolute_import
+import collections
+import yaml
+import six
+
+from yardstick.common.task_template import TaskTemplate
+
+
+def generate_vnfd(vnf_model, node):
+    """
+
+    :param vnf_model: VNF definition template, e.g. tg_ping_tpl.yaml
+    :param node: node configuration taken from pod.yaml
+    :return: Complete VNF Descriptor that will be taken
+             as input for GenericVNF.__init__
+    """
+    node["get"] = get
+    rendered_vnfd = TaskTemplate.render(vnf_model, **node)
+    # This is done to get rid of issues with serializing node
+    del node["get"]
+    filled_vnfd = yaml.load(rendered_vnfd)
+    return filled_vnfd
+
+
+def dict_key_flatten(data):
+    """ Convert nested dict structure to dotted key
+        (e.g. {"a":{"b":1}} -> {"a.b":1}
+
+    :param data: nested dictionary
+    :return: flat dicrionary
+    """
+    next_data = {}
+
+    if not any((isinstance(v, collections.Iterable) and not isinstance(v, str))
+               for v in data.values()):
+        return data
+
+    for key, val in six.iteritems(data):
+        if isinstance(val, collections.Mapping):
+            for n_k, n_v in six.iteritems(val):
+                next_data["%s.%s" % (key, n_k)] = n_v
+        elif isinstance(val, collections.Iterable) and not isinstance(val,
+                                                                      str):
+            for index, item in enumerate(val):
+                next_data["%s%d" % (key, index)] = item
+        else:
+            next_data[key] = val
+
+    return dict_key_flatten(next_data)
+
+
+def get(obj, key, *args):
+    """ Get template key from dictionary, get default value or raise an exception
+    """
+    data = dict_key_flatten(obj)
+    return data.get(key, *args)