1 # Copyright (c) 2016-2017 Intel Corporation
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
14 """ Generic file to map and build vnf discriptor """
16 from __future__ import absolute_import
23 def render(vnf_model, **kwargs):
24 """Render jinja2 VNF template
26 :param vnf_model: string that contains template
27 :param kwargs: Dict with template arguments
28 :returns:rendered template str
31 return jinja2.Template(vnf_model).render(**kwargs)
34 def generate_vnfd(vnf_model, node):
37 :param vnf_model: VNF definition template, e.g. tg_ping_tpl.yaml
38 :param node: node configuration taken from pod.yaml
39 :return: Complete VNF Descriptor that will be taken
40 as input for GenericVNF.__init__
42 # get is unused as global method inside template
44 # Set Node details to default if not defined in pod file
45 # we CANNOT use TaskTemplate.render because it does not allow
46 # for missing variables, we need to allow password for key_filename
48 rendered_vnfd = render(vnf_model, **node)
49 # This is done to get rid of issues with serializing node
51 filled_vnfd = yaml.load(rendered_vnfd)
55 def dict_key_flatten(data):
56 """ Convert nested dict structure to dotted key
57 (e.g. {"a":{"b":1}} -> {"a.b":1}
59 :param data: nested dictionary
60 :return: flat dicrionary
64 # check for non-string iterables
65 if not any((isinstance(v, collections.Iterable) and not isinstance(v, str))
66 for v in data.values()):
69 for key, val in data.items():
70 if isinstance(val, collections.Mapping):
71 for n_k, n_v in val.items():
72 next_data["%s.%s" % (key, n_k)] = n_v
73 elif isinstance(val, collections.Iterable) and not isinstance(val,
75 for index, item in enumerate(val):
76 next_data["%s%d" % (key, index)] = item
80 return dict_key_flatten(next_data)
83 def get(obj, key, *args):
84 """ Get template key from dictionary, get default value or raise an exception
86 data = dict_key_flatten(obj)
87 return data.get(key, *args)