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# ============LICENSE_START===================================================
# Copyright (C) 2019-2020 Nordix Foundation.
# ============================================================================
# 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.
#
# SPDX-License-Identifier: Apache-2.0
# ============LICENSE_END=====================================================
import json
import os
import uuid
import requests
from requests.auth import HTTPBasicAuth
import mod.pmsh_logging as logger
from mod.subscription import Subscription, XnfFilter
def get_pmsh_subscription_data(cbs_data):
"""
Returns the PMSH subscription data
Args:
cbs_data: json app config from the Config Binding Service.
Returns:
Subscription, set(Xnf): `Subscription` <Subscription> object, set of XNFs to be added.
Raises:
RuntimeError: if AAI data cannot be retrieved.
"""
aai_xnf_data = _get_all_aai_xnf_data()
if aai_xnf_data:
sub = Subscription(**cbs_data['policy']['subscription'])
xnfs = _filter_xnf_data(aai_xnf_data, XnfFilter(**sub.nfFilter))
else:
raise RuntimeError('Failed to get data from AAI')
return sub, xnfs
def _get_all_aai_xnf_data():
"""
Return queried xnf data from the AAI service.
Returns:
json: the json response from AAI query, else None.
"""
xnf_data = None
try:
session = requests.Session()
aai_endpoint = f'{_get_aai_service_url()}{"/aai/v16/query"}'
headers = {'accept': 'application/json',
'content-type': 'application/json',
'x-fromappid': 'dcae-pmsh',
'x-transactionid': str(uuid.uuid1())}
json_data = """
{'start':
['network/pnfs',
'network/generic-vnfs']
}"""
params = {'format': 'simple', 'nodesOnly': 'true'}
response = session.put(aai_endpoint, headers=headers,
auth=HTTPBasicAuth('AAI', 'AAI'),
data=json_data, params=params, verify=False)
response.raise_for_status()
if response.ok:
xnf_data = json.loads(response.text)
except Exception as e:
logger.debug(e)
return xnf_data
def _get_aai_service_url():
"""
Returns the URL of the AAI kubernetes service.
Returns:
str: the AAI k8s service URL.
Raises:
KeyError: if AAI env vars not found.
"""
try:
aai_service = os.environ['AAI_SERVICE_HOST']
aai_ssl_port = os.environ['AAI_SERVICE_PORT_AAI_SSL']
return f'https://{aai_service}:{aai_ssl_port}'
except KeyError as e:
logger.debug(f'Failed to get AAI env vars: {e}')
raise
def _filter_xnf_data(xnf_data, xnf_filter):
"""
Returns a list of filtered xnfs using the xnf_filter .
Args:
xnf_data: the xnf json data from AAI.
xnf_filter: the `XnfFilter <XnfFilter>` to be applied.
Returns:
set: a set of filtered xnfs.
Raises:
KeyError: if AAI data cannot be parsed.
"""
xnf_set = set()
try:
for xnf in xnf_data['results']:
name_identifier = 'pnf-name' if xnf['node-type'] == 'pnf' else 'vnf-name'
if xnf_filter.is_xnf_in_filter(xnf['properties'].get(name_identifier)):
xnf_set.add(Xnf(xnf_name=xnf['properties'].get('name_identifier'),
orchestration_status=xnf['properties'].get('orchestration-status')))
except KeyError as e:
logger.debug(f'Failed to parse AAI data: {e}')
raise
return xnf_set
class Xnf:
def __init__(self, **kwargs):
"""
Object representation of the XNF.
"""
self.xnf_name = kwargs.get('xnf_name')
self.orchestration_status = kwargs.get('orchestration_status')
@classmethod
def xnf_def(cls):
return cls(xnf_name=None, orchestration_status=None)
def __str__(self):
return f'xnf-name: {self.xnf_name}, orchestration-status: {self.orchestration_status}'
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