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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 uuid
from os import environ
import requests
from requests.auth import HTTPBasicAuth
import mod.pmsh_logging as logger
from mod.network_function import NetworkFunction, NetworkFunctionFilter
from mod.subscription import Subscription
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(NetworkFunctions): `Subscription` <Subscription> object,
set of NetworkFunctions to be added.
Raises:
RuntimeError: if AAI data cannot be retrieved.
"""
aai_nf_data = _get_all_aai_nf_data()
if aai_nf_data:
sub = Subscription(**cbs_data['policy']['subscription'])
nfs = _filter_nf_data(aai_nf_data, NetworkFunctionFilter(**sub.nfFilter))
else:
raise RuntimeError('Failed to get data from AAI')
return sub, nfs
def _get_all_aai_nf_data():
"""
Return queried nf data from the AAI service.
Returns:
json: the json response from AAI query, else None.
"""
nf_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:
nf_data = json.loads(response.text)
except Exception as e:
logger.debug(e)
return nf_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 = environ['AAI_SERVICE_HOST']
aai_ssl_port = 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_nf_data(nf_data, nf_filter):
"""
Returns a list of filtered NetworkFunctions using the nf_filter.
Args:
nf_data : the nf json data from AAI.
nf_filter: the `NetworkFunctionFilter <NetworkFunctionFilter>` to be applied.
Returns:
set: a set of filtered NetworkFunctions.
Raises:
KeyError: if AAI data cannot be parsed.
"""
nf_set = set()
try:
for nf in nf_data['results']:
name_identifier = 'pnf-name' if nf['node-type'] == 'pnf' else 'vnf-name'
orchestration_status = nf['properties'].get('orchestration-status')
if nf_filter.is_nf_in_filter(nf['properties'].get(name_identifier),
orchestration_status):
nf_set.add(NetworkFunction(
nf_name=nf['properties'].get(name_identifier),
orchestration_status=orchestration_status))
except KeyError as e:
logger.debug(f'Failed to parse AAI data: {e}')
raise
return nf_set
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