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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
from os import environ
import requests
from requests.auth import HTTPBasicAuth
import mod.network_function
import mod.pmsh_utils
from mod import logger
def get_pmsh_nfs_from_aai(app_conf):
"""
Returns the Network Functions from AAI related to the Subscription.
Args:
app_conf (AppConfig): the AppConfig object.
Returns:
NetworkFunctions (list): list of NetworkFunctions.
Raises:
RuntimeError: if AAI Network Function data cannot be retrieved.
"""
aai_nf_data = _get_all_aai_nf_data(app_conf)
if aai_nf_data:
nfs = _filter_nf_data(aai_nf_data, app_conf)
else:
raise RuntimeError('Failed to get data from AAI')
return nfs
def _get_all_aai_nf_data(app_conf):
"""
Return queried nf data from the AAI service.
Args:
app_conf (AppConfig): the AppConfig object.
Returns:
dict: the json response from AAI query, else None.
"""
nf_data = None
try:
session = requests.Session()
aai_named_query_endpoint = f'{_get_aai_service_url()}{"/query"}'
logger.info('Fetching XNFs from AAI.')
headers = _get_aai_request_headers()
data = """
{'start':
['network/pnfs',
'network/generic-vnfs']
}"""
params = {'format': 'simple', 'nodesOnly': 'true'}
response = session.put(aai_named_query_endpoint, headers=headers,
auth=HTTPBasicAuth(app_conf.aaf_creds.get('aaf_id'),
app_conf.aaf_creds.get('aaf_pass')),
data=data, params=params,
verify=(app_conf.ca_cert_path if app_conf.enable_tls else False),
cert=(app_conf.cert_params if app_conf.enable_tls else None))
response.raise_for_status()
if response.ok:
nf_data = json.loads(response.text)
logger.info('Successfully fetched XNFs from AAI')
logger.debug(f'XNFs from AAI: {nf_data}')
except Exception as e:
logger.error(f'Failed to get XNFs from AAI: {e}', exc_info=True)
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 var not found.
"""
try:
aai_ssl_port = environ['AAI_SERVICE_PORT']
return f'https://aai:{aai_ssl_port}/aai/v21'
except KeyError as e:
logger.error(f'Failed to get AAI env var: {e}', exc_info=True)
raise
@mod.pmsh_utils.mdc_handler
def _get_aai_request_headers(**kwargs):
return {'accept': 'application/json',
'content-type': 'application/json',
'x-fromappid': 'dcae-pmsh',
'x-transactionid': kwargs['request_id'],
'InvocationID': kwargs['invocation_id'],
'RequestID': kwargs['request_id']}
def _filter_nf_data(nf_data, app_conf):
"""
Returns a list of filtered NetworkFunctions using the nf_filter.
Args:
nf_data (dict): the nf json data from AAI.
app_conf (AppConfig): the AppConfig object.
Returns:
NetworkFunction (list): a list of filtered NetworkFunction Objects.
Raises:
KeyError: if AAI data cannot be parsed.
"""
nf_list = []
try:
for nf in nf_data['results']:
if nf['properties'].get('orchestration-status') != 'Active':
continue
name_identifier = 'pnf-name' if nf['node-type'] == 'pnf' else 'vnf-name'
new_nf = mod.network_function.NetworkFunction(
nf_name=nf['properties'].get(name_identifier),
ip_address=nf['properties'].get('ipaddress-v4-oam'),
model_invariant_id=nf['properties'].get('model-invariant-id'),
model_version_id=nf['properties'].get('model-version-id'))
if not new_nf.set_nf_model_params(app_conf):
continue
if app_conf.nf_filter.is_nf_in_filter(new_nf):
nf_list.append(new_nf)
except KeyError as e:
logger.error(f'Failed to parse AAI data: {e}', exc_info=True)
raise
return nf_list
def get_aai_model_data(app_conf, model_invariant_id, model_version_id, nf_name):
"""
Get the sdnc_model info for the xNF from AAI.
Args:
model_invariant_id (str): the AAI model-invariant-id
model_version_id (str): the AAI model-version-id
app_conf (AppConfig): the AppConfig object.
nf_name (str): The xNF name.
Returns:
json (dict): the sdnc_model json object.
Raises:
Exception: if AAI model data cannot be retrieved.
"""
try:
session = requests.Session()
aai_model_ver_endpoint = \
f'{_get_aai_service_url()}/service-design-and-creation/models/model/' \
f'{model_invariant_id}/model-vers/model-ver/{model_version_id}'
logger.info(f'Fetching sdnc-model info for xNF: {nf_name} from AAI.')
headers = _get_aai_request_headers()
response = session.get(aai_model_ver_endpoint, headers=headers,
auth=HTTPBasicAuth(app_conf.aaf_creds.get('aaf_id'),
app_conf.aaf_creds.get('aaf_pass')),
verify=(app_conf.ca_cert_path if app_conf.enable_tls else False),
cert=(app_conf.cert_params if app_conf.enable_tls else None))
response.raise_for_status()
if response.ok:
data = json.loads(response.text)
logger.debug(f'Successfully fetched sdnc-model info from AAI: {data}')
return data
except Exception:
raise
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