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#
#
# -------------------------------------------------------------------------
# Copyright (C) 2022 Wipro Limited.
#
# 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.
#
# -------------------------------------------------------------------------
#
from conductor.common import rest
from conductor.i18n import _LE
import json
from oslo_config import cfg
from oslo_log import log
import time
import uuid
LOG = log.getLogger(__name__)
CONF = cfg.CONF
DCAE_OPTS = [
cfg.StrOpt('table_prefix',
default='dcae',
help='Data Store table prefix.'),
cfg.StrOpt('server_url',
default='https://controller:8443/dcae',
help='Base URL for DCAE, up to and not including '
'the version, and without a trailing slash.'),
cfg.StrOpt('dcae_rest_timeout',
default='30',
help='Timeout for DCAE Rest Call'),
cfg.StrOpt('dcae_retries',
default='3',
help='Number of retry for DCAE Rest Call'),
cfg.StrOpt('server_url_version',
default='v1',
help='The version of DCAE in v# format.'),
cfg.StrOpt('certificate_file',
default='certificate.pem',
help='SSL/TLS certificate file in pem format.'
'This certificate must be registered with the A&AI '
'endpoint.'),
cfg.StrOpt('certificate_key_file',
default='certificate_key.pem',
help='Private Certificate Key file in pem format.'),
cfg.StrOpt('certificate_authority_bundle_file',
default='',
help='Certificate Authority Bundle file in pem format. '
'Must contain the appropriate trust chain for the '
'Certificate file.'),
cfg.StrOpt('username',
default='',
help='Username for DCAE'),
cfg.StrOpt('password',
default='',
help='Password for DCAE'),
cfg.StrOpt('get_slice_config_url',
default='',
help="url to get slice configuration from DCAE")
]
CONF.register_opts(DCAE_OPTS, group='dcae')
class DCAE(object):
"""DCAE Inventory Provider"""
def __init__(self):
"""Initializer"""
self.conf = CONF
self.base = self.conf.dcae.server_url.rstrip('/')
self.version = self.conf.dcae.server_url_version.rstrip('/')
self.cert = self.conf.dcae.certificate_file
self.key = self.conf.dcae.certificate_key_file
self.verify = self.conf.dcae.certificate_authority_bundle_file
self.timeout = self.conf.dcae.dcae_rest_timeout
self.retries = self.conf.dcae.dcae_retries
self.username = self.conf.dcae.username
self.password = self.conf.dcae.password
self._init_python_request()
def initialize(self):
"""Perform any late initialization."""
# Initialize the Python requests
# self._init_python_request()
def _init_python_request(self):
kwargs = {
"server_url": self.base,
"retries": self.retries,
"username": self.username,
"password": self.password,
"read_timeout": self.timeout,
"ca_bundle_file": self.verify,
}
self.rest = rest.REST(**kwargs)
def _dcae_versioned_path(self, path):
"""Return a URL path with the DCAE version prepended"""
return '/{}/{}'.format(self.version, path.lstrip('/'))
def capacity_filter(self, candidates):
candidatesList = {}
updated_candidateList = []
LOG.debug("from AAI ", candidates)
for candidate in candidates:
inventory_type = candidate.get('inventory_type')
candidate_id = candidate.get('candidate_id')
domain = candidate.get('domain')
response = self.get_dcae_response()
# max_no_of_connections = self.get_max_no_of_connections(response)
dLThpt = self.get_dLThpt(response, candidate_id)
uLThpt = self.get_uLThpt(response, candidate_id)
# max_no_of_pdu_sessions = self.get_max_no_of_pdu_sessions()
if inventory_type == 'nsi':
uLThpt_ServiceProfile = candidate.get('uLThptPerSlice')
dLThpt_ServiceProfile = candidate.get('dLThptPerSlice')
uLThpt_difference = self.get_difference(uLThpt_ServiceProfile, uLThpt)
dLThpt_difference = self.get_difference(dLThpt_ServiceProfile, dLThpt)
candidate['uLThpt_difference'] = uLThpt_difference
candidate['dLThpt_difference'] = dLThpt_difference
elif inventory_type == 'nssi' and (domain != 'tn_fh' and domain != 'tn_mh'):
uLThpt_SliceProfile = candidate.get('exp_data_rate_ul')
dLThpt_SliceProfile = candidate.get('exp_data_rate_dl')
uLThpt_difference = self.get_difference(uLThpt_SliceProfile, uLThpt)
dLThpt_difference = self.get_difference(dLThpt_SliceProfile, dLThpt)
candidate['uLThpt_difference'] = uLThpt_difference
candidate['dLThpt_difference'] = dLThpt_difference
# connections_difference = self.get_difference(max_no_of_pdu_sessions, max_no_of_connections)
elif inventory_type == 'nssi' and (domain == 'tn_fh' and domain == 'tn_mh'):
uLThpt_difference = 10
dLThpt_difference = 10
candidate['uLThpt_difference'] = uLThpt_difference
candidate['dLThpt_difference'] = dLThpt_difference
else:
LOG.debug("No difference attribute was added to the candidate")
candidatesList.update(candidate)
LOG.debug("capacity filter ", candidatesList)
updated_candidateList.append(candidatesList)
LOG.debug("updated candidate list ", updated_candidateList)
return updated_candidateList
# def get_max_no_of_connections(self, response, candidate_id)
# responseJson = json.loads(response)
# maxNoConns = responseJson['sliceConfigDetails'][candidate_id]['aggregatedConfig']['maxNumberOfConns']
# return maxNoConns
def get_uLThpt(self, response, candidate_id):
responseJson = json.loads(response)
configDetails = responseJson["sliceConfigDetails"]
for i in range(len(configDetails)):
if configDetails[i]["sliceIdentifier"] == candidate_id:
aggregatedConfig = configDetails[i]['aggregatedConfig']
uLThpt = aggregatedConfig.get("uLThptPerSlice")
return uLThpt
def get_dLThpt(self, response, candidate_id):
responseJson = json.loads(response)
configDetails = responseJson["sliceConfigDetails"]
for i in range(len(configDetails)):
if configDetails[i]["sliceIdentifier"] == candidate_id:
aggregatedConfig = configDetails[i]['aggregatedConfig']
dLThpt = aggregatedConfig.get("dLThptPerSlice")
return dLThpt
def get_difference(self, attribute1, attribute2):
LOG.debug("Computing the difference between two attributes")
difference = attribute1 - attribute2
return difference
def _request(self, method='get', path='/', data=None, context=None, value=None):
"""Performs HTTP request"""
headers = {
'X-FromAppId': 'CONDUCTOR',
'X-TransactionId': str(uuid.uuid4()),
}
kwargs = {
"method": method,
"path": path,
"headers": headers,
"data": data,
"content_type": "application/json"
}
start_time = time.time()
response = self.rest.request(**kwargs)
elapsed = time.time() - start_time
LOG.debug("Total time for DCAE request ({0:}: {1:}): {2:.3f} sec".format(context, value, elapsed))
if response is None:
LOG.error(_LE("No response from DCAE ({}: {})").format(context, value))
elif response.status_code != 200:
LOG.error(_LE("DCAE request ({}: {}) returned HTTP status {} {},"
"link: {}{}").format(context, value, response.status_code, response.reason, self.base, path))
return response
def get_dcae_response(self):
path = self.conf.dcae.get_slice_config_url
dcae_response = self._request('get', path, data=None)
if dcae_response is None or dcae_response.status_code != 200:
return None
if dcae_response:
return dcae_response
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