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#
# -------------------------------------------------------------------------
# Copyright (c) 2015-2017 AT&T Intellectual Property
#
# 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.
#
# -------------------------------------------------------------------------
#
import time
from oslo_config import cfg
from oslo_log import log
from conductor.common import rest
from conductor.data.plugins.service_controller import base
from conductor.i18n import _LE
LOG = log.getLogger(__name__)
CONF = cfg.CONF
SDNC_OPTS = [
cfg.IntOpt('cache_refresh_interval',
default=1440,
help='Interval with which to refresh the local cache, '
'in minutes.'),
cfg.StrOpt('table_prefix',
default='sdnc',
help='Data Store table prefix.'),
cfg.StrOpt('server_url',
default='https://controller:8443/restconf/',
help='Base URL for SDN-C, up to and including the version.'),
cfg.StrOpt('username',
help='Basic Authentication Username'),
cfg.StrOpt('password',
help='Basic Authentication Password'),
cfg.StrOpt('sdnc_rest_timeout',
default='30',
help='Timeout for SDNC Rest Call'),
cfg.StrOpt('sdnc_retries',
default='3',
help='Retry Numbers for SDNC Rest Call'),
]
CONF.register_opts(SDNC_OPTS, group='sdnc')
class SDNC(base.ServiceControllerBase):
"""SDN Service Controller"""
def __init__(self):
"""Initializer"""
# FIXME(jdandrea): Pass this in to init.
self.conf = CONF
self.base = self.conf.sdnc.server_url.rstrip('/')
self.password = self.conf.sdnc.password
self.timeout = self.conf.sdnc.sdnc_rest_timeout
self.verify = False
self.retries = self.conf.sdnc.sdnc_retries
self.username = self.conf.sdnc.username
kwargs = {
"server_url": self.base,
"retries": self.retries,
"username": self.username,
"password": self.password,
"log_debug": self.conf.debug,
"read_timeout": self.timeout,
}
self.rest = rest.REST(**kwargs)
# Not sure what info from SDNC is cacheable
self._sdnc_cache = {}
def initialize(self):
"""Perform any late initialization."""
# self.filter_candidates([])
pass
def name(self):
"""Return human-readable name."""
return "SDN-C"
def _request(self, method='get', path='/', data=None,
context=None, value=None):
"""Performs HTTP request."""
kwargs = {
"method": method,
"path": path,
"data": data,
}
# TODO(jdandrea): Move timing/response logging into the rest helper?
start_time = time.time()
response = self.rest.request(**kwargs)
elapsed = time.time() - start_time
LOG.debug("Total time for SDN-C request "
"({0:}: {1:}): {2:.3f} sec".format(context, value, elapsed))
if response is None:
LOG.error(_LE("No response from SDN-C ({}: {})").
format(context, value))
raise Exception('SDN-C query {} timed out'.format(path))
elif response.status_code != 200:
LOG.error(_LE("SDN-C request ({}: {}) returned HTTP "
"status {} {}, link: {}{}").
format(context, value,
response.status_code, response.reason,
self.base, path))
return response
def reserve_candidates(self, candidate_list, request):
try:
LOG.debug("Request to reservation {} ".format(request))
return candidate_list
except Exception as exc:
LOG.error("Reservation error: {}".
format(exc))
return
def filter_candidates(self, request, candidate_list,
constraint_name, constraint_type, request_type):
"""Reduce candidate list based on SDN-C intelligence"""
selected_candidates = []
return selected_candidates
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