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# Copyright 2021-2023 H2020 TeraFlow (https://www.teraflow-h2020.eu/)
#
# 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 logging, signal, sys, threading
from prometheus_client import start_http_server
from common.Settings import get_setting, wait_for_environment_variables
from context.client.ContextClient import ContextClient
from interdomain.service.RemoteDomainClients import RemoteDomainClients
from interdomain.Config import (
CONTEXT_SERVICE_HOST, CONTEXT_SERVICE_PORT, SLICE_SERVICE_HOST, SLICE_SERVICE_PORT, GRPC_SERVICE_PORT,
GRPC_MAX_WORKERS, GRPC_GRACE_PERIOD, LOG_LEVEL, METRICS_PORT)
from slice.client.SliceClient import SliceClient
from .InterdomainService import InterdomainService
terminate = threading.Event()
LOGGER : logging.Logger = None
def signal_handler(signal, frame): # pylint: disable=redefined-outer-name
LOGGER.warning('Terminate signal received')
terminate.set()
def main():
global LOGGER # pylint: disable=global-statement
grpc_service_port = get_setting('INTERDOMAINSERVICE_SERVICE_PORT_GRPC', default=GRPC_SERVICE_PORT )
max_workers = get_setting('MAX_WORKERS', default=GRPC_MAX_WORKERS )
grace_period = get_setting('GRACE_PERIOD', default=GRPC_GRACE_PERIOD )
log_level = get_setting('LOG_LEVEL', default=LOG_LEVEL )
metrics_port = get_setting('METRICS_PORT', default=METRICS_PORT )
logging.basicConfig(level=log_level)
LOGGER = logging.getLogger(__name__)
wait_for_environment_variables([
'CONTEXTSERVICE_SERVICE_HOST', 'CONTEXTSERVICE_SERVICE_PORT_GRPC',
'SLICESERVICE_SERVICE_HOST', 'SLICESERVICE_SERVICE_PORT_GRPC',
])
context_service_host = get_setting('CONTEXTSERVICE_SERVICE_HOST', default=CONTEXT_SERVICE_HOST )
context_service_port = get_setting('CONTEXTSERVICE_SERVICE_PORT_GRPC', default=CONTEXT_SERVICE_PORT )
slice_service_host = get_setting('SLICESERVICE_SERVICE_HOST', default=SLICE_SERVICE_HOST )
slice_service_port = get_setting('SLICESERVICE_SERVICE_PORT_GRPC', default=SLICE_SERVICE_PORT )
signal.signal(signal.SIGINT, signal_handler)
signal.signal(signal.SIGTERM, signal_handler)
LOGGER.info('Starting...')
# Start metrics server
start_http_server(metrics_port)
# Initialize Context Client
if context_service_host is None or context_service_port is None:
raise Exception('Wrong address({:s}):port({:s}) of Context component'.format(
str(context_service_host), str(context_service_port)))
context_client = ContextClient(context_service_host, context_service_port)
# Initialize Slice Client
if slice_service_host is None or slice_service_port is None:
raise Exception('Wrong address({:s}):port({:s}) of Slice component'.format(
str(slice_service_host), str(slice_service_port)))
slice_client = SliceClient(slice_service_host, slice_service_port)
# Define remote domain clients
remote_domain_clients = RemoteDomainClients()
# Starting Interdomain service
grpc_service = InterdomainService(
context_client, slice_client, remote_domain_clients, port=grpc_service_port, max_workers=max_workers,
grace_period=grace_period)
grpc_service.start()
remote_domain_clients.add_peer('remote-teraflow', 'remote-teraflow', GRPC_SERVICE_PORT)
# Wait for Ctrl+C or termination signal
while not terminate.wait(timeout=0.1): pass
LOGGER.info('Terminating...')
grpc_service.stop()
LOGGER.info('Bye')
return 0
if __name__ == '__main__':
sys.exit(main())