| #!/usr/bin/env python |
| # |
| # Copyright 2016 the original author or authors. |
| # |
| # 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. |
| # |
| |
| """ virtual OLT Hardware Abstraction """ |
| |
| import argparse |
| import logging |
| import sys |
| import structlog |
| |
| |
| def parse_args(): |
| |
| parser = argparse.ArgumentParser() |
| |
| parser.add_argument('-i', '--interface', dest='interface', action='store', default='eth0', |
| help='ETH interface to send (default: eth0)') |
| parser.add_argument('--no-banner', dest='no_banner', action='store_true', default=False, |
| help='omit startup banner log lines') |
| parser.add_argument('-v', '--verbose', dest='verbose', action='store_true', default=False, |
| help='enable verbose logging') |
| parser.add_argument('-q', '--quiet', dest='quiet', action='store_true', default=False, |
| help="suppress debug and info logs") |
| |
| return parser.parse_args() |
| |
| |
| def setup_logging(args): |
| """ |
| Set up logging such that: |
| - The primary logging entry method is structlog (see http://structlog.readthedocs.io/en/stable/index.html) |
| - By default, the logging backend is Python standard lib logger |
| - In the future, fluentd or other backends will be supported too |
| """ |
| |
| # Configure standard logging |
| DATEFMT = '%Y-%m-%dT%H:%M:%S' |
| FORMAT = '%(asctime)-15s.%(msecs)03d %(levelname)-8s %(msg)s' |
| level = logging.DEBUG if args.verbose else (logging.WARN if args.quiet else logging.INFO) |
| logging.basicConfig(stream=sys.stdout, level=level, format=FORMAT, datefmt=DATEFMT) |
| |
| # Hook up structlog to standard logging |
| processors = [ |
| structlog.processors.StackInfoRenderer(), |
| structlog.processors.format_exc_info, |
| structlog.processors.KeyValueRenderer(), # structlog.processorsJSONRenderer(), |
| |
| ] |
| structlog.configure(logger_factory=structlog.stdlib.LoggerFactory(), processors=processors) |
| |
| # Mark first line of log |
| log = structlog.get_logger() |
| log.info("first-line") |
| return log |
| |
| |
| def print_banner(args, log): |
| log.info(' _ ______ __ ________ _____ ') |
| log.info('| | / / __ \/ / /_ __/ / / / |') |
| log.info('| | / / / / / / / / / /_/ / /| |') |
| log.info('| |/ / /_/ / /___/ / / __ / ___ |') |
| log.info('|___/\____/_____/_/ /_/ /_/_/ |_|') |
| log.info('(to stop: press Ctrl-C)') |
| |
| |
| def cleanup(log): |
| """Execute before the reactor is shut down""" |
| log.info('exiting-on-keyboard-interrupt') |
| |
| |
| def start_reactor(args, log): |
| from twisted.internet import reactor |
| reactor.callWhenRunning(lambda: log.info('twisted-reactor-started')) |
| reactor.addSystemEventTrigger('before', 'shutdown', lambda: cleanup(log)) |
| reactor.run() |
| |
| |
| def main(): |
| args = parse_args() |
| log = setup_logging(args) |
| if not args.no_banner: |
| print_banner(args, log) |
| start_reactor(args, log) # will not return except Keyboard interrupt |
| |
| |
| if __name__ == '__main__': |
| main() |