85 lines
2.5 KiB
Python
85 lines
2.5 KiB
Python
# Copyright 2018 Rackspace, US Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from functools import partial
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import multiprocessing
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import os
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import signal
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import sys
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from oslo_config import cfg
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from oslo_log import log as logging
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from oslo_reports import guru_meditation_report as gmr
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from octavia.api.drivers.driver_agent import driver_listener
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from octavia.common import service
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from octavia import version
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CONF = cfg.CONF
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LOG = logging.getLogger(__name__)
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def _mutate_config(*args, **kwargs):
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CONF.mutate_config_files()
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def _handle_mutate_config(status_proc_pid, stats_proc_pid, *args, **kwargs):
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LOG.info("Driver agent received HUP signal, mutating config.")
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_mutate_config()
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os.kill(status_proc_pid, signal.SIGHUP)
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os.kill(stats_proc_pid, signal.SIGHUP)
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def main():
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service.prepare_service(sys.argv)
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gmr.TextGuruMeditation.setup_autorun(version)
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processes = []
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exit_event = multiprocessing.Event()
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status_listener_proc = multiprocessing.Process(
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name='status_listener', target=driver_listener.status_listener,
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args=(exit_event,))
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processes.append(status_listener_proc)
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LOG.info("Driver agent status listener process starts:")
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status_listener_proc.start()
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stats_listener_proc = multiprocessing.Process(
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name='stats_listener', target=driver_listener.stats_listener,
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args=(exit_event,))
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processes.append(stats_listener_proc)
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LOG.info("Driver agent statistics listener process starts:")
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stats_listener_proc.start()
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def process_cleanup(*args, **kwargs):
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LOG.info("Driver agent exiting due to signal")
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exit_event.set()
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status_listener_proc.join()
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stats_listener_proc.join()
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signal.signal(signal.SIGTERM, process_cleanup)
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signal.signal(signal.SIGHUP, partial(
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_handle_mutate_config, status_listener_proc.pid,
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stats_listener_proc.pid))
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try:
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for process in processes:
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process.join()
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except KeyboardInterrupt:
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process_cleanup()
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