124 lines
3.4 KiB
Python
124 lines
3.4 KiB
Python
# Copyright 2020 LINE Corp.
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# All Rights Reserved.
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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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import os
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import select
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import signal
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import socket
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import stat
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import sys
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import threading
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from wsgiref.simple_server import make_server
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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 prometheus_client import make_wsgi_app
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from oslo_metrics import message_router
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oslo_metrics_configs = [
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cfg.StrOpt('metrics_socket_file',
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default='/var/tmp/metrics_collector.sock',
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help='Unix domain socket file to be used'
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'to send rpc related metrics'),
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]
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cfg.CONF.register_opts(oslo_metrics_configs, group='oslo_metrics')
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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logging.register_options(CONF)
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logging.setup(CONF, 'oslo-metrics')
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LOG.logger.setLevel(logging.DEBUG)
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class MetricsListener():
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def __init__(self, socket_path):
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self.socket_path = socket_path
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self.socket = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
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self.unlink(socket_path)
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self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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self.socket.bind(self.socket_path)
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self.start = True
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self.router = message_router.MessageRouter()
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def unlink(self, socket_path):
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try:
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os.unlink(socket_path)
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except OSError:
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if os.path.exists(socket_path):
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raise
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def serve(self):
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while self.start:
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readable, writable, exceptional = select.select(
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[self.socket], [], [], 1)
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if len(readable) == 0:
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continue
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try:
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LOG.debug("wait for socket.recv")
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# 1 message size should be smaller than 65565
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msg = self.socket.recv(65565)
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LOG.debug("got message")
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self.router.process(msg)
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except socket.timeout:
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pass
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def stop(self):
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self.socket.close()
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self.start = False
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httpd = None
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def handle_sigterm(_signum, _frame):
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LOG.debug("Caught sigterm")
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shutdown_thread = threading.Thread(target=httpd.shutdown)
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shutdown_thread.start()
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def main():
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cfg.CONF(sys.argv[1:])
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socket_path = cfg.CONF.oslo_metrics.metrics_socket_file
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m = MetricsListener(socket_path)
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try:
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os.chmod(socket_path, stat.S_IRWXU | stat.S_IRWXO)
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except OSError:
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LOG.error("Changing the mode of the file failed.... continuing")
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mt = threading.Thread(target=m.serve)
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LOG.info("Start oslo.metrics")
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mt.start()
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app = make_wsgi_app()
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try:
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global httpd
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httpd = make_server('', 3000, app)
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signal.signal(signal.SIGTERM, handle_sigterm)
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httpd.serve_forever()
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except KeyboardInterrupt:
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pass
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finally:
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LOG.info("Try to stop...")
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os.remove(cfg.CONF.oslo_metrics.metrics_socket_file)
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m.stop()
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httpd.server_close()
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if __name__ == "__main__":
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main()
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