From 9a0eac92936a12e23fc0a0016988626b1bf5d235 Mon Sep 17 00:00:00 2001 From: vinod pandarinathan Date: Sat, 6 Jun 2015 05:28:11 -0700 Subject: [PATCH] Add openstack common files eventlet Change-Id: I11cd385ccee6d45290d9df887cabd7c7b2e98dad --- .../openstack/common/eventlet_backdoor.py | 151 ++++++++++++++++++ openstack-common.conf | 2 + 2 files changed, 153 insertions(+) create mode 100644 cloudpulse/openstack/common/eventlet_backdoor.py diff --git a/cloudpulse/openstack/common/eventlet_backdoor.py b/cloudpulse/openstack/common/eventlet_backdoor.py new file mode 100644 index 0000000..cd4f357 --- /dev/null +++ b/cloudpulse/openstack/common/eventlet_backdoor.py @@ -0,0 +1,151 @@ +# Copyright (c) 2012 OpenStack Foundation. +# Administrator of the National Aeronautics and Space Administration. +# All Rights Reserved. +# +# 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. + +from __future__ import print_function + +import copy +import errno +import gc +import logging +import os +import pprint +import socket +import sys +import traceback + +import eventlet.backdoor +import greenlet +from oslo_config import cfg + +from cloudpulse.openstack.common._i18n import _LI + +help_for_backdoor_port = ( + "Acceptable values are 0, , and :, where 0 results " + "in listening on a random tcp port number; results in listening " + "on the specified port number (and not enabling backdoor if that port " + "is in use); and : results in listening on the smallest " + "unused port number within the specified range of port numbers. The " + "chosen port is displayed in the service's log file.") +eventlet_backdoor_opts = [ + cfg.StrOpt('backdoor_port', + help="Enable eventlet backdoor. %s" % help_for_backdoor_port) +] + +CONF = cfg.CONF +CONF.register_opts(eventlet_backdoor_opts) +LOG = logging.getLogger(__name__) + + +def list_opts(): + """Entry point for oslo-config-generator. + """ + return [(None, copy.deepcopy(eventlet_backdoor_opts))] + + +class EventletBackdoorConfigValueError(Exception): + def __init__(self, port_range, help_msg, ex): + msg = ('Invalid backdoor_port configuration %(range)s: %(ex)s. ' + '%(help)s' % + {'range': port_range, 'ex': ex, 'help': help_msg}) + super(EventletBackdoorConfigValueError, self).__init__(msg) + self.port_range = port_range + + +def _dont_use_this(): + print("Don't use this, just disconnect instead") + + +def _find_objects(t): + return [o for o in gc.get_objects() if isinstance(o, t)] + + +def _print_greenthreads(): + for i, gt in enumerate(_find_objects(greenlet.greenlet)): + print(i, gt) + traceback.print_stack(gt.gr_frame) + print() + + +def _print_nativethreads(): + for threadId, stack in sys._current_frames().items(): + print(threadId) + traceback.print_stack(stack) + print() + + +def _parse_port_range(port_range): + if ':' not in port_range: + start, end = port_range, port_range + else: + start, end = port_range.split(':', 1) + try: + start, end = int(start), int(end) + if end < start: + raise ValueError + return start, end + except ValueError as ex: + raise EventletBackdoorConfigValueError(port_range, ex, + help_for_backdoor_port) + + +def _listen(host, start_port, end_port, listen_func): + try_port = start_port + while True: + try: + return listen_func((host, try_port)) + except socket.error as exc: + if (exc.errno != errno.EADDRINUSE or + try_port >= end_port): + raise + try_port += 1 + + +def initialize_if_enabled(): + backdoor_locals = { + 'exit': _dont_use_this, # So we don't exit the entire process + 'quit': _dont_use_this, # So we don't exit the entire process + 'fo': _find_objects, + 'pgt': _print_greenthreads, + 'pnt': _print_nativethreads, + } + + if CONF.backdoor_port is None: + return None + + start_port, end_port = _parse_port_range(str(CONF.backdoor_port)) + + # NOTE(johannes): The standard sys.displayhook will print the value of + # the last expression and set it to __builtin__._, which overwrites + # the __builtin__._ that gettext sets. Let's switch to using pprint + # since it won't interact poorly with gettext, and it's easier to + # read the output too. + def displayhook(val): + if val is not None: + pprint.pprint(val) + sys.displayhook = displayhook + + sock = _listen('localhost', start_port, end_port, eventlet.listen) + + # In the case of backdoor port being zero, a port number is assigned by + # listen(). In any case, pull the port number out here. + port = sock.getsockname()[1] + LOG.info( + _LI('Eventlet backdoor listening on %(port)s for process %(pid)d'), + {'port': port, 'pid': os.getpid()} + ) + eventlet.spawn_n(eventlet.backdoor.backdoor_server, sock, + locals=backdoor_locals) + return port diff --git a/openstack-common.conf b/openstack-common.conf index a29e30c..76efe3d 100644 --- a/openstack-common.conf +++ b/openstack-common.conf @@ -1,5 +1,7 @@ [DEFAULT] module=cliutils +module=eventlet_backdoor + # The list of modules to copy from oslo-incubator.git # The base module to hold the copy of openstack.common