Merge "Clean up openstack-common.conf"
This commit is contained in:
Jenkins
Gerrit Code Review
commit
edc4856e06
@ -1,89 +0,0 @@
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (c) 2012 OpenStack Foundation.
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# Administrator of the National Aeronautics and Space Administration.
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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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from __future__ import print_function
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import gc
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import pprint
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import sys
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import traceback
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import eventlet
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import eventlet.backdoor
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import greenlet
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from oslo.config import cfg
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eventlet_backdoor_opts = [
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cfg.IntOpt('backdoor_port',
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default=None,
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help='port for eventlet backdoor to listen')
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]
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CONF = cfg.CONF
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CONF.register_opts(eventlet_backdoor_opts)
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def _dont_use_this():
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print("Don't use this, just disconnect instead")
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def _find_objects(t):
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return filter(lambda o: isinstance(o, t), gc.get_objects())
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def _print_greenthreads():
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for i, gt in enumerate(_find_objects(greenlet.greenlet)):
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print(i, gt)
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traceback.print_stack(gt.gr_frame)
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print()
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def _print_nativethreads():
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for threadId, stack in sys._current_frames().items():
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print(threadId)
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traceback.print_stack(stack)
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print()
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def initialize_if_enabled():
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backdoor_locals = {
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'exit': _dont_use_this, # So we don't exit the entire process
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'quit': _dont_use_this, # So we don't exit the entire process
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'fo': _find_objects,
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'pgt': _print_greenthreads,
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'pnt': _print_nativethreads,
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}
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if CONF.backdoor_port is None:
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return None
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# NOTE(johannes): The standard sys.displayhook will print the value of
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# the last expression and set it to __builtin__._, which overwrites
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# the __builtin__._ that gettext sets. Let's switch to using pprint
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# since it won't interact poorly with gettext, and it's easier to
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# read the output too.
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def displayhook(val):
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if val is not None:
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pprint.pprint(val)
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sys.displayhook = displayhook
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sock = eventlet.listen(('localhost', CONF.backdoor_port))
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port = sock.getsockname()[1]
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eventlet.spawn_n(eventlet.backdoor.backdoor_server, sock,
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locals=backdoor_locals)
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return port
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@ -1,147 +0,0 @@
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# Copyright 2011 Justin Santa Barbara
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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 sys
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from eventlet import event
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from eventlet import greenthread
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from glance.openstack.common.gettextutils import _
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from glance.openstack.common import log as logging
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from glance.openstack.common import timeutils
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LOG = logging.getLogger(__name__)
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class LoopingCallDone(Exception):
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"""Exception to break out and stop a LoopingCall.
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The poll-function passed to LoopingCall can raise this exception to
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break out of the loop normally. This is somewhat analogous to
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StopIteration.
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An optional return-value can be included as the argument to the exception;
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this return-value will be returned by LoopingCall.wait()
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"""
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def __init__(self, retvalue=True):
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""":param retvalue: Value that LoopingCall.wait() should return."""
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self.retvalue = retvalue
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class LoopingCallBase(object):
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def __init__(self, f=None, *args, **kw):
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self.args = args
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self.kw = kw
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self.f = f
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self._running = False
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self.done = None
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def stop(self):
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self._running = False
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def wait(self):
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return self.done.wait()
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class FixedIntervalLoopingCall(LoopingCallBase):
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"""A fixed interval looping call."""
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def start(self, interval, initial_delay=None):
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self._running = True
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done = event.Event()
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def _inner():
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if initial_delay:
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greenthread.sleep(initial_delay)
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try:
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while self._running:
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start = timeutils.utcnow()
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self.f(*self.args, **self.kw)
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end = timeutils.utcnow()
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if not self._running:
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break
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delay = interval - timeutils.delta_seconds(start, end)
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if delay <= 0:
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LOG.warn(_('task run outlasted interval by %s sec') %
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-delay)
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greenthread.sleep(delay if delay > 0 else 0)
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except LoopingCallDone as e:
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self.stop()
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done.send(e.retvalue)
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except Exception:
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LOG.exception(_('in fixed duration looping call'))
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done.send_exception(*sys.exc_info())
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return
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else:
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done.send(True)
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self.done = done
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greenthread.spawn_n(_inner)
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return self.done
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# TODO(mikal): this class name is deprecated in Havana and should be removed
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# in the I release
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LoopingCall = FixedIntervalLoopingCall
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class DynamicLoopingCall(LoopingCallBase):
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"""A looping call which sleeps until the next known event.
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The function called should return how long to sleep for before being
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called again.
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"""
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def start(self, initial_delay=None, periodic_interval_max=None):
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self._running = True
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done = event.Event()
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def _inner():
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if initial_delay:
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greenthread.sleep(initial_delay)
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try:
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while self._running:
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idle = self.f(*self.args, **self.kw)
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if not self._running:
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break
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if periodic_interval_max is not None:
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idle = min(idle, periodic_interval_max)
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LOG.debug(_('Dynamic looping call sleeping for %.02f '
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'seconds'), idle)
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greenthread.sleep(idle)
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except LoopingCallDone as e:
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self.stop()
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done.send(e.retvalue)
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except Exception:
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LOG.exception(_('in dynamic looping call'))
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done.send_exception(*sys.exc_info())
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return
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else:
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done.send(True)
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self.done = done
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greenthread.spawn(_inner)
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return self.done
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@ -1,332 +0,0 @@
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# Copyright 2011 Justin Santa Barbara
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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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"""Generic Node base class for all workers that run on hosts."""
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import errno
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import os
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import random
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import signal
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import sys
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import time
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import eventlet
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import logging as std_logging
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from oslo.config import cfg
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from glance.openstack.common import eventlet_backdoor
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from glance.openstack.common.gettextutils import _
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from glance.openstack.common import importutils
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from glance.openstack.common import log as logging
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from glance.openstack.common import threadgroup
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rpc = importutils.try_import('glance.openstack.common.rpc')
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CONF = cfg.CONF
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LOG = logging.getLogger(__name__)
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class Launcher(object):
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"""Launch one or more services and wait for them to complete."""
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def __init__(self):
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"""Initialize the service launcher.
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:returns: None
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"""
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self._services = threadgroup.ThreadGroup()
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eventlet_backdoor.initialize_if_enabled()
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@staticmethod
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def run_service(service):
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"""Start and wait for a service to finish.
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:param service: service to run and wait for.
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:returns: None
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"""
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service.start()
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service.wait()
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def launch_service(self, service):
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"""Load and start the given service.
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:param service: The service you would like to start.
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:returns: None
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"""
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self._services.add_thread(self.run_service, service)
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def stop(self):
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"""Stop all services which are currently running.
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:returns: None
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"""
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self._services.stop()
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def wait(self):
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"""Waits until all services have been stopped, and then returns.
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:returns: None
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"""
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self._services.wait()
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class SignalExit(SystemExit):
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def __init__(self, signo, exccode=1):
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super(SignalExit, self).__init__(exccode)
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self.signo = signo
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class ServiceLauncher(Launcher):
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def _handle_signal(self, signo, frame):
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# Allow the process to be killed again and die from natural causes
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signal.signal(signal.SIGTERM, signal.SIG_DFL)
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signal.signal(signal.SIGINT, signal.SIG_DFL)
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raise SignalExit(signo)
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def wait(self):
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signal.signal(signal.SIGTERM, self._handle_signal)
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signal.signal(signal.SIGINT, self._handle_signal)
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LOG.debug(_('Full set of CONF:'))
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CONF.log_opt_values(LOG, std_logging.DEBUG)
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status = None
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try:
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super(ServiceLauncher, self).wait()
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except SignalExit as exc:
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signame = {signal.SIGTERM: 'SIGTERM',
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signal.SIGINT: 'SIGINT'}[exc.signo]
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LOG.info(_('Caught %s, exiting'), signame)
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status = exc.code
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except SystemExit as exc:
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status = exc.code
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finally:
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if rpc:
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rpc.cleanup()
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self.stop()
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return status
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class ServiceWrapper(object):
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def __init__(self, service, workers):
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self.service = service
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self.workers = workers
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self.children = set()
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self.forktimes = []
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class ProcessLauncher(object):
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def __init__(self):
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self.children = {}
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self.sigcaught = None
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self.running = True
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rfd, self.writepipe = os.pipe()
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self.readpipe = eventlet.greenio.GreenPipe(rfd, 'r')
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signal.signal(signal.SIGTERM, self._handle_signal)
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signal.signal(signal.SIGINT, self._handle_signal)
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def _handle_signal(self, signo, frame):
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self.sigcaught = signo
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self.running = False
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# Allow the process to be killed again and die from natural causes
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signal.signal(signal.SIGTERM, signal.SIG_DFL)
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signal.signal(signal.SIGINT, signal.SIG_DFL)
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def _pipe_watcher(self):
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# This will block until the write end is closed when the parent
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# dies unexpectedly
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self.readpipe.read()
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LOG.info(_('Parent process has died unexpectedly, exiting'))
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sys.exit(1)
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def _child_process(self, service):
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# Setup child signal handlers differently
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def _sigterm(*args):
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signal.signal(signal.SIGTERM, signal.SIG_DFL)
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raise SignalExit(signal.SIGTERM)
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signal.signal(signal.SIGTERM, _sigterm)
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# Block SIGINT and let the parent send us a SIGTERM
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signal.signal(signal.SIGINT, signal.SIG_IGN)
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# Reopen the eventlet hub to make sure we don't share an epoll
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# fd with parent and/or siblings, which would be bad
|
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eventlet.hubs.use_hub()
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# Close write to ensure only parent has it open
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os.close(self.writepipe)
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# Create greenthread to watch for parent to close pipe
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eventlet.spawn_n(self._pipe_watcher)
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# Reseed random number generator
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random.seed()
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launcher = Launcher()
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launcher.run_service(service)
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|
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def _start_child(self, wrap):
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if len(wrap.forktimes) > wrap.workers:
|
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# Limit ourselves to one process a second (over the period of
|
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# number of workers * 1 second). This will allow workers to
|
||||
# start up quickly but ensure we don't fork off children that
|
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# die instantly too quickly.
|
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if time.time() - wrap.forktimes[0] < wrap.workers:
|
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LOG.info(_('Forking too fast, sleeping'))
|
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time.sleep(1)
|
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|
||||
wrap.forktimes.pop(0)
|
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|
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wrap.forktimes.append(time.time())
|
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|
||||
pid = os.fork()
|
||||
if pid == 0:
|
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# NOTE(johannes): All exceptions are caught to ensure this
|
||||
# doesn't fallback into the loop spawning children. It would
|
||||
# be bad for a child to spawn more children.
|
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status = 0
|
||||
try:
|
||||
self._child_process(wrap.service)
|
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except SignalExit as exc:
|
||||
signame = {signal.SIGTERM: 'SIGTERM',
|
||||
signal.SIGINT: 'SIGINT'}[exc.signo]
|
||||
LOG.info(_('Caught %s, exiting'), signame)
|
||||
status = exc.code
|
||||
except SystemExit as exc:
|
||||
status = exc.code
|
||||
except BaseException:
|
||||
LOG.exception(_('Unhandled exception'))
|
||||
status = 2
|
||||
finally:
|
||||
wrap.service.stop()
|
||||
|
||||
os._exit(status)
|
||||
|
||||
LOG.info(_('Started child %d'), pid)
|
||||
|
||||
wrap.children.add(pid)
|
||||
self.children[pid] = wrap
|
||||
|
||||
return pid
|
||||
|
||||
def launch_service(self, service, workers=1):
|
||||
wrap = ServiceWrapper(service, workers)
|
||||
|
||||
LOG.info(_('Starting %d workers'), wrap.workers)
|
||||
while self.running and len(wrap.children) < wrap.workers:
|
||||
self._start_child(wrap)
|
||||
|
||||
def _wait_child(self):
|
||||
try:
|
||||
# Don't block if no child processes have exited
|
||||
pid, status = os.waitpid(0, os.WNOHANG)
|
||||
if not pid:
|
||||
return None
|
||||
except OSError as exc:
|
||||
if exc.errno not in (errno.EINTR, errno.ECHILD):
|
||||
raise
|
||||
return None
|
||||
|
||||
if os.WIFSIGNALED(status):
|
||||
sig = os.WTERMSIG(status)
|
||||
LOG.info(_('Child %(pid)d killed by signal %(sig)d'),
|
||||
dict(pid=pid, sig=sig))
|
||||
else:
|
||||
code = os.WEXITSTATUS(status)
|
||||
LOG.info(_('Child %(pid)s exited with status %(code)d'),
|
||||
dict(pid=pid, code=code))
|
||||
|
||||
if pid not in self.children:
|
||||
LOG.warning(_('pid %d not in child list'), pid)
|
||||
return None
|
||||
|
||||
wrap = self.children.pop(pid)
|
||||
wrap.children.remove(pid)
|
||||
return wrap
|
||||
|
||||
def wait(self):
|
||||
"""Loop waiting on children to die and respawning as necessary"""
|
||||
|
||||
LOG.debug(_('Full set of CONF:'))
|
||||
CONF.log_opt_values(LOG, std_logging.DEBUG)
|
||||
|
||||
while self.running:
|
||||
wrap = self._wait_child()
|
||||
if not wrap:
|
||||
# Yield to other threads if no children have exited
|
||||
# Sleep for a short time to avoid excessive CPU usage
|
||||
# (see bug #1095346)
|
||||
eventlet.greenthread.sleep(.01)
|
||||
continue
|
||||
|
||||
while self.running and len(wrap.children) < wrap.workers:
|
||||
self._start_child(wrap)
|
||||
|
||||
if self.sigcaught:
|
||||
signame = {signal.SIGTERM: 'SIGTERM',
|
||||
signal.SIGINT: 'SIGINT'}[self.sigcaught]
|
||||
LOG.info(_('Caught %s, stopping children'), signame)
|
||||
|
||||
for pid in self.children:
|
||||
try:
|
||||
os.kill(pid, signal.SIGTERM)
|
||||
except OSError as exc:
|
||||
if exc.errno != errno.ESRCH:
|
||||
raise
|
||||
|
||||
# Wait for children to die
|
||||
if self.children:
|
||||
LOG.info(_('Waiting on %d children to exit'), len(self.children))
|
||||
while self.children:
|
||||
self._wait_child()
|
||||
|
||||
|
||||
class Service(object):
|
||||
"""Service object for binaries running on hosts."""
|
||||
|
||||
def __init__(self, threads=1000):
|
||||
self.tg = threadgroup.ThreadGroup(threads)
|
||||
|
||||
def start(self):
|
||||
pass
|
||||
|
||||
def stop(self):
|
||||
self.tg.stop()
|
||||
|
||||
def wait(self):
|
||||
self.tg.wait()
|
||||
|
||||
|
||||
def launch(service, workers=None):
|
||||
if workers:
|
||||
launcher = ProcessLauncher()
|
||||
launcher.launch_service(service, workers=workers)
|
||||
else:
|
||||
launcher = ServiceLauncher()
|
||||
launcher.launch_service(service)
|
||||
return launcher
|
||||
@ -1,114 +0,0 @@
|
||||
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
||||
|
||||
# Copyright 2012 Red Hat, Inc.
|
||||
#
|
||||
# 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 eventlet import greenlet
|
||||
from eventlet import greenpool
|
||||
from eventlet import greenthread
|
||||
|
||||
from glance.openstack.common import log as logging
|
||||
from glance.openstack.common import loopingcall
|
||||
|
||||
|
||||
LOG = logging.getLogger(__name__)
|
||||
|
||||
|
||||
def _thread_done(gt, *args, **kwargs):
|
||||
""" Callback function to be passed to GreenThread.link() when we spawn()
|
||||
Calls the :class:`ThreadGroup` to notify if.
|
||||
|
||||
"""
|
||||
kwargs['group'].thread_done(kwargs['thread'])
|
||||
|
||||
|
||||
class Thread(object):
|
||||
""" Wrapper around a greenthread, that holds a reference to the
|
||||
:class:`ThreadGroup`. The Thread will notify the :class:`ThreadGroup` when
|
||||
it has done so it can be removed from the threads list.
|
||||
"""
|
||||
def __init__(self, thread, group):
|
||||
self.thread = thread
|
||||
self.thread.link(_thread_done, group=group, thread=self)
|
||||
|
||||
def stop(self):
|
||||
self.thread.kill()
|
||||
|
||||
def wait(self):
|
||||
return self.thread.wait()
|
||||
|
||||
|
||||
class ThreadGroup(object):
|
||||
""" The point of the ThreadGroup classis to:
|
||||
|
||||
* keep track of timers and greenthreads (making it easier to stop them
|
||||
when need be).
|
||||
* provide an easy API to add timers.
|
||||
"""
|
||||
def __init__(self, thread_pool_size=10):
|
||||
self.pool = greenpool.GreenPool(thread_pool_size)
|
||||
self.threads = []
|
||||
self.timers = []
|
||||
|
||||
def add_timer(self, interval, callback, initial_delay=None,
|
||||
*args, **kwargs):
|
||||
pulse = loopingcall.FixedIntervalLoopingCall(callback, *args, **kwargs)
|
||||
pulse.start(interval=interval,
|
||||
initial_delay=initial_delay)
|
||||
self.timers.append(pulse)
|
||||
|
||||
def add_thread(self, callback, *args, **kwargs):
|
||||
gt = self.pool.spawn(callback, *args, **kwargs)
|
||||
th = Thread(gt, self)
|
||||
self.threads.append(th)
|
||||
|
||||
def thread_done(self, thread):
|
||||
self.threads.remove(thread)
|
||||
|
||||
def stop(self):
|
||||
current = greenthread.getcurrent()
|
||||
for x in self.threads:
|
||||
if x is current:
|
||||
# don't kill the current thread.
|
||||
continue
|
||||
try:
|
||||
x.stop()
|
||||
except Exception as ex:
|
||||
LOG.exception(ex)
|
||||
|
||||
for x in self.timers:
|
||||
try:
|
||||
x.stop()
|
||||
except Exception as ex:
|
||||
LOG.exception(ex)
|
||||
self.timers = []
|
||||
|
||||
def wait(self):
|
||||
for x in self.timers:
|
||||
try:
|
||||
x.wait()
|
||||
except greenlet.GreenletExit:
|
||||
pass
|
||||
except Exception as ex:
|
||||
LOG.exception(ex)
|
||||
current = greenthread.getcurrent()
|
||||
for x in self.threads:
|
||||
if x is current:
|
||||
continue
|
||||
try:
|
||||
x.wait()
|
||||
except greenlet.GreenletExit:
|
||||
pass
|
||||
except Exception as ex:
|
||||
LOG.exception(ex)
|
||||
@ -1,8 +1,9 @@
|
||||
[DEFAULT]
|
||||
|
||||
# The list of modules to copy from openstack-common
|
||||
# The list of modules to copy from oslo-incubator
|
||||
module=db
|
||||
module=db.sqlalchemy
|
||||
module=excutils
|
||||
module=fileutils
|
||||
module=gettextutils
|
||||
module=importutils
|
||||
@ -13,6 +14,7 @@ module=lockutils
|
||||
module=log
|
||||
module=network_utils
|
||||
module=policy
|
||||
module=processutils
|
||||
module=strutils
|
||||
module=test
|
||||
module=timeutils
|
||||
|
||||
Loading…
Reference in New Issue
Block a user