f2028ab194
This provides a FLAG to turn on Eventlet's builtin backdoor server which allows you to connect over telnet and receive a Python prompt (which is immensely helpful for debugging running systems). Fixes bug 1000366 Change-Id: I779247a0796d34ba2a5478436d85b30ba76c4a01
70 lines
1.9 KiB
Python
70 lines
1.9 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (c) 2012 Openstack, LLC.
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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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import gc
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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 nova import flags
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from nova.openstack.common 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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FLAGS = flags.FLAGS
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FLAGS.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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backdoor_locals = {
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'_': None, # So it doesn't interfere with the global
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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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}
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def initialize_if_enabled():
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if FLAGS.backdoor_port is None:
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return
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eventlet.spawn(eventlet.backdoor.backdoor_server,
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eventlet.listen(('localhost', FLAGS.backdoor_port)),
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locals=backdoor_locals)
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