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author | Angus Salkeld <asalkeld@redhat.com> | 2012-08-02 08:15:09 +1000 |
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committer | Angus Salkeld <asalkeld@redhat.com> | 2012-08-02 08:15:09 +1000 |
commit | 4a4f82e83f74f04301eb71cf8cc591315c481fc5 (patch) | |
tree | 4b2bdaa0047d1c9dfbb55938576f50ff7839b2f0 /openstack | |
parent | 079927a6d8953377d1923269213cdbdadc3633c1 (diff) | |
download | oslo-4a4f82e83f74f04301eb71cf8cc591315c481fc5.tar.gz oslo-4a4f82e83f74f04301eb71cf8cc591315c481fc5.tar.xz oslo-4a4f82e83f74f04301eb71cf8cc591315c481fc5.zip |
Copy eventlet_backdoor into common from nova.
This is debugging utility only used by service.py in nova.
(needed in openstack-common to move service.py to common)
Change-Id: I9a7a84a5f34517abf91d87e9d817d7e763e22829
Signed-off-by: Angus Salkeld <asalkeld@redhat.com>
Diffstat (limited to 'openstack')
-rw-r--r-- | openstack/common/eventlet_backdoor.py | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/openstack/common/eventlet_backdoor.py b/openstack/common/eventlet_backdoor.py new file mode 100644 index 0000000..9f1404a --- /dev/null +++ b/openstack/common/eventlet_backdoor.py @@ -0,0 +1,78 @@ +# vim: tabstop=4 shiftwidth=4 softtabstop=4 + +# Copyright (c) 2012 Openstack, LLC. +# 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. + +import gc +import pprint +import sys +import traceback + +import eventlet +import eventlet.backdoor +import greenlet + +from openstack.common import cfg + +eventlet_backdoor_opts = [ + cfg.IntOpt('backdoor_port', + default=None, + help='port for eventlet backdoor to listen') + ] + +CONF = cfg.CONF +CONF.register_opts(eventlet_backdoor_opts) + + +def _dont_use_this(): + print "Don't use this, just disconnect instead" + + +def _find_objects(t): + return filter(lambda o: isinstance(o, t), gc.get_objects()) + + +def _print_greenthreads(): + for i, gt in enumerate(find_objects(greenlet.greenlet)): + print i, gt + traceback.print_stack(gt.gr_frame) + print + + +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, + } + + if CONF.backdoor_port is None: + return + + # 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 + + eventlet.spawn(eventlet.backdoor.backdoor_server, + eventlet.listen(('localhost', CONF.backdoor_port)), + locals=backdoor_locals) |