ecc8de8d6c
* Add osprofiler wsgi middleware. This middleware is used for 2 things:
1) It checks that person who want to trace is trusted and knows
secret HMAC key.
2) It starts tracing in case of proper trace headers
and adds the first wsgi trace point with info about the HTTP request
* Add initialization of osprofiler on start of a service
Currently that includes oslo.messaging notifier instance creation
to send Ceilometer backend notifications.
oslo-spec: https://review.openstack.org/#/c/103825/
python-novaclient change: https://review.openstack.org/#/c/254699/
based on: https://review.openstack.org/#/c/105096/
Co-Authored-By: Boris Pavlovic <boris@pavlovic.me>
Co-Authored-By: Munoz, Obed N <obed.n.munoz@intel.com>
Co-Authored-By: Roman Podoliaka <rpodolyaka@mirantis.com>
Co-Authored-By: Tovin Seven <vinhnt@vn.fujitsu.com>
Implements: blueprint osprofiler-support-in-nova
Change-Id: I82d2badc8c1fcec27c3fce7c3c20e0f3b76414f1
74 lines
2.3 KiB
Python
74 lines
2.3 KiB
Python
# Copyright 2016 IBM Corporation.
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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 oslo_utils import importutils
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import webob.dec
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import nova.conf
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profiler = importutils.try_import('osprofiler.profiler')
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profiler_web = importutils.try_import('osprofiler.web')
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CONF = nova.conf.CONF
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class WsgiMiddleware(object):
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def __init__(self, application, **kwargs):
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self.application = application
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@classmethod
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def factory(cls, global_conf, **local_conf):
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if profiler_web:
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return profiler_web.WsgiMiddleware.factory(global_conf,
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**local_conf)
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def filter_(app):
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return cls(app, **local_conf)
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return filter_
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@webob.dec.wsgify
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def __call__(self, request):
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return request.get_response(self.application)
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def get_traced_meta():
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if profiler and 'profiler' in CONF and CONF.profiler.enabled:
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return profiler.TracedMeta
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else:
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# NOTE(rpodolyaka): if we do not return a child of type, then Python
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# fails to build a correct MRO when osprofiler is not installed
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class NoopMeta(type):
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pass
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return NoopMeta
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def trace_cls(name, **kwargs):
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"""Wrap the OSProfiler trace_cls decorator so that it will not try to
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patch the class unless OSProfiler is present and enabled in the config
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:param name: The name of action. E.g. wsgi, rpc, db, etc..
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:param kwargs: Any other keyword args used by profiler.trace_cls
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"""
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def decorator(cls):
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if profiler and 'profiler' in CONF and CONF.profiler.enabled:
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trace_decorator = profiler.trace_cls(name, kwargs)
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return trace_decorator(cls)
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return cls
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return decorator
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