Tovin Seven
32d088b2c1
* Add osprofiler wsgi middleware. This middleware is used for 2 things:
1) It checks that person who wants to trace is trusted and knows
secret HMAC key.
2) It starts tracing in case of proper trace headers
and adds first wsgi trace point, with info about HTTP request
* Add initialization of osprofiler at start of service
Currently that includes oslo.messaging notifer instance creation
to send Ceilometer backend notifications.
* Traces HTTP/RPC/DB API calls
Demo: https://hieulq.github.io/cluster-create-false-new-html.html
Co-Authored-By: Hieu LE <hieulq@vn.fujitsu.com>
Implements: blueprint osprofiler-support-in-magnum
Change-Id: I7d68995aab81d365433950aada078ef1fcd5469b
70 lines
3.1 KiB
Python
70 lines
3.1 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import oslo_messaging as messaging
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from magnum.common import profiler
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from magnum.objects import base
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@profiler.trace_cls("rpc")
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class Handler(object):
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"Indirection API callbacks"
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def _object_dispatch(self, target, method, context, args, kwargs):
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"""Dispatch a call to an object method.
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This ensures that object methods get called and any exception
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that is raised gets wrapped in an ExpectedException for forwarding
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back to the caller (without spamming the conductor logs).
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"""
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try:
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# NOTE(danms): Keep the getattr inside the try block since
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# a missing method is really a client problem
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return getattr(target, method)(context, *args, **kwargs)
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except Exception:
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raise messaging.ExpectedException()
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def object_class_action(self, context, objname, objmethod,
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objver, args, kwargs):
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"""Perform a classmethod action on an object."""
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objclass = base.MagnumObject.obj_class_from_name(objname, objver)
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result = self._object_dispatch(objclass, objmethod, context,
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args, kwargs)
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# NOTE(danms): The RPC layer will convert to primitives for us,
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# but in this case, we need to honor the version the client is
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# asking for, so we do it before returning here.
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return (result.obj_to_primitive(target_version=objver)
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if isinstance(result, base.MagnumObject) else result)
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def object_action(self, context, objinst, objmethod, args, kwargs):
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"""Perform an action on an object."""
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old_objinst = objinst.obj_clone()
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result = self._object_dispatch(objinst, objmethod, context,
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args, kwargs)
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updates = dict()
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# NOTE(danms): Diff the object with the one passed to us and
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# generate a list of changes to forward back
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for name, field in objinst.fields.items():
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if not objinst.obj_attr_is_set(name):
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# Avoid demand-loading anything
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continue
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if (not old_objinst.obj_attr_is_set(name) or
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getattr(old_objinst, name) != getattr(objinst, name)):
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updates[name] = field.to_primitive(objinst, name,
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getattr(objinst, name))
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updates['obj_what_changed'] = objinst.obj_what_changed()
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return updates, result
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def object_backport(self, context, objinst, target_version):
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return objinst.obj_to_primitive(target_version=target_version)
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