Merge "Enable OSProfiler support in Ironic"

This commit is contained in:
Jenkins 2017-08-02 16:26:57 +00:00 committed by Gerrit Code Review
commit f15934eb8d
17 changed files with 2298 additions and 3 deletions

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@ -709,6 +709,16 @@ For more information about the supported parameters see::
Always be careful when running debuggers in time sensitive code,
they may cause timeout errors that weren't there before.
OSProfiler Tracing in Ironic
============================
OSProfiler is an OpenStack cross-project profiling library. It is being
used among OpenStack projects to look at performance issues and detect
bottlenecks. For details on how OSProfiler works and how to use it in ironic,
please refer to `OSProfiler Support Documentation <osprofiler-support>`_.
Building developer documentation
================================

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@ -25,6 +25,7 @@ primarily for developers.
Ironic System Architecture <architecture>
Provisioning State Machine <states>
Developing New Notifications <notifications>
OSProfiler Tracing <osprofiler-support>
These pages contain information for PTLs, cross-project liaisons, and core
reviewers.

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@ -0,0 +1,120 @@
.. _OSProfiler-support:
================
About OSProfiler
================
OSProfiler is an OpenStack cross-project profiling library. Its API
provides different ways to add a new trace point. Trace points contain
two messages (start and stop). Messages like below are sent to a collector::
{
"name": <point_name>-(start|stop),
"base_id": <uuid>,
"parent_id": <uuid>,
"trace_id": <uuid>,
"info": <dict>
}
The fields are defined as follows:
``base_id`` - <uuid> that is same for all trace points that belong to
one trace. This is used to simplify the process of retrieving all
trace points (related to one trace) from the collector.
``parent_id`` - <uuid> of parent trace point.
``trace_id`` - <uuid> of current trace point.
``info`` - the dictionary that contains user information passed when
calling profiler start() & stop() methods.
The profiler uses ceilometer as a centralized collector. Two other
alternatives for ceilometer are pure MongoDB driver and Elasticsearch.
A notifier is setup to send notifications to ceilometer using oslo.messaging
and ceilometer API is used to retrieve all messages related to one trace.
OSProfiler has entry point that allows the user to retrieve information
about traces and present it in HTML/JSON using CLI.
For more details see `OSProfiler Cross-project profiling library`_.
How to Use OSProfiler with Ironic in Devstack
=============================================
To use or test OSProfiler in ironic, the user needs to setup Devstack
with OSProfiler and ceilometer. In addition to the setup described at
`Deploying Ironic with DevStack`_, the user needs to do the following:
Add the following to ``localrc`` to enable OSProfiler and ceilometer::
enable_plugin panko https://git.openstack.org/openstack/panko
enable_plugin ceilometer https://git.openstack.org/openstack/ceilometer
enable_plugin osprofiler https://git.openstack.org/openstack/osprofiler
# Enable the following services
CEILOMETER_NOTIFICATION_TOPICS=notifications,profiler
ENABLED_SERVICES+=,ceilometer-acompute,ceilometer-acentral
ENABLED_SERVICES+=,ceilometer-anotification,ceilometer-collector
ENABLED_SERVICES+=,ceilometer-alarm-evaluator,ceilometer-alarm-notifier
ENABLED_SERVICES+=,ceilometer-api
Run stack.sh.
Once Devstack environment is setup, edit ``ironic.conf`` to set the following
profiler options and restart ironic services::
[profiler]
enabled = True
hmac_keys = SECRET_KEY # default value used across several OpenStack projects
In order to trace ironic using OSProfiler, use openstackclient to run
baremetal commands with
``--os-profile SECRET_KEY``
For example, the following will cause a <trace-id> to be printed after node list:
``$ openstack --os-profile SECRET_KEY baremetal node list``
Output of the above command will include the following::
Trace ID: <trace-id>
Display trace with command:
osprofiler trace show --html <trace-id>
The trace results can be seen using this command::
$ osprofiler trace show --html <trace-id>
The trace results can be saved in a file with ``--out file-name`` option::
$ osprofiler trace show --html <trace-id> --out trace.html
Sample Trace:
.. figure:: ../images/sample_trace.svg
:width: 660px
:align: left
:alt: Sample Trace
.. figure:: ../images/sample_trace_details.svg
:width: 660px
:align: left
:alt: Sample Trace Details
References
==========
- `OSProfiler Cross-project profiling library`_
- `Deploying Ironic with DevStack`_
.. _OSProfiler Cross-project profiling library: http://docs.openstack.org/osprofiler/latest/index.html
.. _Deploying Ironic with DevStack: http://docs.openstack.org/ironic/latest/contributor/dev-quickstart.html#deploying-ironic-with-devstack

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@ -3316,6 +3316,84 @@
#policy_dirs = policy.d
[profiler]
#
# From osprofiler
#
#
# Enables the profiling for all services on this node. Default
# value is False
# (fully disable the profiling feature).
#
# Possible values:
#
# * True: Enables the feature
# * False: Disables the feature. The profiling cannot be
# started via this project
# operations. If the profiling is triggered by another
# project, this project part
# will be empty.
# (boolean value)
# Deprecated group/name - [profiler]/profiler_enabled
#enabled = false
#
# Enables SQL requests profiling in services. Default value is
# False (SQL
# requests won't be traced).
#
# Possible values:
#
# * True: Enables SQL requests profiling. Each SQL query will
# be part of the
# trace and can the be analyzed by how much time was spent for
# that.
# * False: Disables SQL requests profiling. The spent time is
# only shown on a
# higher level of operations. Single SQL queries cannot be
# analyzed this
# way.
# (boolean value)
#trace_sqlalchemy = false
#
# Secret key(s) to use for encrypting context data for
# performance profiling.
# This string value should have the following format:
# <key1>[,<key2>,...<keyn>],
# where each key is some random string. A user who triggers
# the profiling via
# the REST API has to set one of these keys in the headers of
# the REST API call
# to include profiling results of this node for this
# particular project.
#
# Both "enabled" flag and "hmac_keys" config options should be
# set to enable
# profiling. Also, to generate correct profiling information
# across all services
# at least one key needs to be consistent between OpenStack
# projects. This
# ensures it can be used from client side to generate the
# trace, containing
# information from all possible resources. (string value)
#hmac_keys = SECRET_KEY
#
# Connection string for a notifier backend. Default value is
# messaging:// which
# sets the notifier to oslo_messaging.
#
# Examples of possible values:
#
# * messaging://: use oslo_messaging driver for sending
# notifications.
# (string value)
#connection_string = messaging://
[pxe]
#

View File

@ -18,6 +18,7 @@
import keystonemiddleware.audit as audit_middleware
from oslo_config import cfg
import oslo_middleware.cors as cors_middleware
import osprofiler.web as osprofiler_web
import pecan
from ironic.api import config
@ -93,6 +94,9 @@ def setup_app(pecan_config=None, extra_hooks=None):
app, dict(cfg.CONF),
public_api_routes=pecan_config.app.acl_public_routes)
if CONF.profiler.enabled:
app = osprofiler_web.WsgiMiddleware(app)
# Create a CORS wrapper, and attach ironic-specific defaults that must be
# included in all CORS responses.
app = IronicCORS(app, CONF)

View File

@ -22,6 +22,7 @@ import sys
from oslo_config import cfg
from oslo_reports import guru_meditation_report as gmr
from ironic.common import profiler
from ironic.common import service as ironic_service
from ironic.common import wsgi_service
from ironic.objects import base
@ -41,6 +42,8 @@ def main():
base.IronicObject.indirection_api = (
indirection.IronicObjectIndirectionAPI())
profiler.setup('ironic_api', CONF.host)
# Build and start the WSGI app
launcher = ironic_service.process_launcher()
server = wsgi_service.WSGIService('ironic_api', CONF.api.enable_ssl_api)

View File

@ -26,6 +26,7 @@ from oslo_log import log
from oslo_reports import guru_meditation_report as gmr
from oslo_service import service
from ironic.common import profiler as profiler
from ironic.common import rpc_service
from ironic.common import service as ironic_service
from ironic import version
@ -78,6 +79,8 @@ def main():
issue_startup_warnings(CONF)
profiler.setup('ironic_conductor', CONF.host)
launcher = service.launch(CONF, mgr)
launcher.wait()

View File

@ -16,6 +16,7 @@
# under the License.
from oslo_config import cfg
import osprofiler.opts as profiler_opts
from ironic.common import rpc
from ironic import version
@ -28,3 +29,4 @@ def parse_args(argv, default_config_files=None):
version=version.version_info.release_string(),
default_config_files=default_config_files)
rpc.init(cfg.CONF)
profiler_opts.set_defaults(cfg.CONF)

62
ironic/common/profiler.py Normal file
View File

@ -0,0 +1,62 @@
# 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 oslo_config import cfg
from oslo_log import log as logging
from osprofiler import initializer
from osprofiler import profiler
from ironic.common import context
CONF = cfg.CONF
LOG = logging.getLogger(__name__)
def setup(name, host='0.0.0.0'):
"""Setup OSprofiler notifier and enable profiling.
:param name: name of the service that will be profiled
:param host: hostname or host IP address that the service will be
running on. By default host will be set to 0.0.0.0, but
specifying host name / address usage is highly recommended.
:raises TypeError: in case of invalid connection string for
a notifier backend, which is set in
osprofiler.initializer.init_from_conf.
"""
if CONF.profiler.enabled:
admin_context = context.get_admin_context()
initializer.init_from_conf(conf=CONF,
context=admin_context.to_dict(),
project="ironic",
service=name,
host=host)
LOG.info("OSProfiler is enabled. Trace is generated using "
"[profiler]/hmac_keys specified in ironic.conf. "
"To disable, set [profiler]/enabled=false")
def trace_cls(name, **kwargs):
"""Wrap the OSProfiler trace_cls decorator
Wrap the OSProfiler trace_cls decorator so that it will not try to
patch the class unless OSProfiler is present and enabled in the config
:param name: The name of action. For example, wsgi, rpc, db, etc..
:param kwargs: Any other keyword args used by profiler.trace_cls
"""
def decorator(cls):
if profiler and 'profiler' in CONF and CONF.profiler.enabled:
trace_decorator = profiler.trace_cls(name, kwargs)
return trace_decorator(cls)
return cls
return decorator

View File

@ -16,6 +16,7 @@
from oslo_config import cfg
import oslo_messaging as messaging
from oslo_messaging.rpc import dispatcher
from osprofiler import profiler
from ironic.common import context as ironic_context
from ironic.common import exception
@ -95,9 +96,21 @@ class RequestContextSerializer(messaging.Serializer):
return self._base.deserialize_entity(context, entity)
def serialize_context(self, context):
return context.to_dict()
_context = context.to_dict()
prof = profiler.get()
if prof:
trace_info = {
"hmac_key": prof.hmac_key,
"base_id": prof.get_base_id(),
"parent_id": prof.get_id()
}
_context.update({"trace_info": trace_info})
return _context
def deserialize_context(self, context):
trace_info = context.pop("trace_info", None)
if trace_info:
profiler.init(**trace_info)
return ironic_context.RequestContext.from_dict(context)

View File

@ -29,12 +29,15 @@ from oslo_utils import netutils
from oslo_utils import strutils
from oslo_utils import timeutils
from oslo_utils import uuidutils
from osprofiler import sqlalchemy as osp_sqlalchemy
import sqlalchemy as sa
from sqlalchemy.orm.exc import NoResultFound, MultipleResultsFound
from sqlalchemy.orm import joinedload
from sqlalchemy import sql
from ironic.common import exception
from ironic.common.i18n import _
from ironic.common import profiler
from ironic.common import states
from ironic.conf import CONF
from ironic.db import api
@ -53,14 +56,20 @@ def get_backend():
def _session_for_read():
return enginefacade.reader.using(_CONTEXT)
return _wrap_session(enginefacade.reader.using(_CONTEXT))
# Please add @oslo_db_api.retry_on_deadlock decorator to all methods using
# _session_for_write (as deadlocks happen on write), so that oslo_db is able
# to retry in case of deadlocks.
def _session_for_write():
return enginefacade.writer.using(_CONTEXT)
return _wrap_session(enginefacade.writer.using(_CONTEXT))
def _wrap_session(session):
if CONF.profiler.enabled and CONF.profiler.trace_sqlalchemy:
session = osp_sqlalchemy.wrap_session(sa, session)
return session
def _get_node_query_with_tags():
@ -191,6 +200,7 @@ def _filter_active_conductors(query, interval=None):
return query
@profiler.trace_cls("db_api")
class Connection(api.Connection):
"""SqlAlchemy connection."""

View File

@ -0,0 +1,43 @@
# 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 mock
from oslo_config import cfg
from osprofiler import web
from ironic.tests.unit.api import base
CONF = cfg.CONF
class TestOsprofilerWsgiMiddleware(base.BaseApiTest):
"""Provide a basic test for OSProfiler wsgi middleware.
The tests below provide minimal confirmation that the OSProfiler wsgi
middleware is called.
"""
def setUp(self):
super(TestOsprofilerWsgiMiddleware, self).setUp()
@mock.patch.object(web, 'WsgiMiddleware')
def test_enable_osp_wsgi_request(self, mock_ospmiddleware):
CONF.profiler.enabled = True
self._make_app()
mock_ospmiddleware.assert_called_once_with(mock.ANY)
@mock.patch.object(web, 'WsgiMiddleware')
def test_disable_osp_wsgi_request(self, mock_ospmiddleware):
CONF.profiler.enabled = False
self._make_app()
self.assertFalse(mock_ospmiddleware.called)

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@ -0,0 +1,17 @@
---
features:
- |
Adds OSProfiler support. This cross-project profiling library
provides the ability to trace various OpenStack requests through all
OpenStack services that support it. To initiate OpenStack request tracing,
`--profile <HMAC_KEY>` option needs to be added to the CLI command.
As part of the output, there will be a message with <trace_id>.
To see the HTML graphs, the following command should be used -
`$ osprofiler trace show <trace_id> --html --out result.html`. See
OSProfiler documentation: http://docs.openstack.org/developer/osprofiler/.
security:
- OSProfiler support requires passing of trace information between
various OpenStack services. This information is securely signed
by one of HMAC keys, defined in ironic.conf configuration file.
To allow cross-project tracing, user should use the key that is
common among all OpenStack services he or she wants to trace.

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@ -30,6 +30,7 @@ oslo.reports>=0.6.0 # Apache-2.0
oslo.serialization!=2.19.1,>=1.10.0 # Apache-2.0
oslo.service>=1.10.0 # Apache-2.0
oslo.utils>=3.20.0 # Apache-2.0
osprofiler>=1.4.0 # Apache-2.0
pecan!=1.0.2,!=1.0.3,!=1.0.4,!=1.2,>=1.0.0 # BSD
requests>=2.14.2 # Apache-2.0
rfc3986>=0.3.1 # Apache-2.0

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@ -16,4 +16,5 @@ namespace = oslo.log
namespace = oslo.service.service
namespace = oslo.service.periodic_task
namespace = oslo.service.sslutils
namespace = osprofiler
namespace = keystonemiddleware.auth_token