4576ca73ea
Due to the limit of Python interpreter, API service of Cinder can't really utilize underlying multi-core architecture even libraries like eventlet has been used. To make API service much more scalable, we'd adopt multi-process (worker) mode that has been used for long in Glance/Swift/Nova. The default behavior isn't changed with this patch, Cinder API service will still run in one process (default value of osapi_volume_workers is None). Implementation wise, a good portion of cinder/service.py has been removed because those content has been merged in Oslo version of service module. cinder/wsgi.py is also updated to adopt the change for multiple WSGI servers running in separate processes. Implement bp: multi-process-api-service DocImpact: 'New config option osapi_volume_workers is used to specify number of API service workers (OS processes) to launch for Cinder API service. Setting this config option to a proper value (e.g. osapi_volume_workers = # of CPU cores/threads of the machine) can greatly improve the total throughput of API service [# of API requests can be handled per second].' Also removed out-dated comments in bin/cinder-api due to the fact that this bug [1] has been fixed in eventlet 0.9.13 [1] https://bitbucket.org/eventlet/eventlet/issue/92/eventletgreen-override-of-oswaitpid Change-Id: I8361d0dc0d43040e48634ff1aee1324e5e0af466
79 lines
2.5 KiB
Python
Executable File
79 lines
2.5 KiB
Python
Executable File
#!/usr/bin/env python
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# Copyright 2011 OpenStack, LLC
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# Copyright 2010 United States Government as represented by the
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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");
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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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"""Starter script for All cinder services.
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This script attempts to start all the cinder services in one process. Each
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service is started in its own greenthread. Please note that exceptions and
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sys.exit() on the starting of a service are logged and the script will
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continue attempting to launch the rest of the services.
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"""
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import eventlet
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eventlet.monkey_patch()
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import os
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import sys
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from oslo.config import cfg
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possible_topdir = os.path.normpath(os.path.join(os.path.abspath(sys.argv[0]),
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os.pardir,
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os.pardir))
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if os.path.exists(os.path.join(possible_topdir, "cinder", "__init__.py")):
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sys.path.insert(0, possible_topdir)
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from cinder.openstack.common import gettextutils
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gettextutils.install('cinder', lazy=False)
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# Need to register global_opts
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from cinder.common import config # noqa
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from cinder.openstack.common import log as logging
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from cinder import service
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from cinder import utils
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from cinder import version
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CONF = cfg.CONF
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if __name__ == '__main__':
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CONF(sys.argv[1:], project='cinder',
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version=version.version_string())
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logging.setup("cinder")
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LOG = logging.getLogger('cinder.all')
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utils.monkey_patch()
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launcher = service.process_launcher()
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# cinder-api
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try:
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server = service.WSGIService('osapi_volume')
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launcher.launch_service(server, workers=server.workers or 1)
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except (Exception, SystemExit):
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LOG.exception(_('Failed to load osapi_volume'))
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for binary in ['cinder-volume', 'cinder-scheduler', 'cinder-backup']:
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try:
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launcher.launch_service(service.Service.create(binary=binary))
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except (Exception, SystemExit):
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LOG.exception(_('Failed to load %s'), binary)
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launcher.wait()
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