Sean Mooney
73fe84fa0e
Unlike uwsgi, apache mod_wsgi does not support passing commandline arguments to the python wsgi script it invokes. As a result while you can pass --config-file when hosting the api and metadata wsgi applications with uwsgi there is no way to use multiple config files with mod_wsgi. This change mirrors how this is supported in keystone today by intoducing a new OS_NOVA_CONFIG_FILES env var to allow operators to optional pass a ';' delimited list of config files to load. This change also add docs for this env var and the existing undocumented OS_NOVA_CONFIG_DIR. Closes-Bug: 1994056 Change-Id: I8e3ccd75cbb7f2e132b403cb38022787c2c0a37b
142 lines
4.8 KiB
Python
142 lines
4.8 KiB
Python
# 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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"""WSGI application initialization for Nova APIs."""
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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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from oslo_log import log as logging
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from oslo_reports import guru_meditation_report as gmr
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from oslo_reports import opts as gmr_opts
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from oslo_service import _options as service_opts
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from paste import deploy
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from nova import config
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from nova import context
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from nova import exception
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from nova import objects
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from nova import service
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from nova import utils
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from nova import version
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CONF = cfg.CONF
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CONFIG_FILES = ['api-paste.ini', 'nova.conf']
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LOG = logging.getLogger(__name__)
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objects.register_all()
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def _get_config_files(env=None):
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if env is None:
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env = os.environ
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dirname = env.get('OS_NOVA_CONFIG_DIR', '/etc/nova').strip()
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files = env.get('OS_NOVA_CONFIG_FILES', '').split(';')
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if files == ['']:
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files = CONFIG_FILES
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return [os.path.join(dirname, config_file)
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for config_file in files]
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def _setup_service(host, name):
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try:
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utils.raise_if_old_compute()
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except exception.TooOldComputeService as e:
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if CONF.workarounds.disable_compute_service_check_for_ffu:
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LOG.warning(str(e))
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else:
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raise
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binary = name if name.startswith('nova-') else "nova-%s" % name
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ctxt = context.get_admin_context()
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service_ref = objects.Service.get_by_host_and_binary(
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ctxt, host, binary)
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if service_ref:
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service._update_service_ref(service_ref)
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else:
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try:
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service_obj = objects.Service(ctxt)
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service_obj.host = host
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service_obj.binary = binary
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service_obj.topic = None
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service_obj.report_count = 0
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service_obj.create()
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except (exception.ServiceTopicExists,
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exception.ServiceBinaryExists):
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# If we race to create a record with a sibling, don't
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# fail here.
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pass
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def error_application(exc, name):
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# TODO(cdent): make this something other than a stub
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def application(environ, start_response):
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start_response('500 Internal Server Error', [
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('Content-Type', 'text/plain; charset=UTF-8')])
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return ['Out of date %s service %s\n' % (name, exc)]
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return application
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@utils.run_once('Global data already initialized, not re-initializing.',
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LOG.info)
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def init_global_data(conf_files, service_name):
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# NOTE(melwitt): parse_args initializes logging and calls global rpc.init()
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# and db_api.configure(). The db_api.configure() call does not initiate any
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# connection to the database.
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# NOTE(gibi): sys.argv is set by the wsgi runner e.g. uwsgi sets it based
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# on the --pyargv parameter of the uwsgi binary
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config.parse_args(sys.argv, default_config_files=conf_files)
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logging.setup(CONF, "nova")
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gmr_opts.set_defaults(CONF)
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gmr.TextGuruMeditation.setup_autorun(
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version, conf=CONF, service_name=service_name)
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# dump conf at debug (log_options option comes from oslo.service)
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# FIXME(mriedem): This is gross but we don't have a public hook into
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# oslo.service to register these options, so we are doing it manually for
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# now; remove this when we have a hook method into oslo.service.
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CONF.register_opts(service_opts.service_opts)
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if CONF.log_options:
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CONF.log_opt_values(
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logging.getLogger(__name__),
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logging.DEBUG)
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def init_application(name):
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conf_files = _get_config_files()
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# NOTE(melwitt): The init_application method can be called multiple times
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# within a single python interpreter instance if any exception is raised
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# during it (example: DBConnectionError while setting up the service) and
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# apache/mod_wsgi reloads the init_application script. So, we initialize
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# global data separately and decorate the method to run only once in a
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# python interpreter instance.
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init_global_data(conf_files, name)
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try:
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_setup_service(CONF.host, name)
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except exception.ServiceTooOld as exc:
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return error_application(exc, name)
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# This global init is safe because if we got here, we already successfully
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# set up the service and setting up the profile cannot fail.
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service.setup_profiler(name, CONF.host)
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conf = conf_files[0]
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return deploy.loadapp('config:%s' % conf, name=name)
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