5d27af4079
Change migrates the monasca-api to use oslo-config-generator in order to always build newest configuration file. That removes the need of maintaning the file along with changes to oslo configuration. The example of the file is also included in the documentation. Also: * ported case for launching api under WSGI and allowing the argument parsing of oslo to take place Story: 2000970 Task: 4865 Story: 2000964 Task: 4106 Change-Id: I57547b0e2122e40f58db5f949773900b76214526
88 lines
2.6 KiB
Python
88 lines
2.6 KiB
Python
# Copyright 2017 FUJITSU LIMITED
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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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import sys
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from oslo_config import cfg
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from oslo_log import log
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from monasca_api import conf
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from monasca_api import version
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CONF = conf.CONF
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LOG = log.getLogger(__name__)
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_CONF_LOADED = False
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_GUNICORN_MARKER = 'gunicorn'
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def parse_args(argv=None, config_file=None):
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"""Loads application configuration.
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Loads entire application configuration just once.
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"""
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global _CONF_LOADED
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if _CONF_LOADED:
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LOG.debug('Configuration has been already loaded')
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return
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log.set_defaults()
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log.register_options(CONF)
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argv = (argv if argv is not None else sys.argv[1:])
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args = ([] if _is_running_under_gunicorn() else argv or [])
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config_file = (_get_deprecated_config_file()
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if config_file is None else config_file)
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CONF(args=args,
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prog='api',
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project='monasca',
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version=version.version_str,
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default_config_files=[config_file] if config_file else None,
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description='RESTful API for alarming in the cloud')
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log.setup(CONF,
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product_name='monasca-api',
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version=version.version_str)
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conf.register_opts()
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_CONF_LOADED = True
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def _is_running_under_gunicorn():
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"""Evaluates if api runs under gunicorn."""
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content = filter(lambda x: x != sys.executable and _GUNICORN_MARKER in x,
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sys.argv or [])
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return len(list(content) if not isinstance(content, list) else content) > 0
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def _get_deprecated_config_file():
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"""Get deprecated config file.
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Responsible for keeping backward compatibility with old name of
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the configuration file i.e. api-config.conf.
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New name is => api.conf as prog=api.
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Note:
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Old configuration file name did not follow a convention
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oslo_config expects.
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"""
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old_files = cfg.find_config_files(project='monasca', prog='api-config')
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if old_files is not None and len(old_files) > 0:
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LOG.warning('Detected old location "/etc/monasca/api-config.conf" '
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'of main configuration file')
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return old_files[0]
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