0250f81cdc
This commit adds a schema management tool for the Monasca
configuration database. Apart from the usual OpenStack schema
management tool subcommands (stamp, upgrade, version) it has
two extra subcommands:
* fingerprint: for computing a SHA1 fingerprint of the
currently currently active database schema.
* detect-revision: for identifiying the Alembic revision
(if any) corresponding to a database
schema that was created with one of the
legacy SQL scripts.
The data provided by the detect-revision subcommand can be
used for stamping the database with Alembic version metadata
when transitioning an existing Monasca configuration database
to Alembic based database migrations.
Story: 2001654
Task: 14341
Change-Id: Ibdd877a23ab5d6d1bbf8d83515c0197554098526
105 lines
3.1 KiB
Python
105 lines
3.1 KiB
Python
# Copyright 2017 FUJITSU LIMITED
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# Copyright 2018 OP5 AB
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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 oslo_policy import opts as policy_opts
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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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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=get_config_file(config_file),
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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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policy_opts.set_defaults(CONF)
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_CONF_LOADED = True
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def get_config_file(config_file):
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"""Get config file in a format suitable for CONF constructor
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Returns the config file name as a single element array. If a config file
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was explicitly, specified, that file's name is returned. If there isn't and a
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legacy config file is present that one is returned. Otherwise we return
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None. This is what the CONF constructor expects for its
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default_config_files keyword argument.
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"""
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if config_file is not None:
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return [config_file]
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return _get_deprecated_config_file()
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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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return None
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