148 lines
5.3 KiB
Python
148 lines
5.3 KiB
Python
#
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# Copyright 2012 New Dream Network, LLC (DreamHost)
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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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"""Storage backend management
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"""
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from oslo_config import cfg
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from oslo_log import log
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import six.moves.urllib.parse as urlparse
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from stevedore import driver
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import tenacity
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from ceilometer import utils
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LOG = log.getLogger(__name__)
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OPTS = [
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cfg.IntOpt('metering_time_to_live',
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default=-1,
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help="Number of seconds that samples are kept "
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"in the database for (<= 0 means forever).",
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deprecated_opts=[cfg.DeprecatedOpt('time_to_live',
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'database')]),
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cfg.StrOpt('metering_connection',
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secret=True,
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help='The connection string used to connect to the metering '
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'database. (if unset, connection is used)'),
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cfg.BoolOpt('sql_expire_samples_only',
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default=False,
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help="Indicates if expirer expires only samples. If set true,"
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" expired samples will be deleted, but residual"
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" resource and meter definition data will remain."),
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]
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class StorageUnknownWriteError(Exception):
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"""Error raised when an unknown error occurs while recording."""
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class StorageBadVersion(Exception):
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"""Error raised when the storage backend version is not good enough."""
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class StorageBadAggregate(Exception):
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"""Error raised when an aggregate is unacceptable to storage backend."""
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code = 400
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def get_connection_from_config(conf):
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retries = conf.database.max_retries
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@tenacity.retry(
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wait=tenacity.wait_fixed(conf.database.retry_interval),
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stop=(tenacity.stop_after_attempt(retries) if retries >= 0
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else tenacity.stop_never),
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reraise=True)
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def _inner():
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url = (getattr(conf.database, 'metering_connection') or
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conf.database.connection)
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return get_connection(conf, url)
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return _inner()
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def get_connection(conf, url):
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"""Return an open connection to the database."""
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connection_scheme = urlparse.urlparse(url).scheme
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# SqlAlchemy connections specify may specify a 'dialect' or
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# 'dialect+driver'. Handle the case where driver is specified.
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engine_name = connection_scheme.split('+')[0]
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namespace = 'ceilometer.metering.storage'
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# NOTE: translation not applied bug #1446983
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LOG.debug('looking for %(name)r driver in %(namespace)r',
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{'name': engine_name, 'namespace': namespace})
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mgr = driver.DriverManager(namespace, engine_name)
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return mgr.driver(conf, url)
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class SampleFilter(object):
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"""Holds the properties for building a query from a meter/sample filter.
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:param user: The sample owner.
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:param project: The sample project.
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:param start_timestamp: Earliest time point in the request.
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:param start_timestamp_op: Earliest timestamp operation in the request.
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:param end_timestamp: Latest time point in the request.
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:param end_timestamp_op: Latest timestamp operation in the request.
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:param resource: Optional filter for resource id.
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:param meter: Optional filter for meter type using the meter name.
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:param source: Optional source filter.
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:param message_id: Optional sample_id filter.
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:param metaquery: Optional filter on the metadata
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"""
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def __init__(self, user=None, project=None,
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start_timestamp=None, start_timestamp_op=None,
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end_timestamp=None, end_timestamp_op=None,
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resource=None, meter=None,
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source=None, message_id=None,
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metaquery=None):
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self.user = user
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self.project = project
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self.start_timestamp = utils.sanitize_timestamp(start_timestamp)
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self.start_timestamp_op = start_timestamp_op
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self.end_timestamp = utils.sanitize_timestamp(end_timestamp)
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self.end_timestamp_op = end_timestamp_op
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self.resource = resource
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self.meter = meter
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self.source = source
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self.metaquery = metaquery or {}
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self.message_id = message_id
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def __repr__(self):
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return ("<SampleFilter(user: %s,"
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" project: %s,"
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" start_timestamp: %s,"
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" start_timestamp_op: %s,"
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" end_timestamp: %s,"
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" end_timestamp_op: %s,"
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" resource: %s,"
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" meter: %s,"
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" source: %s,"
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" metaquery: %s,"
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" message_id: %s)>" %
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(self.user,
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self.project,
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self.start_timestamp,
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self.start_timestamp_op,
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self.end_timestamp,
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self.end_timestamp_op,
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self.resource,
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self.meter,
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self.source,
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self.metaquery,
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self.message_id))
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