/usr/lib/python2.7/dist-packages/aodh/storage/impl_mongodb.py is in python-aodh 2.0.0-0ubuntu1.
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# Copyright 2012 New Dream Network, LLC (DreamHost)
# Copyright 2013 eNovance
# Copyright 2014-2015 Red Hat, Inc
#
# Authors: Doug Hellmann <doug.hellmann@dreamhost.com>
# Julien Danjou <julien@danjou.info>
# Eoghan Glynn <eglynn@redhat.com>
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""MongoDB storage backend"""
from oslo_log import log
import pymongo
from aodh import storage
from aodh.storage.mongo import utils as pymongo_utils
from aodh.storage import pymongo_base
LOG = log.getLogger(__name__)
class Connection(pymongo_base.Connection):
"""Put the alarm data into a MongoDB database."""
CONNECTION_POOL = pymongo_utils.ConnectionPool()
def __init__(self, conf, url):
self.conf = conf
# NOTE(jd) Use our own connection pooling on top of the Pymongo one./
# We need that otherwise we overflow the MongoDB instance with new
# connection since we instantiate a Pymongo client each time someone
# requires a new storage connection.
self.conn = self.CONNECTION_POOL.connect(
url,
conf.database.max_retries,
conf.database.retry_interval)
# Require MongoDB 2.4 to use $setOnInsert
if self.conn.server_info()['versionArray'] < [2, 4]:
raise storage.StorageBadVersion("Need at least MongoDB 2.4")
connection_options = pymongo.uri_parser.parse_uri(url)
self.db = getattr(self.conn, connection_options['database'])
if connection_options.get('username'):
self.db.authenticate(connection_options['username'],
connection_options['password'])
# NOTE(jd) Upgrading is just about creating index, so let's do this
# on connection to be sure at least the TTL is correctly updated if
# needed.
self.upgrade()
@staticmethod
def update_ttl(ttl, ttl_index_name, index_field, coll):
"""Update or ensure time_to_live indexes.
:param ttl: time to live in seconds.
:param ttl_index_name: name of the index we want to update or ensure.
:param index_field: field with the index that we need to update.
:param coll: collection which indexes need to be updated.
"""
indexes = coll.index_information()
if ttl <= 0:
if ttl_index_name in indexes:
coll.drop_index(ttl_index_name)
return
if ttl_index_name in indexes:
return coll.database.command(
'collMod', coll.name,
index={'keyPattern': {index_field: pymongo.ASCENDING},
'expireAfterSeconds': ttl})
coll.ensure_index([(index_field, pymongo.ASCENDING)],
expireAfterSeconds=ttl,
name=ttl_index_name)
def upgrade(self):
super(Connection, self).upgrade()
# Establish indexes
ttl = self.conf.database.alarm_history_time_to_live
self.update_ttl(
ttl, 'alarm_history_ttl', 'timestamp', self.db.alarm_history)
def clear(self):
self.conn.drop_database(self.db.name)
# Connection will be reopened automatically if needed
self.conn.close()
def clear_expired_alarm_history_data(self, alarm_history_ttl):
"""Clear expired alarm history data from the backend storage system.
Clearing occurs according to the time-to-live.
:param alarm_history_ttl: Number of seconds to keep alarm history
records for.
"""
LOG.debug("Clearing expired alarm history data is based on native "
"MongoDB time to live feature and going in background.")
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