208 lines
9.6 KiB
Python
208 lines
9.6 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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from oslo_config import cfg
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database_opts = [
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cfg.BoolOpt('sqlite_synchronous',
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deprecated_group='DEFAULT',
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default=True,
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help='If True, SQLite uses synchronous mode.'),
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cfg.StrOpt('backend',
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default='sqlalchemy',
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deprecated_name='db_backend',
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deprecated_group='DEFAULT',
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help='The back end to use for the database.'),
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cfg.StrOpt('connection',
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help='The SQLAlchemy connection string to use to connect to '
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'the database.',
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secret=True,
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deprecated_opts=[cfg.DeprecatedOpt('sql_connection',
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group='DEFAULT'),
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cfg.DeprecatedOpt('sql_connection',
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group='DATABASE'),
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cfg.DeprecatedOpt('connection',
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group='sql'), ]),
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cfg.StrOpt('slave_connection',
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secret=True,
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help='The SQLAlchemy connection string to use to connect to the'
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' slave database.'),
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cfg.StrOpt('mysql_sql_mode',
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default='TRADITIONAL',
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help='The SQL mode to be used for MySQL sessions. '
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'This option, including the default, overrides any '
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'server-set SQL mode. To use whatever SQL mode '
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'is set by the server configuration, '
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'set this to no value. Example: mysql_sql_mode='),
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cfg.BoolOpt('mysql_enable_ndb',
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default=False,
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help='If True, transparently enables support for handling '
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'MySQL Cluster (NDB).'),
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cfg.IntOpt(
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'connection_recycle_time',
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default=3600,
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help='Connections which have been present in the connection '
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'pool longer than this number of seconds will be replaced '
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'with a new one the next time they are checked out from '
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'the pool.'),
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cfg.IntOpt('max_pool_size',
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default=5,
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help='Maximum number of SQL connections to keep open in a '
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'pool. Setting a value of 0 indicates no limit.'),
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cfg.IntOpt('max_retries',
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default=10,
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deprecated_opts=[cfg.DeprecatedOpt('sql_max_retries',
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group='DEFAULT'),
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cfg.DeprecatedOpt('sql_max_retries',
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group='DATABASE')],
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help='Maximum number of database connection retries '
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'during startup. Set to -1 to specify an infinite '
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'retry count.'),
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cfg.IntOpt('retry_interval',
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default=10,
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deprecated_opts=[cfg.DeprecatedOpt('sql_retry_interval',
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group='DEFAULT'),
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cfg.DeprecatedOpt('reconnect_interval',
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group='DATABASE')],
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help='Interval between retries of opening a SQL connection.'),
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cfg.IntOpt('max_overflow',
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default=50,
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deprecated_opts=[cfg.DeprecatedOpt('sql_max_overflow',
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group='DEFAULT'),
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cfg.DeprecatedOpt('sqlalchemy_max_overflow',
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group='DATABASE')],
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help='If set, use this value for max_overflow with '
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'SQLAlchemy.'),
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cfg.IntOpt('connection_debug',
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default=0,
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min=0, max=100,
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deprecated_opts=[cfg.DeprecatedOpt('sql_connection_debug',
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group='DEFAULT')],
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help='Verbosity of SQL debugging information: 0=None, '
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'100=Everything.'),
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cfg.BoolOpt('connection_trace',
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default=False,
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deprecated_opts=[cfg.DeprecatedOpt('sql_connection_trace',
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group='DEFAULT')],
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help='Add Python stack traces to SQL as comment strings.'),
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cfg.IntOpt('pool_timeout',
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deprecated_opts=[cfg.DeprecatedOpt('sqlalchemy_pool_timeout',
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group='DATABASE')],
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help='If set, use this value for pool_timeout with '
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'SQLAlchemy.'),
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cfg.BoolOpt('use_db_reconnect',
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default=False,
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help='Enable the experimental use of database reconnect '
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'on connection lost.'),
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cfg.IntOpt('db_retry_interval',
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default=1,
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help='Seconds between retries of a database transaction.'),
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cfg.BoolOpt('db_inc_retry_interval',
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default=True,
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help='If True, increases the interval between retries '
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'of a database operation up to db_max_retry_interval.'),
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cfg.IntOpt('db_max_retry_interval',
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default=10,
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help='If db_inc_retry_interval is set, the '
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'maximum seconds between retries of a '
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'database operation.'),
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cfg.IntOpt('db_max_retries',
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default=20,
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help='Maximum retries in case of connection error or deadlock '
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'error before error is '
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'raised. Set to -1 to specify an infinite retry '
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'count.'),
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cfg.StrOpt('connection_parameters',
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default='',
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help='Optional URL parameters to append onto the connection '
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'URL at connect time; specify as '
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'param1=value1¶m2=value2&...'),
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]
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def set_defaults(conf, connection=None, max_pool_size=None,
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max_overflow=None, pool_timeout=None):
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"""Set defaults for configuration variables.
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Overrides default options values.
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:param conf: Config instance specified to set default options in it. Using
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of instances instead of a global config object prevents conflicts between
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options declaration.
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:type conf: oslo.config.cfg.ConfigOpts instance.
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:keyword connection: SQL connection string.
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Valid SQLite URL forms are:
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* sqlite:///:memory: (or, sqlite://)
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* sqlite:///relative/path/to/file.db
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* sqlite:////absolute/path/to/file.db
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:type connection: str
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:keyword max_pool_size: maximum connections pool size. The size of the pool
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to be maintained, defaults to 5. This is the largest number of connections
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that will be kept persistently in the pool. Note that the pool begins with
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no connections; once this number of connections is requested, that number
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of connections will remain.
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:type max_pool_size: int
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:default max_pool_size: 5
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:keyword max_overflow: The maximum overflow size of the pool. When the
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number of checked-out connections reaches the size set in pool_size,
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additional connections will be returned up to this limit. When those
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additional connections are returned to the pool, they are disconnected and
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discarded. It follows then that the total number of simultaneous
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connections the pool will allow is pool_size + max_overflow, and the total
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number of "sleeping" connections the pool will allow is pool_size.
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max_overflow can be set to -1 to indicate no overflow limit; no limit will
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be placed on the total number of concurrent connections. Defaults to 10,
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will be used if value of the parameter in `None`.
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:type max_overflow: int
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:default max_overflow: None
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:keyword pool_timeout: The number of seconds to wait before giving up on
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returning a connection. Defaults to 30, will be used if value of the
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parameter is `None`.
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:type pool_timeout: int
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:default pool_timeout: None
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"""
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conf.register_opts(database_opts, group='database')
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if connection is not None:
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conf.set_default('connection', connection, group='database')
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if max_pool_size is not None:
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conf.set_default('max_pool_size', max_pool_size, group='database')
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if max_overflow is not None:
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conf.set_default('max_overflow', max_overflow, group='database')
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if pool_timeout is not None:
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conf.set_default('pool_timeout', pool_timeout, group='database')
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def list_opts():
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"""Returns a list of oslo.config options available in the library.
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The returned list includes all oslo.config options which may be registered
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at runtime by the library.
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Each element of the list is a tuple. The first element is the name of the
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group under which the list of elements in the second element will be
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registered. A group name of None corresponds to the [DEFAULT] group in
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config files.
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The purpose of this is to allow tools like the Oslo sample config file
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generator to discover the options exposed to users by this library.
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:returns: a list of (group_name, opts) tuples
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"""
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return [('database', database_opts)]
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