Configuration Options

oslo.db uses oslo.config to define and manage configuration options to allow the deployer to control how an application uses the underlying database.

database

sqlite_synchronous

Type:

boolean

Default:

True

If True, SQLite uses synchronous mode.

Deprecated Variations

Group	Name
DEFAULT	sqlite_synchronous

backend

Type:

string

Default:

sqlalchemy

The back end to use for the database.

Deprecated Variations

Group	Name
DEFAULT	db_backend

connection

Type:

string

Default:

<None>

The SQLAlchemy connection string to use to connect to the database.

Deprecated Variations

Group	Name
DEFAULT	sql_connection
DATABASE	sql_connection
sql	connection

slave_connection

Type:

string

Default:

<None>

The SQLAlchemy connection string to use to connect to the slave database.

mysql_sql_mode

Type:

string

Default:

TRADITIONAL

The SQL mode to be used for MySQL sessions. This option, including the default, overrides any server-set SQL mode. To use whatever SQL mode is set by the server configuration, set this to no value. Example: mysql_sql_mode=

mysql_wsrep_sync_wait

Type:

integer

Default:

<None>

For Galera only, configure wsrep_sync_wait causality checks on new connections. Default is None, meaning don’t configure any setting.

connection_recycle_time

Type:

integer

Default:

3600

Connections which have been present in the connection pool longer than this number of seconds will be replaced with a new one the next time they are checked out from the pool.

max_pool_size

Type:

integer

Default:

5

Maximum number of SQL connections to keep open in a pool. Setting a value of 0 indicates no limit.

max_retries

Type:

integer

Default:

10

Maximum number of database connection retries during startup. Set to -1 to specify an infinite retry count.

Deprecated Variations

Group	Name
DEFAULT	sql_max_retries
DATABASE	sql_max_retries

retry_interval

Type:

integer

Default:

10

Interval between retries of opening a SQL connection.

Deprecated Variations

Group	Name
DEFAULT	sql_retry_interval
DATABASE	reconnect_interval

max_overflow

Type:

integer

Default:

50

If set, use this value for max_overflow with SQLAlchemy.

Deprecated Variations

Group	Name
DEFAULT	sql_max_overflow
DATABASE	sqlalchemy_max_overflow

connection_debug

Type:

integer

Default:

0

Minimum Value:

0

Maximum Value:

100

Verbosity of SQL debugging information: 0=None, 100=Everything.

Deprecated Variations

Group	Name
DEFAULT	sql_connection_debug

connection_trace

Type:

boolean

Default:

False

Add Python stack traces to SQL as comment strings.

Deprecated Variations

Group	Name
DEFAULT	sql_connection_trace

pool_timeout

Type:

integer

Default:

<None>

If set, use this value for pool_timeout with SQLAlchemy.

Deprecated Variations

Group	Name
DATABASE	sqlalchemy_pool_timeout

use_db_reconnect

Type:

boolean

Default:

False

Enable the experimental use of database reconnect on connection lost.

db_retry_interval

Type:

integer

Default:

1

Seconds between retries of a database transaction.

db_inc_retry_interval

Type:

boolean

Default:

True

If True, increases the interval between retries of a database operation up to db_max_retry_interval.

db_max_retry_interval

Type:

integer

Default:

10

If db_inc_retry_interval is set, the maximum seconds between retries of a database operation.

db_max_retries

Type:

integer

Default:

20

Maximum retries in case of connection error or deadlock error before error is raised. Set to -1 to specify an infinite retry count.

connection_parameters

Type:

string

Default:

''

Optional URL parameters to append onto the connection URL at connect time; specify as param1=value1&param2=value2&…