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.

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_enable_ndb¶

Type:	boolean
Default:	false

If True, transparently enables support for handling MySQL Cluster (NDB).

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.

Deprecated Variations¶

Group	Name
DATABASE	idle_timeout
database	idle_timeout
DEFAULT	sql_idle_timeout
DATABASE	sql_idle_timeout
sql	idle_timeout

min_pool_size¶

Type:	integer
Default:	1

Minimum number of SQL connections to keep open in a pool.

Deprecated Variations¶

Group	Name
DEFAULT	sql_min_pool_size
DATABASE	sql_min_pool_size

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.

Deprecated Variations¶

Group	Name
DEFAULT	sql_max_pool_size
DATABASE	sql_max_pool_size

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.