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Changing to PostgreSQL

By default, WSO2 Identity Server uses the embedded H2 database as the database for storing user management and registry data. Given below are the steps you need to follow in order to use PostgreSQL for this purpose.

Datasource configurations

A datasource is used to establish the connection to a database. By default, WSO2_IDENTITY_DB and WSO2_SHARED_DB datasources are used to connect to the default  H2 database.

  • WSO2_SHARED_DB - The datasource which stores registry and user management data.
  • WSO2_IDENTITY_DB - The datasource specific for the identity server which stores identity related data

After setting up the PostgreSQL database. You can point the WSO2_IDENTITY_DB or WSO2_SHARED_DB or both to that PostgreSQL database by following the instructions below.

Changing the default datasource

Minimum configurations for changing the default datasource to PostgreSQL

You can configure the datasource by editing the default configurations in <IS-HOME>/repository/conf/deployment.toml. Following are the basic configurations and their descriptions.

Element Description
username and password The name and password of the database user.
type The type of the database.
hostname The hostname of the host where database is hosted.
port The port of the database.
name The name of the database.

A sample configuration is given below.

  1. WSO2_IDENTITY_DB

    1. Configure the deployment.toml file.

      [database.identity_db]
type = "postgre"
hostname = "localhost"
name = "testdb"
username = "regadmin"
password = "regadmin"
port = "5432"

    2. Execute database scripts.

      Navigate to <IS-HOME>/dbscripts. Execute the scripts in the following files, against the database created.

      • <IS-HOME>/dbscripts/identity/postgresql.sql
      • <IS-HOME>/dbscripts/identity/uma/postgresql.sql
      • <IS-HOME>/dbscripts/consent/postgresql.sql

  2. WSO2_SHARED_DB

    1. Configure the deployment.toml file.

      [database.shared_db]
type = "postgre"
hostname = "localhost"
name = "testdb"
username = "regadmin"
password = "regadmin"
port = "5432"

    2. Execute database scripts.

      Navigate to <IS-HOME>/dbscripts. Execute the scripts in the following file, against the database created.

      • <IS-HOME>/dbscripts/postgresql.sql

  3. If you have a requirement to use the workflow feature, see Changing the default database of BPS database.

  4. Download the Postgres JDBC driver for the version you are using and copy it to the <IS_HOME>/repository/components/lib folder.

    Note

    In earlier versions WSO2 Identity Server had the option to create databases automatically using the -DSetup option from January 2018 onwards WSO2 Identity Server has deprecated the -DSetup option Note that the proper practice is for the DBA to run the DDL statements manually so that the DBA can examine and optimize any DDL statement (if necessary) based on the DBA best practices that are in place within the organization.

Advanced Database Configurations

Apart from above basic configurations WSO2 Identity Server supports advanced database configurations.

  • WSO2_IDENTITY_DB deployment.toml configurations:
[database.identity_db.pool_options]
 maxActive = "80"
 maxWait = "60000"
 minIdle = "5"
 testOnBorrow = true
 validationQuery="SELECT 1; COMMIT"
 validationInterval="30000"
 defaultAutoCommit=false
 commitOnReturn=true
  • WSO2_SHARED_DB deployment.toml configurations:
[database.shared_db.pool_options]
 maxActive = "80"
 maxWait = "60000"
 minIdle = "5"
 testOnBorrow = true
 validationQuery="SELECT 1; COMMIT"
 validationInterval="30000"
 defaultAutoCommit=false
 commitOnReturn=true

The elements in the above configuration are described below:

maxActive The maximum number of active connections that can be allocated at the same time from this pool. Enter any negative value to denote an unlimited number of active connections.
maxWait The maximum number of milliseconds that the pool will wait (when there are no available connections) for a connection to be returned before throwing an exception. You can enter zero or a negative value to wait indefinitely.
minIdle The minimum number of active connections that can remain idle in the pool without extra ones being created, or enter zero to create none.

testOnBorrow

 Whether objects will be validated before being borrowed from the pool. If the object fails to validate, it will be dropped from the pool, and another attempt will be made to borrow another.

defaultAutoCommit

 Whether to commit database changes automatically or not.
validationInterval The indication to avoid excess validation, and only run validation at the most, at this frequency (time in milliseconds). If a connection is due for validation, but has been validated previously within this interval, it will not be validated again.
defaultAutoCommit

This property is not applicable to the Carbon database in WSO2 products because auto committing is usually handled at the code level, i.e., the default auto commit configuration specified for the RDBMS driver will be effective instead of this property element. Typically, auto committing is enabled for RDBMS drivers by default.

When auto committing is enabled, each SQL statement will be committed to the database as an individual transaction, as opposed to committing multiple statements as a single transaction.

Info

For more information on other parameters that can be defined in the <IS_HOME>/repository/conf/deployment.toml file, see Tomcat JDBC Connection Pool.

Configuring the connection pool behavior on return

By default, when a database connection is returned to the pool, the product rolls back the pending transactions if defaultAutoCommit=true.

However, if required, you can disable the latter mentioned default behavior by disabling the JDBC-Pool JDBC interceptor, ConnectionRollbackOnReturnInterceptor, and setting the connection pool behavior on return via the datasource configurations using one of the following options.

Configure the connection pool to commit pending transactions on connection return

  1. Navigate to either one of the following locations based on your OS.
    • On Linux/Mac OS: <IS_HOME>/bin/wso2server.sh/
    • On Windows: <IS_HOME>\bin\wso2server.bat

  2. Add the following JVM option:

    -Dndatasource.disable.rollbackOnReturn=true \

  3. Navigate to the <IS_HOME>/repository/conf/deployment.toml file.

  4. Disable the defaultAutoCommit by defining it as false.

  5. Add the commitOnReturn property and set it to true.

  6. WSO2_IDENTITY_DB deployment.toml configurations:

    [database.identity_db.pool_options]
defaultAutoCommit="false"
commitOnReturn="true"

  7. WSO2_SHARED_DB deployment.toml configurations:

    [database.shared_db.pool_options]
defaultAutoCommit="false"
commitOnReturn="true"

Configure the connection pool to rollback pending transactions on connection return

  1. Navigate to the <IS_HOME>/repository/conf/deployment.toml ` file.

  2. Disable the defaultAutoCommit by defining it as false.

  3. Set the rollbackOnReturn property to the datasources as true.

  4. WSO2_IDENTITY_DB deployment.toml Configurations.

    [database.identity_db.pool_options]
defaultAutoCommit="false"
rollbackOnReturn="true"

  5. WSO2_SHARED_DB deployment.toml Configurations.

    [database.shared_db.pool_options]
defaultAutoCommit="false"
rollbackOnReturn="true"

The elements in the above configuration are described below:

Element Description
commitOnReturn If defaultAutoCommit =false, then you can set commitOnReturn =true, so that the pool can complete the transaction by calling the commit on the connection as it is returned to the pool. However, If rollbackOnReturn =true then this attribute is ignored. The default value is false.
rollbackOnReturn If defaultAutoCommit =false, then you can set rollbackOnReturn =true so that the pool can terminate the transaction by calling rollback on the connection as it is returned to the pool. The default value is false.
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