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Migrating the Database

{project_name} can automatically migrate the database schema, or you can choose to do it manually. By default the database is automatically migrated when you start the new installation for the first time.

Automatic Relational Database Migration

To enable automatic upgrading of the database schema, set the migrationStrategy property value to "update" for the default connectionsJpa provider:

 <spi name="connectionsJpa">
    <provider name="default" enabled="true">
        <properties>
            ...
            <property name="migrationStrategy" value="update"/>
        </properties>
    </provider>
</spi>

Or run this CLI command:

/subsystem=keycloak-server/spi=connectionsJpa/provider=default/:map-put(name=properties,key=migrationStrategy,value=update)

When you start the server with this setting your database is automatically migrated if the database schema has changed in the new version.

Creating an index on huge tables with millions of records can easily take a huge amount of time and potentially cause major service disruption on upgrades. For those cases, we added a threshold (the number of records) for automated index creation. By default, this threshold is 100000 records. When the number of records is higher than the threshold, the index is not created automatically, and there will be a warning message in server logs including SQL commands which can be applied later manually.

To change the threshold, set the indexCreationThreshold property, value for the default connectionsLiquibase provider:

<spi name="connectionsLiquibase">
    <provider name="default" enabled="true">
        <properties>
            <property name="indexCreationThreshold" value="100000"/>
        </properties>
    </provider>
</spi>

Or run this CLI command:

/subsystem=keycloak-server/spi=connectionsLiquibase/:add(default-provider=default)
/subsystem=keycloak-server/spi=connectionsLiquibase/provider=default/:add(properties={indexCreationThreshold => "100000"},enabled=true)

Manual Relational Database Migration

To enable manual upgrading of the database schema, set the migrationStrategy property value to "manual" for the default connectionsJpa provider:

 <spi name="connectionsJpa">
    <provider name="default" enabled="true">
        <properties>
            ...
            <property name="migrationStrategy" value="manual"/>
        </properties>
    </provider>
</spi>

Or run this CLI command:

/subsystem=keycloak-server/spi=connectionsJpa/provider=default/:map-put(name=properties,key=migrationStrategy,value=manual)

When you start the server with this configuration it checks if the database needs to be migrated. The required changes are written to an SQL file that you can review and manually run against the database. For further details on how to apply this file to the database, see the documentation for the relational database you’re using. After the changes have been written to the file, the server exits.