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UpdatingServerConfig.md

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Changing the Default keycloak-subsystem Configuration

If you need to make a change to the default keycloak-subsystem configuration that is packaged with our distributions, you will need to edit this file: https://github.com/keycloak/keycloak/blob/master/wildfly/server-subsystem/src/main/config/default-server-subsys-config.properties

This file contains a single multi-line property containing the subsystem xml declaration. Maven filtering is used to read this property and inject it everywhere it needs to go. Editing this file will also take care of propagating it to the distributions like server-dist and demo-dist.

Also, you need to create CLI commands for each change by editing this file: https://github.com/keycloak/keycloak/blob/master/wildfly/server-subsystem/src/main/resources/cli/default-keycloak-subsys-config.cli

This CLI snippet is used in the scripts required by the overlay distribution.

Updating an SPI

The changes you will likely make are when you need to add a new SPI, change an existing SPI, or add/change a provider within an SPI.

All elements in an SPI declaration are optional, but a full SPI declaration looks like this:

<spi name="dblock">
     <default-provider>mongo</default-provider>
     <provider name="jpa" enabled="true">
         <properties>
             <property name="lockWaitTimeout" value="800"/>
         </properties>
     </provider>
     <provider name="mongo" enabled="true">
         <properties>
             <property name="lockRecheckTime" value="2"/>
             <property name="lockWaitTimeout" value="600"/>
         </properties>
     </provider>
</spi>

Here we have two providers defined for the SPI dblock. The default-provider is listed as mongo. However it is up to the SPI to decide how it will treat this setting. Some SPIs allow more than one provider and some do not. So default-provider can help the SPI to choose.

Also notice that each provider defines its own set of configuration properties. The fact that both providers above have a property called lockWaitTimeout is just a coincidence.

Values of type List

The type of each property value is interpreted by the provider. However, there is one exception. Consider the jpa provider for the eventStore API:

<spi name="eventsStore">
     <provider name="jpa" enabled="true">
         <properties>
             <property name="exclude-events" value="[&quot;EVENT1&quot;,&quot;EVENT2&quot;]"/>
         </properties>
     </provider>
</spi>

We see that the value begins and ends with square brackets. That means that the value will be passed to the provider as a list. In this example, the system will pass the provider a list with two element values EVENT1 and EVENT2. To add more values to the list, just separate each list element with a comma. Unfortunately, you do need to escape the quotes surrounding each list element with &quot;.