6.4. Clustering KIE Servers with the headless Decision Manager controller

Procedure

1. Navigate to the Software Downloads page in the Red Hat Customer Portal (login required), and select the product and version from the drop-down options:

   • Product: Decision Manager
   • Version: 7.8
2. Download Red Hat Decision Manager 7.8.0 Add Ons (the rhdm-7.8.0-add-ons.zip file).
3. Unzip the rhdm-7.8.0-add-ons.zip file. The rhdm-7.8.0-controller-ee7.zip file is in the unzipped directory.
4. Extract the rhdm-7.8.0-controller-ee7 archive to a temporary directory. In the following examples this directory is called TEMP_DIR.

5. Copy the TEMP_DIR/rhdm-7.8.0-controller-ee7/controller.war directory to EAP_HOME/standalone/deployments/.

   警告

   Ensure that the names of the headless Decision Manager controller deployments you copy do not conflict with your existing deployments in the Red Hat JBoss EAP instance.

6. Copy the contents of the TEMP_DIR/rhdm-7.8.0-controller-ee7/SecurityPolicy/ directory to EAP_HOME/bin. When asked to overwrite files, select Yes.
7. In the EAP_HOME/standalone/deployments/ directory, create an empty file named controller.war.dodeploy. This file ensures that the headless Decision Manager controller is automatically deployed when the server starts.
8. Open the EAP_HOME/standalone/configuration/standalone.xml file in a text editor.

9. Add the following properties to the <system-properties> element and replace <NFS_STORAGE> with the absolute path to the NFS storage where the template configuration is stored:

   <system-properties>
     <property name="org.kie.server.controller.templatefile.watcher.enabled" value="true"/>
     <property name="org.kie.server.controller.templatefile" value="<NFS_STORAGE>"/>
   </system-properties>

   Template files contain default configurations for specific deployment scenarios.

   If the value of the org.kie.server.controller.templatefile.watcher.enabled property is set to true, a separate thread is started to watch for modifications of the template file. The default interval for these checks is 30000 milliseconds and can be further controlled by the org.kie.server.controller.templatefile.watcher.interval system property. If the value of this property is set to false, changes to the template file are detected only when the server restarts.

10. To start the headless Decision Manager controller, navigate to EAP_HOME/bin and enter the following command:

    • On Linux or UNIX-based systems:

      $ ./standalone.sh

    • On Windows:

      standalone.bat