5. Within the Ambari web UI, click on the "Host" tab to display all the hosts for the cluster. Click on the host in which you just added the JournalNode service to in step 4. On this page you should see the JournalNode component in the "Components" section. Next to the JournalNode label is a drop down button, click it and select the "install" option. A progress bar should show up displaying the progress of the installation.