For high availability, distributed installations can use a load balancer in front of a cluster of vRealize Automation appliance nodes.

You use the management interface on the new vRealize Automation appliance to join it to an existing cluster of one or more appliances. The join operation copies configuration information to the new appliance that you are adding, including certificate, SSO, licensing, database, and messaging information.

You must add appliances to a cluster one at a time and not in parallel.


  • Have one or more vRealize Automation appliances already in the cluster, where one is the primary node. See Configure the First vRealize Automation Appliance in a Cluster.

    You can set a new appliance to be the primary node only after joining it to the cluster.

  • Create the new appliance node. See Deploy the vRealize Automation Appliance.

  • Verify that the load balancer is configured for use with the new appliance.

  • Verify that traffic can pass through the load balancer to reach all current nodes and the new node that you are about to add.

  • Verify that all vRealize Automation services are started on the current nodes.


  1. Log in to the new vRealize Automation appliance management interface as root.


    Continue past any certificate warnings.

  2. If the installation wizard appears, cancel it so that you can go to the management interface instead of the wizard.
  3. Select Admin > Time Settings, and set the time source to the same one that the rest of the cluster appliances use.
  4. Select vRA Settings > Cluster.
  5. Enter the FQDN of a previously configured vRealize Automation appliance in the Leading Cluster Node text box.

    You can use the FQDN of the primary vRealize Automation appliance, or any vRealize Automation appliance that is already joined to the cluster.

  6. Type the root password in the Password text box.
  7. Click Join Cluster.
  8. Continue past any certificate warnings.

    Services for the cluster are restarted.

  9. Verify that services are running.
    1. Click the Services tab.
    2. Click the Refresh tab to monitor the progress of service startup.