Adding cluster services
You can add a cluster service definition with one of the following methods:
•  Right-click on the Cluster Services node in the cluster tree in the left pane and select New.
•  Click New on the toolbar and select New Cluster Service.
•  Click Action New Cluster Service from the menu bar.
•  Right-click on the cluster name in the cluster tree in the left pane and select Properties. Then go to the Cluster services tab and click Add.
All of the above methods open the Cluster Services window.
1. In the IP address / name field, type the IP address (or DNS name) of the server on which the cluster service will run.
2. In the Description field, type a descriptive name to make it easier for you to remember the definition.
3. Select the Continue to add a server on the same machine check box to automatically open the New Server window with the same IP address. This is intended to save you from entering the same IP address twice.
4. Click OK.
HAM tries to communicate with the given server (using the IP address that you provided) instructing it to register itself with the cluster. If the operation succeeds, you will see the added cluster in the Cluster Services list of the Cluster Properties window after the Add Cluster Services window closes. If the operation fails, you must check if:
•  The software has been correctly installed on the target machine.
•  There is open communication between the target machine and the one running HAM (for example, they are not blocked by a firewall).
•  The Sentinel service on the cluster service machine is started.
•  The target machine does not already belong to your cluster or to another cluster (as a cluster service machine).
From the Cluster Properties window, in the Cluster services tab, you may also need to define the Port to be used by the cluster services. By default, port 20000 is configured. Cluster services require this port to communicate between each other.
Under Session weights, you can define the weight you want to give to each type of user session (display, printer and file transfer). By default, the printer and file transfer sessions are configured with a weight of 3 while the display sessions have a weight of 1. This means that every printer or file transfer session is equivalent to 3 display sessions. The cluster services use these values to calculate the load that each server is handling in order to decide which one is least busy.
Notes
You must define at least one cluster service to define a cluster:
•  When you have defined (or added) a machine as a cluster service in one cluster, this machine cannot be added to another cluster.
•  If you want to change the cluster to which a machine belongs, you must first remove it from its original cluster.
•  The Modify button allows you to only change the description of the cluster service and not its address. To change the address, remove the existing one, and then create a new one.