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Background documentationField Help for Cluster Configuration: Cluster Info Page Locate this document in the navigation structure

 

The following provides help for some of the fields on the Cluster Info page.

Features

Function

Definition

Inactive Cluster

Check this box to indicate that this cluster is inactive.

System Default Cluster

Check this box to indicate that this is the default cluster for the system.

External ID

Type a unique identifier for the cluster. This value will be used in a URL. It should not contain spaces, and it is recommended that it include only alphanumeric characters and no special characters.

Display Name

Type a display name for the cluster. This is the name that appears in the user interface.

Hostname

Type the hostname that is used in the URLs with which users access the system. This name is also used when the application generates e-mails.

Hostname Aliases

Choose Add to create additional names that can be used to access the same cluster. These aliases will allow users to access the cluster through the alternate URLs, but the system will always default to the hostname for activities such as generating e-mails.

Note Note

It is recommended that you do not give aliases and services (under Cluster Members) identical names. If you do so, the cluster might not know where you are supposed to end up if a session times out.

End of the note.

Port

Type a port for the cluster. This is an optional setting to use if users access the cluster on one port but all services are listening on another.

Example Example

Users might access the application using the default port (80), and then be redirected to a service listening on port 8080. This field is usually unnecessary because this function is handled by the proxy on the web server.

End of the example.

The cluster configuration assumes the default port for HTTP is 80 and the default port for HTTPS is 443.

Settings

  • Force redirect to use SSL instead of incoming protocol: Check this box to force SSL for all users accessing this cluster.

  • External hostname is accessed via HTTP only: Check this box to generate external links with HTTP, not HTTPS. The initial request will be HTTP and the cluster member service will redirect the user to HTTPS. Enabling the cluster member to explicitly redirect the user ensures that the host name in the URL can match the server's SSL certificate.

  • Cluster can only be accessed via HTTPS: Check this box to indicate that the cluster can only be accessed securely.

  • Automatically add new services to this cluster: Check to automatically add new services to the cluster.

  • Enable load balancing on this cluster: Check to enable load balancing between the active services in the cluster. Currently, the only way to load balance is to send the user to the server with the lowest current user count.

Load Balancing Domain

Type the DNS domain name for the cluster.

Load Balancing Method

Indicates the type of load balancing used for the cluster. Currently, only one method (Lowest Current User Count First) can be used for cluster configurations.

Cluster Members

Choose Add to add member services to the cluster. Each cluster requires at least one member service. The member list is used to determine the actual host to which to redirect user requests. If load balancing is enabled, users are distributed across all available members in the cluster member list.