Create Resource Group Wizard - Application Controller

Use this page to configure one or more application controllers for the resource group.

An application controller is a collection of start and stop scripts for an application as defined to PowerHA® SystemMirror. The start and stop scripts for the application are the main points for application control for PowerHA SystemMirror over the application. The scripts must run correctly to enable accurate start and stop of the application. If the scripts fail to correctly control the application, other parts of the application recovery might be affected. For example, if the stop script you use fails to completely stop the application and a process continues to access a disk, PowerHA SystemMirror cannot bring the volume group offline on the node that failed nor recover it on the backup node.

All fields on this page are inactive until you specify information for the Application Controller Name field. Then all fields are enabled.

Fields

Application controller name
Select a predefined application controller from the provided list or manually specify a unique name for a custom application controller that you want to define for the resource group. The name you specify must consist of a minimum of one alphanumeric character and a maximum of 64 alphanumeric characters. You can use alphabetic characters of A - Z and a - z, numbers of 0 - 9, and the underscore (_) characters. A name cannot begin with a number and cannot be a PowerHA SystemMirror reserved word.

If you choose a predefined application controller, the Start script and Stop script for the application controllers are also predefined. These fields are completed for you and you cannot change them.

Start script
Specify the full path and file name of the program to be used to start the application server, along with any additional arguments to be passed to the program when it runs. This program is run whenever the required resources become available, such as when a node joins the cluster. You can use a maximum of 256 alphanumeric character. This script must be in the same location on each cluster node that might start the server. The contents of the script, however, can differ.
Stop script
Specify the full path and file name of the program to be used to stop the application server, along with any additional arguments to be passed to the program when it runs. This program is run whenever the required resources become available, such as when a node joins the cluster. You can use a maximum of 256 alphanumeric characters. This script must be in the same location on each cluster node that might start the server. The contents of the script, however, can differ.
Application monitors
Select one or more application monitors from the table to use with this application. This table contains a list of all predefined application monitors, and lists application monitors that you defined by using the Application Monitor page. You can only select application monitors when creating an application controller, not when editing the properties of an existing application controller.

Actions

Add Another
Click Add Another to add another set of fields so that you can create and configure another application controller for your custom resource group. All fields for the added application controller are inactive until you select the first field, typically the name field. All fields for the added application controller are inactive until you specify information for the Application Controller Name field. Then all fields are enabled.
Remove
Click Remove to remove the content from the first set of application controller fields and to disable all fields after the Application Controller Name field. If applied to an added application controller on the page, this action removes the entire set of fields for the added controller.