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 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. Additionally, PowerHA SystemMirror cannot recover the volume group on the backup node.

The wizard does not activate any fields on this page until you specify information for the Application Controller Name field.

Fields

Application controller name
start of changeSelect a predefined application controller from the list. Alternatively, you can specify a unique name for a custom application controller manually. The name that you specify must consist of 1 - 64 characters. You can use characters of A - Z and a - z, numbers of 0 - 9, and the underscore (_) character. 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 property and the Stop script property for the application controllers are defined for you.

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Start script
Specify the full path and file name of the program to use to start the application server, along with any additional arguments to pass 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.
Stop script
Specify the full path and file name of the program to use to stop the application server, along with any additional arguments to pass 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 this wizard. You can select application monitors only when creating an application controller. You cannot select them 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. The wizard does not activate any fields for the added application controller until you specify information for the Application Controller Name field.
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.