12.7.2.1. Procedure – Configuring the Availability Checker

Complete the following steps in order to add Availability Checker component to the configuration.

1. Select the host in the configuration tree and click the New button below the Components in use subwindow on the Host tab to add the Availability Checker component.

2. Choose the Default template and change the component name, if needed.

3. The Availability Checker component appears in the configuration tree.

4. Set the configuration options for the Availability Checker component under the Configuration tab.

   

   Figure 12.30. Configuration options for Availability Checker

   New, monitored target addresses can be added as new checks, specifying the followings:

   • the check method (Type)

   • host address

   • port

   • check interval

   • response timeout

   • other, method-dependent options

   Apart from the ping, TCP, and HTTP methods, there is a custom type method which can use any executable program's return value. The returned values shall be set so, that the value zero shows success, the other values represent failure. Programs used in custom checks, get the Response timeout value as the value of the --timeout RESPONSE_TIMEOUT first command line parameter. Executable programs are terminated with the SIGTERM signal in 5 seconds after the timeout value has elapsed as set in the Response timeout parameter.

   

   Figure 12.31. Check details

5. Check the Status tab. Following the upload of the plugin configuration and the restart of the service, the Status tab shows the actual status of the checks. The status of each target address comes from the aggregated status values of the checks of the certain address.

   

   Figure 12.32. Status of checks

   Note
   The auto refresh time of the Status tab can be globally configured in the Program status section of Edit menu in Preferences... option.