Assigning an Alert to a Module

Go the agent editing, where the module is defined and click on the alert tab:

Now add the module (Host Alive), the template (Critical Condition) and the action (Mail to admin). Click Add alert.

Once added, you may see in the agent view whether it is running or not, by taking a look at is state color:

When the host goes offline the alert will fire:

An email should be received, something similar to this one:

Pandora FMS alerts are extremely flexible and, therefore sometimes complex to use. There is a specific chapter for those in the documentation: Alerts in Pandora FMS.