We have a use case where we would like to get alerted only when all hosts of belongs to a perticular category are down. For example, we have six app-nodes app-node-1, node-2 … node-6. I am searching for a solution where I would like to be notified only when all the app-nodes are down. This would make sense, if I do not want to disturb on-duty during the night when one or two nodes are down but only when all nodes are down.
I thougth this could be achievable via host group. But I do not find a way to configure this via Notifications.
Does any one know how to achieve this ?