Have had an unusual request and am trying to figure out how to potentially accommodate it. We recently had a mistake happen where it cut off a bunch of nodes at once and Orion alerted on them just fine. However, someone is asking if we can alert not based on the node going down, but to set up specific thresholds or milestone and when X nodes goes down, it would alert. These threshold might be 25 nodes, 50 nodes, 100 nodes, 250 nodes, etc... It would send out an alert each time a threshold was passed, so one alert would go out at 25 nodes, the next at 50 nodes, etc.
Maybe I've got some brainfreeze, but I can't think of a way to do this. Using a custom query in an alert I can get a count of the nodes. Not quite sure how to do get any further though..