nanny

I wrote a system that allows that kinda thing, you'd fire a message saying "Hey alert me if you don't hear again in the next five minutes". This kinda heartbeat can be submitted via cron from servers, etc. Alerts can then be fired if deadlines are missed, and you can submit your own id/title/timeout period. If you wanted it to route alerts you'd just say "raise the alert now" rather than "+5m", or whatever. https://github.com/skx/purppura Development kinda stopped, but the system worked and had a flexible notification system - so you could email, use pushover, etc, etc - as well as a HTTP user interface so you can view pending/raised alerts. Related, and linked in my repo, is the similar tool Nanny which has more native integrations but the same basic idea: https://github.com/lunemec/nanny/

I use something similar, based upon JSON submissions to HTTP end-points. Here is a brief overview of how you'd use it: https://github.com/skx/purppura/blob/master/ALERTS.md My particular project does more, but this style of "expect an update, raise if it doesn't arrive" is very natural and useful - a simpler alternative based just on that idea is nanny: https://github.com/lunemec/nanny/ But I guess there are a lot of these packages out there, and a bunch of commercial SaaS implementations too.