We currently have a some EPP rules that are the same as the Delayed Action Example (https://www.netxms.org/documentation/adminguide/_images/delayed_action.png) in the documentation but we wanted to do the same thing for the uptime alert as well. We want to cause a notification action to occur if a node goes back up after the downtime has been longer than N (the length of the downtime timer) but don't want to cause a notification action to occur if the node goes back up if the downtime has been shorter than N (the length of the downtime timer).
I'm assuming the best way to do this is to utilise the Persistent Storage functionality? Set a timestamp when it goes down and have another rule that deletes the stored value if it goes back up before N (through use of a filtering script) and another rule that executes a notification action if it goes back up after N (through use of a filtering script)?
Any advice on specifics would be helpful.
Yes, persistent storage (or custom attribute on a node) that holds timestamp of last SYS_NODE_DOWN would be best solution.
Best regards,
Victor