In this lab, we will list all devices which are not reachable by a monitoring tool. This is good when we want to improve the overall monitoring experience and decrease the size queue (metrics which has not been arrived at the instance).
Today we are talking about a use case when it’s impossible to find a proper way to write a recovery expression for the Zabbix trigger. In other words, we know how to identify problems. But there is no good way to detect when the problem is gone.