Until now, you have learned how most of a server's components work and how to leverage Zabbix to acquire data from various external sources. Considering that, set up your monitoring system in a large, heterogeneous, and complex infrastructure. Most probably, you will find a different custom device, server appliance, and proprietary hardware. Usually, all those devices have an interface to be enquired, but, unfortunately, it often happens that most of the metrics are not exposed via Simple Network Management Protocol (SNMP) or any other standard query method.
Let's consider a practical example. Nowadays, all the UPSes own a temperature sensor, and if you are in a complex infrastructure, it is possible that those UPS's are custom made and out of standard, and, most probably, this sensor can be enquired only with a tool provided from the UPS vendor. Now, the temperature of a UPS is a critical parameter, especially if the UPS is a big, custom-made UPS. It...