The low-level discovery protocol provides an automated way to create items, triggers, and graphs for different entities on a computer. For instance, Zabbix can automatically start monitoring filesystems or network interfaces on your machine without the need to create items for each filesystem or network interface manually. Actually, the results found thanks to the discovery can trigger many different actions, such as even removing unneeded entities such as items and so on. This functionality gives a lot of flexibility to our monitoring system. Zabbix, indeed, lets you customize and create a brand-new low-level discovery rule to discovery any type of Zabbix entity.

Let's see which one is the output used by a low-level discovery item such as vfs.fs.discovery. To see the output, we can simply run the following command:

$ zabbix_get –s 127.0.0.1 –k vfs.fs.discovery
{"data":[
{"{#FSNAME}":"/","{#FSTYPE}":"rootfs"},
{"{#FSNAME}":"/proc","{#FSTYPE}":"proc"},
{"{...