Zabbix 4 Network Monitoring - Third Edition

Calculated items

We'll start with calculated items that require typing in a formula. We're already monitoring total and used disk space. If we additionally wanted to monitor free disk space, we could query the agent for this information. This is where calculated items come in: if the agent or device doesn't expose a specific view of the data, or if we would like to avoid querying monitored hosts, we can do the calculation from the already retrieved values.

To create a calculated item that would compute the free disk space, do the following:

1. Navigate to Configuration | Hosts, click on Items next to A test host, and then click on Create item. Fill in the following information:

• • Name: Diskspace on / (free)
  • Type: Calculated
  • Key: calc.vfs.fs.size[/,free] ...