Zabbix 4 Network Monitoring - Third Edition

Referencing items from multiple hosts

The calculated items we've created so far referenced items on a single host or template. We just supplied item keys to the functions. We may also reference items from multiple hosts in a calculated item; in that case, the formula syntax changes slightly. The only thing we have to do is prefix the item key with the hostname, separated by a colon, the same as in the trigger expressions:

function(host:item_key) 

Let's configure an item that would compute the average CPU load on both of our hosts:

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

• • Name: Average system load for both servers
  • Type: Calculated
  • Key: calc.system.cpu.load.avg ...