Calculated discovery item prototypes?

[aspeagle]

So... wondering if this is even possible.... because I can't seem to find the syntax for it.

What I'm trying to do add a calculated item prototype to the mounted filesystem discovery for Linux systems so that I can create a more dynamic filesystem "full" threshold (percentage) depending on the total size of the mounted filesystem. I'd then use that calculated item in a trigger prototype to create filesystem utilization triggers.

I was trying something like this for the formula...

20-(15*(vfs.fs.size[{#FSNAME},total]/1073741824-200)/800)

But... I get all sorts of incorrect expression errors with various things I've tried... is what I'm trying to do even possible? Is there a different way to accomplish this?

[Viktors Fomics]

Hello

The main issue here is the {#FSNAME} macro, as discovery rule macros are not expanded inside calculated item expression. To make this work, a standard Zabbix agent item prototype vfs.fs.size[{#FSNAME},total] must be created under the LLD rule, and a separate calculated item must be created outside the LLD rule using a concrete filesystem (e.g. /) with the formula 20-(15*(last(/<HOSTNAME>/vfs.fs.size[/,total])/1073741824-200)/800). However, depending on the goal, this manual approach may not be applicable for you.