Help understanding Script Items

[benderisgreat]

I have been looking over the documentation for script items [ https://www.zabbix.com/documentation...emtypes/script ] and trying to implement an item for a while in different ways and feel I don't understand this at all.

In the documentation, parameters are made, but don't seem to be utilized IN the scripts (in this example, host isn't in the provided example script:

Use the {HOST.CONN} macro as parameter value and get a response with expanded macro:[LIST][*]Create an item with type “Script”.[*]Create a parameter:[/LIST]
[I]Name:[/I] host
[I]Value:[/I] {HOST.CONN}[LIST][*]In the [I]Script[/I] field, enter the following code:[/LIST]
var request = new CurlHttpRequest(); return request.Post("https://postman-echo.com/post", JSON.parse(value));

But the explanation of Parameters is:

Specify the variables to be passed to the script as the attribute and value pairs.

In any case, my use case is I have a discovery rule, it generates three macros, and I would like to run a calculation on one of those macros for this items value.

Name: Value Data
Type: Script
Key: some.unique.name
Prameters: { mygreatvalue : {#mygreatmacro} }
Script: return mygreatvalue <---- ? where I am lost

Generates this error: Cannot execute script: ReferenceError: identifier 'mygreatvalue' undefined


Zabbix Version 5.4beta1

[rockandstone]

Hello, I am sorry about my English.
I am trying to understand this kind of item aswell...
I had your problem and I fixed in a way, but I think it is a bad trick and I hope there could be another polished way:

Parameters: { mygreatvalue : {#mygreatmacro} }
[B]Script: return value;[/B]

And then you add a preprocessing JSONPath | $.mygreatvalue in the corresponding tab.

Have you fixed the problem yet?

[ZabbixBoy]

Hi.

As you see on the picture parameters are passed to a script as JSON string. You can parse it to an object and use for own puprose as below example shows:

var params = JSON.parse(value);
return '{"jsonrpc":"2.0","result":[{"itemid":"41832","lastvalue":' + params.boid + '}],"id":1}';

If you are passing one parameter you can get its value using "value" variable in a script, but the "value" variable is still JSON string.

[rockandstone]

Thank you. Now I understand why it didn't work properly... I had to do things in another way but I can try your solution aswell