Custom LLD with UserParameter and Powershell script

[sxboxer]

Hello friends, I need some advice
Information:
Server - Zabbix 7.0
Host PC - Zabix Agent 2.0
Host PC - Windows 10

Goal: Monitoring installed on windows PCs
Tested:

I would start using a powershell script: "get_installed_apps.ps1"


$jsonOutput | ConvertTo-Json

The return value is in JSON format

[
{
"{#APPVERSION}": "12.0.40664",
"{#APPNAME}": "Microsoft Visual C++ 2013 x86 Additional Runtime - 12.0.40664".
},
{
"{#APPVERSION}": "4.80",
"{#APPNAME}": "Software602 Form Filler".
more...
]

editing zabbix.conf

UserParameter=installed.apps,powershell -NoProfile -ExecutionPolicy Bypass -File "C:\Program Files\Zabbix Agent 2\get_installed_apps.ps1"
UnsafeUserParameters=1

I created Discovery rules

• Name: Installed Applications Discovery
• Type: Zabbix agent
• Key: installed.apps

I created LLD Macro

• Macro: {#APPNAME}
• JSONPath: $.DisplayName

I created Item Prototype

• Name: Installed Application: {#APPNAME}
• Type: Zabbix agent
• Key: installed.app[{#APPNAME}]
• Type of information: Character

After these steps, I get an error value:

Cannot create item: item with the same key "installed.app[{#APPNAME}]" already exists.
Cannot create item: item with the same key "installed.app[{#APPNAME}]" already exists.

I tried really many combinations and different ways, but everything ends the same. Unfortunately, the documentation for custom LLD using powershell script doesn't exist perhaps and I have drawn from various forums but have had no success. I am asking for your help in solving this problem, thank you. zz0.tguqk9irpbfzz

[Markku]

If your discovery data already has the LLD macros (like "{#APPNAME}"), you don't use LLD macros tab for anything.

https://www.zabbix.com/documentation/current/en/manual/discovery/low_level_discovery#custom-macros

The LLD macros tab allows to specify custom low-level discovery macros.

Custom macros are useful in cases when the returned JSON does not have the required macros already defined.

Markku

[sxboxer]

Thank you very much, I really tried everything possible, but since I'm no specialist, I tried more than I needed to.

[Markku]

If your discovery data already has the LLD macros (like "{#APPNAME}"), you don't use LLD macros tab for anything.

https://www.zabbix.com/documentation/current/en/manual/discovery/low_level_discovery#custom-macros

The LLD macros tab allows to specify custom low-level discovery macros.

Custom macros are useful in cases when the returned JSON does not have the required macros already defined.

Markku

[sxboxer]

Thank you very much, I really tried everything possible, but since I'm no specialist, I tried more than I needed to.

[sxboxer]

One additional question, is there any way to resolve this message ?

[Markku]

"installed.app" vs "installed.apps"?

Markku

[sxboxer]

Unknown metric installed.app