Is it possible to get the host name inside a trigger expression ?

[lokha]

I want to check inside the trigger expression using the host name ({HOST.NAME}). But when I try to do this, I get an error:

Invalid parameter "/1/expression": incorrect trigger expression starting from " {HOST.NAME}.str("test")".

I tried to go the roundabout way. I tried to create an Item that would store the hostname. But that also turned out to be impossible. I tried to create an Item of type Zabbix trapper which would store the value {HOST.NAME}. But when I try to do this, I get an error:

Invalid key "{HOST.NAME}" for item...

Is it possible to do what I want to do?

[lokha]

I found a crooked solution.

I created a script /usr/lib/zabbix/externalscripts/echo.sh

#!/bin/sh

echo "$@"

Then I created an Item of the External check type with this key:

echo.sh["{HOST.NAME}"]

And I can already use this Item inside the trigger expression.

But I'd be happy to hear better solutions.

[cyber]

So your wish is to create a trigger which only works if hostname contains a string "test"..?
No you cannot do that. Trigger expressions are built using items, not hosts...

https://www.zabbix.com/documentation/current/manual/appendix/macros/supported_by_location

https://www.zabbix.com/documentation/current/manual/appendix/macros/supported_by_location_user

[systemservice]

What is the reason for this limitation?
For example, in the trigger expression you can write:

find(/DNS query/net.dns.record[,{HOST.DNS},A,2,1],,"like","192.168.1.1")=0

..,and it works - the host macro {HOST.DNS} is accepted.
So why is the host macro not accepted in the place of the IP address below?

find(/DNS query/net.dns.record[,{HOST.DNS},A,2,1],,"like",{HOST.IP})=0

EDIT: I would like to delete this post.