Multiple Item Values in Trigger Name

[GaryBarber]

I've set up some DB monitoring that tells me when the DB has moved from one cluster node to another. I want the trigger to tell me which node it has moved from and to. ITEM.VALUE resolves just fine to the name of the current node, but ITEM.VALUE2 doesn't return the previous value.

What have I done wrong?

[Hamardaban]

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

This macro may be used with a numeric index e.g. {ITEM.VALUE<1-9>} to point to the first, second, third, etc. host in a trigger expression

[GaryBarber]

https://www.zabbix.com/documentation...ed_by_location

Can you suggest how I might fix it?

[Hamardaban]

You can create a calculated item that will store the previous value(last(#2) or prev functions).
Then use this item in your trigger expression with any harmless function (.time>0) - then its value can be referenced as you planned.