Firing a trigger on unknown?

[davidmh]

Hello, I would like to fire a trigger (to send me an email alert) when an item changes from 0 to unknown.

That is I want to fire an email alert when a zabbix_agentd stops running in a remote host.

What is the correct way of doing it? Im trying different things but latest data remains the same as when the agent was running so i dont get an email when a host is down.

I want to avoid doing ping checks for remote hosts in another agent. I want each agent to "contain" a trigger that activates when the agent goes down.

[Alexei]

I want to avoid doing ping checks for remote hosts in another agent. I want each agent to "contain" a trigger that activates when the agent goes down.

I would suggest using of function nodata() for item agent.ping. Something similar to:


"No data from ZABBIX agent. Agent down?"
{host:agent.ping.nodata(300)}=1

[davidmh]

Thanks a lot ! it works that way.

It only has a small problem, when doing tests I kill the zabbix agent, so the email is sent with the text:

No data from agent: ON

And when i restart the agent, the alarm goes off in the overview and the email i receive is:

No data from agent: ON

And i think it should be: No data from agent: OFF

Leaving that small bug apart it works great