Monitoring of "no data"

[Rudolf]

Hi Forum,

Is there a way how to monitor zabbix itself? Let's say I monitor the free memory on a linux server. And a graph draws the line with the amount. When there is a communication problem between the zabbix server and the client, then the line stops and nothing is displayed.

My question is, how I could monitor zabbix for "no data". Of course I can test the hosts with ping, but that's not what I need. I really want to know, when zabbix can't store collected values in the database. So far the only way I found is to check zabbix_server.log for words like "Timeout" or "error".

[Alexei]

You may use function nodata(). See ZABBIX Manual for more details.

[Rudolf]

Yes, this seems to work. Thanks for your answer.

[crayons]

Yeah nodata is nice, but it would be nice if you could do {{HOSTNAME}:{TRIGGER.KEY}.nodata(86400)}=1 as a generic trigger. That way you could monitor that all your scripts are working properly then have zabbix e-mail you when it hasn't received data from an item within a day or whatever. I guess you could do this for every host / trigger you have and get the same effect, but that would take some effort.