How to monitor a specific service

[cmartinez127]

Greetings,

We need to monitor a specific service only in one host. In this case we want to monitor "mailgun" service.


So we followed an old guide we found but didn't work. We did this:

First of all, we created an Item with the following values and using 'system.run["systemctl status mailgun"]' key. (We don't know if 'system.run["systemctl is-active mailgun"]' would work too, we don't have preferences, just want it to work any possible way).


However, it says "Unsopported item key".


Then we created a Trigger which obviously won't work.



Can anyone help us to monitor a specific service in a host like "mailgun"? We don't know if we were on the right track, so if the way to do this is completely different provide us a new way without any kind of problem.

Best regards.

[cyber]

I am pretty sure that "systemctl status mailgun.service | grep 'active (running)'" does not return 0 or 1 as answer (grep -c returns number of matches..) so trying to create a expression last()=0 does not work... First of all, identify, what it actually returns and then use that in your expression..

And please.. use replies to answer, not comment... It makes impossible to quote you and looks like I am talking to myself here...

[cmartinez127]

I didn't mention we are using Zabbix 5.4.6. version.

[cyber]

system.run is by default disabled. You may need to enable it first... https://www.zabbix.com/documentation...estrict_checks

By installing agent2, you could use built-in keys... systemd.unit.* https://www.zabbix.com/documentation.../zabbix_agent2

[cmartinez127]

This is great help, thanks. This "systemd.unit.info[mailgun.service]" would solve my problem. Unfortunately the device I need to monitor only allows Agent 1. It's a Zabbix Server 5.4.6. and the device to monitor an Ubuntu 22.04 (Jammy), For example, with that Zabbix Server version the previous Ubuntu version 20.04 (Focal) is compatible with Agent 2.

EDIT: I tried 'system.run["systemctl status mailgun.service"]' which works with Agent1. What's the Expression I should use to create the trigger that will warn me if service is not active?

[cyber]

As I said, system.run is by default disabled.. try to enable it (Link above) and you may get things done with agent1 also.

[cmartinez127]

Yes, I enabled it with the link above and works, now I just need the trigger Expression. I tried this:
last(/host_name_example/system.run["systemctl status mailgun.service | grep 'active (running)'"])=0

But it's not working.

EDIT: If I run the following command from Zabbix Server it works, but it isn't working when applied in the trigger, it doesn't give error messages. I try to disable mailgun service to test and it never appears an alert about this on the dashboard.
zabbix_get -s hostname_example -p 10050 -k system.run["systemctl status mailgun.service | grep 'active (running)'"]

[cyber]

I am pretty sure that "systemctl status mailgun.service | grep 'active (running)'" does not return 0 or 1 as answer (grep -c returns number of matches..) so trying to create a expression last()=0 does not work... First of all, identify, what it actually returns and then use that in your expression..

And please.. use replies to answer, not comment... It makes impossible to quote you and looks like I am talking to myself here...

[cmartinez127]

Sorry for commenting instead of replying.

Thanks to your suggestion about using "grep -c", now the following trigger expression works as expected:
last(/hostname_example/system.run["systemctl status mailgun.service | grep -c 'active (running)'"])=0