[kwlug-disc] Prometheus for multiple server monitoring?

[Khalid Baheyeldin]

On Fri, May 22, 2026 at 9:19 PM Adam Glauser <adamglauser at gmail.com> wrote:

> In your case, I think the Targets are the black box-exporter services.
> They are responding, so are considered up, even though the SSH service they
> are monitoring is down (probe_status=0)
>

That makes perfect sense.
Blackbox Exporter is up, but whatever it is monitoring is down.

I had to struggle to customize the email messages, and finally got that
figured out.
Though they are only HTML (not plain text).

Another thing is that it reports an outage immediately.
Nagios4 made sure that the outage persists before it reported it, tuning
out network glitches and such.

And Nagios4 had the concept of flapping, when a service keeps going down
then up.
It is not reported as down, rather it is flagged as flapping.
I can't find something like that in Prometheus.
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