On 17/02/2021 23:01, 'Marcelo Magallón' via Prometheus Developers wrote:
Hi,
I'm trying to understand the difference in scope between
blackbox_exporter and smokeping_prober.
I was thinking of extending blackbox_exporter with
functionality similar to smokeping_prober.
In the context of BBE, the existing ping prober sends exactly one ICMP
packet per probe and the interval is controlled by the prometheus
scrape interval.
With smokeping_prober it sends ICMP packets at regular intervals and
it builds a histogram to be collected by prometheus at the scrape
interval.
For BBE, what I was thinking is allowing the user to specify a number
of ICMP packets to be sent (and an interval) so that it can present
min / max / avg / dev / loss metrics. The number and the interval
would have to be very restricted to avoid very long scrape times.
The reason for this is that I don't need the continuous pinging
functionality provided by smokeping_prober (very short interval over a
long period of time) but I also can't do with just the current BBE
functionality (relatively long interval over a long period of time).
What I'm looking for is a small number of repetitions spaced at a
comparatively long interval so that I can derive a more representative
packet loss metric (1 packet lost out of 5 over a 10 minute interval
is not the same as 1 packet loss out of 5 over 5 seconds).
Thoughts?
Is there any reason you can't use the Blackbox Exporter as it currently
is, just decreasing the scrape interval? Prometheus can scrape as
infrequently as every 2 minutes or as frequently as several times a second.
--
Stuart Clark
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