HAProxy plugin with prometheus exporter enabled

[svs]

I'm somewhat new to OPNsense. I am trying to use prometheus to collect metrics from HAProxy. Unfortunately, the default haproxy plugin does not have the built-in prometheus exporter enabled, as described in https://github.com/haproxy/haproxy/tree/master/addons/promex .

Is there a version of the haproxy plugin with promex enabled that I can use?
Thanks!

[svs]

Opened a ticket to have this included:
https://github.com/opnsense/tools/issues/230

[henningkessler]

Hi there,

your ticket has been closed. Is the promex now build into HAProxy? And if so how did you configure it as there seams to be no GUI for it?

Henning

[svs]

Updated to v21.7.1 and confirm the HAProxy built-in Prometheus exporter (promex) is working well now.

You can find a description how to set this up here:
https://www.haproxy.com/blog/haproxy-exposes-a-prometheus-metrics-endpoint/#configuring-prometheus
https://forum.netgate.com/topic/153766/haproxy-2-0-prometheus-monitoring-how-to

I added a Public Service through the GUI, which resulted in this config:

Code Select Expand

# Frontend: Prometheus (Prometheus metrics exporter)
frontend Prometheus
    bind *:9105 name *:9105
    mode http
    option http-keep-alive
    # tuning options
    maxconn 10
    timeout client 30s

    # logging options
    option dontlog-normal
    # WARNING: pass through options below this line
    option http-use-htx
    http-request use-service  prometheus-exporter if { path /metrics }

Hope it helps!

[henningkessler]

Yes, helps a lot. Thank you!!

[fraenki]

os-haproxy version 3.12 will include GUI options to enable the Prometheus exporter:
https://github.com/opnsense/plugins/issues/2764#issuecomment-1287528782