Blog Marcina Bojko

The need

The Foreman is a nice open-source ENC (External Node Classifier) for multiple executors (Ansible, Puppet, Chef, Saltstack) and it’s slowly going to be executor-agnostic: https://www.theforeman.org/

Since internal prometheus client exposes only data about application itself, I’ve found useful to also expose statuses and labels of managed hosts into Prometheus, thus foreman-exporter was born: https://github.com/marcinbojko/foreman_exporter

Queries

Let’s try our query about hosts statuses:

count(foreman_exporter_hosts) by (global_label, configuration_label)

Adding operating system to the tables

count(foreman_exporter_hosts) by (global_label, configuration_label,operatingsystem)

Or just these with not „OK” statuses, divided by operating system

count(foreman_exporter_hosts {global_label!="OK"}) by (operatingsystem)