Blackbox-exporter is a Prometheus exporter that probes endpoints and exposes metrics of the probe result. There are multiple guides on how to use the Blackbox-exporter, and we won’t go into that, but rather focus on newer things as Jsonnet as a templating language, the Kubernetes CustomResourceDefinition that comes with the Prometheus-operator and the open source monitoring mixin for the exporter. The goal of this post is to showcase the cool nits of Jsonnet and open source libraries to minimize boilerplate and utilize best practices and shared standards.