As of 2.5.0, promtool has a feature to allow you to test your recording rules.
A blog on monitoring, scale and operational Sanity
Among the Blackbox exporter's probe types is DNS.
While each application is different, a rough idea of how many metric there should be would be useful.
Ever wanted more information about Blackbox probe failures?
As of Grafana 5.3.0 there's a feature that allows correct graphing of the top N series over a duration.
It's easy to check if HTTP and HTTPS endpoints are working with the Blackbox Exporter.
The job
label is one of the labels your targets will always have. So how can you use it?
In a previous post we looked at dealing with reaching the open file limit. How about alerting before it happens?