The labels of an alert are its identity, so you have to be a little careful what you put in there.
Reliable Insights
A blog on monitoring, scale and operational Sanity
Prometheus has gained a number of features to limit the impact of expensive PromQL queries.
The Python client can be used to check if a given metrics output is valid OpenMetrics format.
It's nice to check that your configuration is valid before pushing to production.
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?
