promtool
Minimal docker image for running the promtool utility for validating prometheus config files.
Why?
We currently keep all prometheus config files under source control at (https://github.com/eeveebank/monitoring-resources).
We want to use CircleCI to make sure that nobody breaks our monitoring pipeline by pushing an invalid config file.
Prometheus has a nice utility called promtool which can be used to check that a config/rules file is valid, but to use it, we need to build it ourselves.