This is an example of application instrumented for Prometheus. By default it listens on port 8080 and exposes metrics on the /metrics endpoint.

Set the CPU temperature metric:

curl http://localhost:8080/cpu -d 42.0

Increment the number of errors for the sda device:

curl http://localhost:8080/hd -d sda

Usage

$ ./instrumented_app --help
usage: instrumented_app [<flags>]

Flags:
  --help                     Show context-sensitive help (also try --help-long and --help-man).
  --listen="127.0.0.1:8080"  Listen address
  --listen-metrics=""        Listen address for exposing metrics (default to 'listen' if blank)
  --basic-auth=""            Basic authentication (eg <user>:<password>)