This is an example of application instrumented for Prometheus. By default it
listens on port 8080 and exposes metrics on the /metrics endpoint.
The root endpoint will respond with a random delay (1 second at most).
Exposed metrics:
orders_total, a fast moving counter.order_errors_total{stage=<stage>}, a slow moving counter.user_sessions, a gauge value randomly set between 0 and 100.
$ ./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>)