statspitter

README

StatSpitter

Wat?

This is a tiny binary Chowny threw together to simulate a high-cardinality event in Prometheus. It's extremely simple, but could be expanded as you please.

How to Run it

Build

GOOS=linux GOARCH=amd64 go build

Deploy to minikube

minikube start --cpus 4 --memory 8192
cd ksonnet
ks apply --insecure-skip-tls-verify local

If that doesn't work, it's most likely because your minikube context differs from mine. Tweak ksonnet's app.yaml and it should work.

Usage

Once it starts, statspitter will simply expose a single gauge metric named statspitter_high_card_test_gauge_vec.

There will be one "nice" series that kicks out a normal set of data points:

statspitter_high_card_test_gauge_vec{type="stable", value="foo"}

This acts as a control of sorts.

There will also be a set of series that are created at a rate of approximately 10/s:

statspitter_high_card_test_gauge_vec{type="volatile", value=<time.Now()>}

All series are perpetually set to 0.0, as values don't matter here.

If you want to turn off the explosion of series, simply run the following:

curl $(mk service ss --url)/toggle

As the endpoint implies, GET'ing this URL again will re-enabel series explosion.