gagbo / rust-prometheus-tokio

Expose tokio runtime metrics to prometheus

Prometheus + Tokio

This project exposes a Tokio collector that is compatible with the prometheus crate that adds tokio runtime related metrics.

The project relies on a tokio_unstable feature, so you need to add the flags accordingly, e.g. by adding a .cargo/config.toml file to your project with the correct RUSTFLAGS, as is done here.

You can quickly test to look at the metrics that exist by using the example app:

cargo run --example complete-setup
# In another terminal
curl 127.0.0.1/metrics

Forced feature

Due to feature unification, note that bringing this crate in your project will force the rt feature of tokio in your project. This should not be an issue, given that runtime metrics hopefully make little sense if there is no runtime to measure.

Features

The crate has a single feature:

• io_driver enables the tokio/net feature, and adds an extra metric that reports the number of ready events processed by the runtime’s I/O driver.

Acknowledgement

The project was kickstarted by Fiberplane during a "Hack day".

rust-prometheus-tokio's Issues

Add example app

Having an example app is the best way to test the design is sound, and that everything works

Remove `tokio_metrics` ??

Since we are calling the collection manually through the Collector trait, maybe we can remove the tokio_metrics middleware and directly poll and use tokio::RuntimeMetrics, by having our own min_max_sum function ?

Question, possible to combine this with 'gstreamer-tokio'

https://github.com/standard-ai/tracing-gstreamer

Hello. I don't know rust or tokio very well, but I use gstreamer a lot. I was wondering if you thought it might be feasible to combine this project with the one I linked above.

My goal is to collect latency, data rate and buffers per second coming into and leaving each gstreamer element in a prometheus format.

I am merely curious if you think it is possible or if it would make sense at all. I will attempt it myself if you do.

Or if you would like to do so as a contractor I could look into hiring you for undertaking this work.

Please close upon reading.

Best regards!