metrics-bundler

A super basic server bundling metrics and exposting them

The metrics bunder is a service receiving metrics from other services bunding them for further user in prometheus and other time series databases.

Functions (read / write metrics)

First of all, writing metrics works by submitting a POST request to the /metrics endpoint:

$ url -X POST --data "key=number&value=800" https://metrics-bundler.nbg1.emile.space/metrics

After that, a GET request can be submitted to the same endpoint (/metrics). It returns all of the metrics submitted:

$ curl -X GET https://metrics-bundler.nbg1.emile.space/metrics                                                                       
number 800.000000

Prometheus integration

Prometheus can be instructed to use this by creating a new job in the prometheus configuration file:

...

  - job_name: 'metrics-bundler'
    scrape_interval: 5s
    static_configs:
      - targets: ['<hostname>:<port>']

...

Using the job a above, prometheus is instructed to scrape the /metrics endpoint of the given host every 5 seconds.