Hyper Instrument

Instrument services in the Hypercore ecosystem.

Supports the metrics of

• hypercore-stats
• hyperswarm-stats
• hyperdht-stats

The service registers itself with a DHT Prometheus instance, which scrapes the metrics at regular intervals.

A Grafana dashboard visualising all metrics is available (source).

Install

npm i hyper-instrument

Usage

const instrument = require('hyper-instrument')
const Hyperdht = require('hyperdht')

const scraperPublicKey = // Public key of the metrics scraper
const scraperSecret = // Secret of the metrics scraper
const prometheusAlias = // unique alias identifying this instance
const prometheusServiceName = // the name of the service

const dht = new Hyperdht()

const dhtPromClient = instrument({
  dht,
  scraperPublicKey,
  scraperSecret,
  prometheusAlias,
  prometheusServiceName
})

// You can add additional metrics
new dhtPromClient.promClient.Gauge({
  name: 'my_custom_metric',
  help: 'my custom metric help',
  collect () {
    return 1 // dummy metric
  }
})

// start the scraping
await dhtPromClient.ready()

API

const dhtPromClient = instrument(params)

Set up instrumentation.

Returns a DHT-Prom client instance.

It is possible to add additional metrics by adding them to dhtPromClient.promClient, which is a Prom-client instance.

Run await dhtPromClient.ready() to start the scraping.

params must include:

• scraperPublicKey: public key of the DHT-Prometheus scraper (hex, z32 or buffer)
• scraperSecret: secret of the DHT-Prometheus scraper (hex, z32 or buffer)
• prometheusAlias: string uniquely identifying this instance to the scraper
• prometheusServiceName: string containing the name of the service

params must also include exactly one of

• dht: a HyperDHT instance
• swarm: a Hyperswarm instance

The passed-in swarm/dht will be instrumented. It will also be used to connect with the scraper.

You should pass in swarm if your service operates at Hyperswarm level, since Hyperswarm extends HyperDHT (the Hyperswarm metrics include all HyperDHT metrics).

Optionally, params can also include:

• corestore: a Corestore instance. Passing in a Corestore will set up hypercore-stats instrumentation