Share your code. npm Orgs help your team discover, share, and reuse code. Create a free org »

shimo-opentracing-auto

1.8.1 • Public • Published

opentracing-auto

Build Status

Out of the box distributed tracing for Node.js applications with OpenTracing. Support multiple Tracers.

WARNING: experimental library, do not use in production yet

Technologies

Requirements

  • Node.js, >= v8

Getting started

npm install shimo-opentracing-auto
// must be in the first two lines of your application
const Instrument = require('shimo-opentracing-auto')
const { Tracer } = require('opentracing') // or any OpenTracing compatible tracer like jaeger-client
const tracer1 = new Tracer()
const tracer2 = new Tracer()
 
const instrument = new Instrument({
  tracers: [tracer1, tracer2]
})
 
// rest of your code
const express = require('express')
// ...

This package depends on require-in-the-middle and shimmer to monkeypatch tracing information onto the modules listed below. Therefore it is crucial that you require() supported modules after creating the tracing instrument.

If you are using node 8.5+'s experimental module support, you will need to manually hook supported modules:

import Instrument from 'shimo-opentracing-auto';
import jaeger from 'jaeger-client';
import UDPSender from 'jaeger-client/dist/src/reporters/udp_sender';
import http from 'http';
 
const instrument = new Instrument({
  tracers: [
    new jaeger.Tracer(
      'my-service-name',
      new jaeger.RemoteReporter(new UDPSender.default({ host: 'my-jaeger-host' })),
      new jaeger.RateLimitingSampler(1),
      {}
    ),
  ],
});
 
instrument.hookModule(http, 'http');

Examples

API

new Instrument({ tracers: [tracer1, tracer2] })

Instrument modules.

  • tracers: Array of OpenTracing compatible tracers
    • required
  • httpTimings: Adds HTTP timings (DNS lookup, Connect, TLS, Time to first byte, Content transfer)
    • default: false

instrument.unpatch()

Unpatch instrumentations

Instrumentations

Example

The example require a running MongoDB and Jaeger.

To start Jaeger and visit it's dashboard:

docker run -d -p5775:5775/udp -p6831:6831/udp -p6832:6832/udp -p5778:5778 -p16686:16686 -p14268:14268 jaegertracing/all-in-one:latest && open http://localhost:16686
npm run example
curl http://localhost:3000
open http://localhost:16686

Jaeger Node.js tracing

HTTP timings

You can enable it with the httpTimings: true

HTTP timings

Debug

Start your application with the DEBUG=opentracing-auto* environment variable.

Feature ideas

  • More database instrumentation: Redis etc.
  • More messaging layer instrumentation: HTTP/2, GRPC, RabbitMQ, Kafka etc.

install

npm i shimo-opentracing-auto

Downloadsweekly downloads

15

version

1.8.1

license

MIT

homepage

github.com

repository

Gitgithub

last publish

collaborators

  • avatar