@opencensus/propagation-b3

OpenCensus B3 Format Propagation for Node.js

OpenCensus B3 Format Propagation sends a span context on the wire in an HTTP request, allowing other services to create spans with the right context.

The library is in alpha stage and the API is subject to change.

Installation

Install OpenCensus B3 Propagation with:

npm install @opencensus/propagation-b3

Usage

To propagate span context arround services with B3 Propagation, pass an instance of B3 Propagation to your tracing instance. For Javascript:

const tracing = require('@opencensus/nodejs');
const propagation = require('@opencensus/propagation-b3');

const b3 = new propagation.B3Format();

tracing.start({propagation: b3});

Similarly for Typescript:

import * as tracing from '@opencensus/nodejs';
import { B3Format } from '@opencensus/propagation-b3';

const b3 = new B3Format();

tracing.start({propagation: b3});

Useful links

• To know more about B3 Format propagation, visit: https://github.com/openzipkin/b3-propagation
• For more information on OpenCensus, visit: https://opencensus.io/
• To checkout the OpenCensus for Node.js, visit: https://github.com/census-instrumentation/opencensus-node
• For help or feedback on this project, join us on gitter

Changelog

0.0.14 - 2019-06-04

• Exporter/Stats/Stackdriver: Add support for exemplar
• exporter-stackdriver: Add support the credentials option used for authentication instead of your application default credentials
• Update dependency @types/nock to v10
• Object Trace Exporter for programatic span access
• Update dependency axios to ^0.19.0 [SECURITY]
• Refactor resource util to match specs
• Update dependency jaeger-client to ~3.15.0
• Trace Context Propagation: return null instead of empty spancontext
• Update dependency gcp-metadata to v2
• Fix duplicate spans issue and clean up
• chore(deps): update dependency nyc to v14.1.1
• chore: add node 12 ci job