OpenTelemetry Collector Exporter for node with grpc
This module provides exporter for web and node to be used with opentelemetry-collector - last tested with version 0.6.0.
Installation
npm install --save @opentelemetry/exporter-collector-grpc
Traces in Node - GRPC
The CollectorTraceExporter in Node expects the URL to only be the hostname. It will not work with /v1/trace
.
const { BasicTracerProvider, SimpleSpanProcessor } = require('@opentelemetry/tracing');
const { CollectorTraceExporter } = require('@opentelemetry/exporter-collector-grpc');
const collectorOptions = {
serviceName: 'basic-service',
url: '<opentelemetry-collector-url>' // url is optional and can be omitted - default is localhost:55680
};
const provider = new BasicTracerProvider();
const exporter = new CollectorTraceExporter(collectorOptions);
provider.addSpanProcessor(new SimpleSpanProcessor(exporter));
provider.register();
By default, plaintext connection is used. In order to use TLS in Node.js, provide credentials
option like so:
const fs = require('fs');
const grpc = require('grpc');
const { BasicTracerProvider, SimpleSpanProcessor } = require('@opentelemetry/tracing');
const { CollectorTraceExporter } = require('@opentelemetry/exporter-collector-grpc');
const collectorOptions = {
serviceName: 'basic-service',
url: '<opentelemetry-collector-url>', // url is optional and can be omitted - default is localhost:55680
credentials: grpc.credentials.createSsl(
fs.readFileSync('./ca.crt'),
fs.readFileSync('./client.key'),
fs.readFileSync('./client.crt')
)
};
const provider = new BasicTracerProvider();
const exporter = new CollectorTraceExporter(collectorOptions);
provider.addSpanProcessor(new SimpleSpanProcessor(exporter));
provider.register();
To see how to generate credentials, you can refer to the script used to generate certificates for tests here
The exporter can be configured to send custom metadata with each request as in the example below:
const grpc = require('grpc');
const { BasicTracerProvider, SimpleSpanProcessor } = require('@opentelemetry/tracing');
const { CollectorTraceExporter } = require('@opentelemetry/exporter-collector-grpc');
const metadata = new grpc.Metadata();
metadata.set('k', 'v');
const collectorOptions = {
serviceName: 'basic-service',
url: '<opentelemetry-collector-url>', // url is optional and can be omitted - default is localhost:55680
metadata, // // an optional grpc.Metadata object to be sent with each request
};
const provider = new BasicTracerProvider();
const exporter = new CollectorTraceExporter(collectorOptions);
provider.addSpanProcessor(new SimpleSpanProcessor(exporter));
provider.register();
Note, that this will only work if TLS is also configured on the server.
Metrics in Node - GRPC
The CollectorTraceExporter in Node expects the URL to only be the hostname. It will not work with /v1/metrics
. All options that work with trace also work with metrics.
const { MeterProvider } = require('@opentelemetry/metrics');
const { CollectorMetricExporter } = require('@opentelemetry/exporter-collector-grpc');
const collectorOptions = {
serviceName: 'basic-service',
url: '<opentelemetry-collector-url>', // url is optional and can be omitted - default is localhost:55681
};
const exporter = new CollectorMetricExporter(collectorOptions);
// Register the exporter
const meter = new MeterProvider({
exporter,
interval: 60000,
}).getMeter('example-meter');
// Now, start recording data
const counter = meter.createCounter('metric_name');
counter.add(10, { 'key': 'value' });
Running opentelemetry-collector locally to see the traces
- Go to examples/collector-exporter-node
- run
npm run docker:start
- Open page at
http://localhost:9411/zipkin/
to observe the traces
Useful links
- For more information on OpenTelemetry, visit: https://opentelemetry.io/
- For more about OpenTelemetry JavaScript: https://github.com/open-telemetry/opentelemetry-js
- For help or feedback on this project, join us on gitter
License
Apache 2.0 - See LICENSE for more information.