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@opentelemetry/exporter-otlp-http

OpenTelemetry Collector Exporter allows user to send collected traces to the OpenTelemetry Collector

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OpenTelemetry Collector Exporter for web and node

NPM Published Version dependencies devDependencies Apache License

This module provides exporter for web and node to be used with opentelemetry-collector - last tested with version 0.25.0.

Installation

npm install --save @opentelemetry/exporter-otlp-http

Service Name

The OpenTelemetry Collector Exporter does not have a service name configuration. In order to set the service name, use the service.name resource attribute as prescribed in the OpenTelemetry Resource Semantic Conventions.

Traces in Web

The OTLPTraceExporter in Web expects the endpoint to end in /v1/traces.

import { BatchSpanProcessor } from '@opentelemetry/sdk-trace-base';
import { WebTracerProvider } from '@opentelemetry/sdk-trace-web';
import { OTLPTraceExporter } from '@opentelemetry/exporter-otlp-http';

const collectorOptions = {
  url: '<opentelemetry-collector-url>', // url is optional and can be omitted - default is http://localhost:55681/v1/traces
  headers: {}, // an optional object containing custom headers to be sent with each request
  concurrencyLimit: 10, // an optional limit on pending requests
};

const provider = new WebTracerProvider();
const exporter = new OTLPTraceExporter(collectorOptions);
provider.addSpanProcessor(new BatchSpanProcessor(exporter, {
  // The maximum queue size. After the size is reached spans are dropped.
  maxQueueSize: 100,
  // The maximum batch size of every export. It must be smaller or equal to maxQueueSize.
  maxExportBatchSize: 10,
  // The interval between two consecutive exports
  scheduledDelayMillis: 500,
  // How long the export can run before it is cancelled
  exportTimeoutMillis: 30000,
}));

provider.register();

Metrics in Web

The OTLPMetricExporter in Web expects the endpoint to end in /v1/metrics.

import { MeterProvider } from '@opentelemetry/sdk-metrics-base';
import { OTLPMetricExporter } from '@opentelemetry/exporter-otlp-http';
const collectorOptions = {
  url: '<opentelemetry-collector-url>', // url is optional and can be omitted - default is http://localhost:55681/v1/metrics
  headers: {}, // an optional object containing custom headers to be sent with each request
  concurrencyLimit: 1, // an optional limit on pending requests
};
const exporter = new OTLPMetricExporter(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' });

Traces in Node - JSON over http

const { BasicTracerProvider, BatchSpanProcessor } = require('@opentelemetry/sdk-trace-base');
const { OTLPTraceExporter } =  require('@opentelemetry/exporter-otlp-http');

const collectorOptions = {
  url: '<opentelemetry-collector-url>', // url is optional and can be omitted - default is http://localhost:55681/v1/traces
  headers: {
    foo: 'bar'
  }, // an optional object containing custom headers to be sent with each request will only work with http
  concurrencyLimit: 10, // an optional limit on pending requests
};

const provider = new BasicTracerProvider();
const exporter = new OTLPTraceExporter(collectorOptions);
provider.addSpanProcessor(new BatchSpanProcessor(exporter, {
  // The maximum queue size. After the size is reached spans are dropped.
  maxQueueSize: 1000,
  // The interval between two consecutive exports
  scheduledDelayMillis: 30000,
}));

provider.register();

Metrics in Node

const { MeterProvider } = require('@opentelemetry/sdk-metrics-base');
const { OTLPMetricExporter } =  require('@opentelemetry/exporter-otlp-http');
const collectorOptions = {
  url: '<opentelemetry-collector-url>', // url is optional and can be omitted - default is http://localhost:55681/v1/metrics
  concurrencyLimit: 1, // an optional limit on pending requests
};
const exporter = new OTLPMetricExporter(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' });

GRPC

For GRPC please check npm-url-grpc

PROTOBUF

For PROTOBUF please check npm-url-proto

Configuration options as environment variables

Instead of providing options to OTLPMetricExporter and OTLPTraceExporter explicitly, environment variables may be provided instead.

OTEL_EXPORTER_OTLP_ENDPOINT=https://localhost:4317
# this will automatically append the version and signal path
# e.g. https://localhost:4317/v1/traces for `OTLPTraceExporter` and https://localhost:4317/v1/metrics for `OTLPMetricExporter`

If the trace and metric exporter endpoints have different providers, the env var for per-signal endpoints are available to use

OTEL_EXPORTER_OTLP_TRACES_ENDPOINT=https://trace-service:4317/v1/traces
OTEL_EXPORTER_OTLP_METRICS_ENDPOINT=https://metric-service:4317/v1/metrics
# version and signal needs to be explicit

The per-signal endpoints take precedence and overrides OTEL_EXPORTER_OTLP_ENDPOINT

For more details, see OpenTelemetry Specification on Protocol Exporter.

Running opentelemetry-collector locally to see the traces

  1. Go to examples/otlp-exporter-node
  2. run npm run docker:start
  3. Open page at http://localhost:9411/zipkin/ to observe the traces

License

Apache 2.0 - See LICENSE for more information.

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Package last updated on 05 Oct 2021

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