Exporters
In order to visualize and analyze your traces and metrics, you will need to export them to a backend such as Jaeger or Zipkin. OpenTelemetry JS provides exporters for some common open source backends.
Below you will find some introductions on how to setup backends and the matching exporters.
OTLP endpoint or Collector
To send trace data to a Collector you’ll want to use an exporter package, such as @opentelemetry/exporter-trace-otlp-http:
$ npm install --save @opentelemetry/exporter-trace-otlp-http
Next, configure the exporter to point at and endpoint.
For example, here’s how to point at an instance of an OpenTelemetry Collector:
const { OTLPTraceExporter } = require('@opentelemetry/exporter-trace-otlp-http');
const { SimpleSpanProcessor } = require('@opentelemetry/tracing');
const exporter = new OTLPTraceExporter({
// optional - url default value is http://localhost:55681/v1/traces
url: '<your-collector-endpoint>/v1/traces',
// optional - collection of custom headers to be sent with each request, empty by default
headers: {},
});
Use environment variables to set values like headers and an endpoint URL for production.
Jaeger
To set up Jaeger as quickly as possible, run it in a docker container:
$ docker run -d --name jaeger \
-e COLLECTOR_ZIPKIN_HOST_PORT=:9411 \
-p 5775:5775/udp \
-p 6831:6831/udp \
-p 6832:6832/udp \
-p 5778:5778 \
-p 16686:16686 \
-p 14268:14268 \
-p 14250:14250 \
-p 9411:9411 \
jaegertracing/all-in-one:latest
Install the exporter package as a dependency for your application:
npm install --save @opentelemetry/exporter-jaeger
Update your opentelemetry configuration to use the exporter and to send data to your jaeger backend:
const { JaegerExporter } = require("@opentelemetry/exporter-jaeger");
const { BatchSpanProcessor } = require("@opentelemetry/sdk-trace-base");
provider.addSpanProcessor(new BatchSpanProcessor(new JaegerExporter()))
Zipkin
To set up Zipkin as quickly as possible, run it in a docker container:
docker run --rm -d -p 9411:9411 --name zipkin openzipkin/zipkin
Install the exporter package as a dependency for your application:
npm install --save @opentelemetry/exporter-zipkin
Update your opentelemetry configuration to use the exporter and to send data to your zipkin backend:
const { ZipkinExporter } = require("@opentelemetry/exporter-zipkin");
const { BatchSpanProcessor } = require("@opentelemetry/sdk-trace-base");
provider.addSpanProcessor(new BatchSpanProcessor(new ZipkinExporter()))
Prometheus
To set up Prometheus as quickly as possible, run it in a docker container.
You will need a prometheus.yml to configure the backend, use the following example
and modify it to your needs:
global:
scrape_interval: 15s
evaluation_interval: 15s
scrape_configs:
- job_name: "prometheus"
static_configs:
- targets: ["localhost:9090"]
With this file you can now start the docker container:
docker run \
-p 9090:9090 \
-v ${PWD}/prometheus.yml:/etc/prometheus/prometheus.yml \
prom/prometheus
Install the exporter package as a dependency for your application:
npm install --save @opentelemetry/exporter-prometheus
Update your opentelemetry configuration to use the exporter and to send data to your prometheus backend:
const { PrometheusExporter } = require('@opentelemetry/exporter-prometheus');
const { MeterProvider } = require('@opentelemetry/metrics');
const meter = new MeterProvider({
exporter: new PrometheusExporter({port: 9090}),
interval: 1000,
}).getMeter('prometheus');