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exporters.md

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Exporters
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{{% docs/languages/exporters/intro %}}

OTLP endpoint

To send trace data to a OTLP endpoint (like the collector or Jaeger) you'll want to use an exporter crate, such as opentelemetry-otlp:

For example, you can update the Getting Started dice server by adding the new dependency:

[dependencies]
opentelemetry-otlp = { version = "{{% version-from-registry exporter-rust-otlp %}}", features = ["grpc-tonic"] }

Next, update init_tracer_provider in dice_server.rs to configure the exporter to point at an OTLP endpoint:

use std::convert::Infallible;
use std::net::SocketAddr;
use std::sync::OnceLock;

use http_body_util::Full;
use hyper::{Method, Request, Response, body::Bytes, server::conn::http1, service::service_fn};
use hyper_util::rt::TokioIo;
use opentelemetry::global::{self, BoxedTracer};
use opentelemetry::trace::{Span, SpanKind, Status, Tracer};
use opentelemetry_otlp::SpanExporter;
use opentelemetry_sdk::{Resource, propagation::TraceContextPropagator, trace::SdkTracerProvider};
use rand::Rng;
use tokio::net::TcpListener;

// ...

fn init_tracer_provider() {
    let exporter = SpanExporter::builder()
        .with_tonic()
        .build()
        .expect("Failed to create span exporter");
    let provider = SdkTracerProvider::builder()
        .with_resource(Resource::builder().with_service_name("dice_server").build())
        .with_batch_exporter(exporter)
        .build();
    global::set_text_map_propagator(TraceContextPropagator::new());
    global::set_tracer_provider(provider);
}

To try out the OTLPTraceExporter quickly, you can run Jaeger in a docker container:

docker run -d --name jaeger \
  -e COLLECTOR_ZIPKIN_HOST_PORT=:9411 \
  -e COLLECTOR_OTLP_ENABLED=true \
  -p 6831:6831/udp \
  -p 6832:6832/udp \
  -p 5778:5778 \
  -p 16686:16686 \
  -p 4317:4317 \
  -p 4318:4318 \
  -p 14250:14250 \
  -p 14268:14268 \
  -p 14269:14269 \
  -p 9411:9411 \
  jaegertracing/all-in-one:latest

Make requests on http://localhost:8080/rolldice and check the traces on Jaeger on http://localhost:16686