Exporters
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Send telemetry to the OpenTelemetry Collector to make sure it’s exported correctly. Using the Collector in production environments is a best practice. To visualize your telemetry, export it to a backend such as Jaeger, Zipkin, Prometheus, or a vendor-specific backend.
Available exporters
The registry contains a list of exporters for Rust.
Among exporters, OpenTelemetry Protocol (OTLP) exporters are designed with the OpenTelemetry data model in mind, emitting OTel data without any loss of information. Furthermore, many tools that operate on telemetry data support OTLP (such as Prometheus, Jaeger, and most vendors), providing you with a high degree of flexibility when you need it. To learn more about OTLP, see OTLP Specification.
This page covers the main OpenTelemetry Rust exporters and how to set them up.
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 = "0.28.0", 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
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