How to use opentelemetry?

[askareija]

Hi, this is my first time using loco, of course i'm still getting used to it. I don't know how to use opentelemetry for tracing. In axum i'm using it like this:

let tracer_exporter = opentelemetry_otlp::SpanExporter::builder()
        .with_http()
        // .with_endpoint(otel_exporter_endpoint)
        .with_protocol(opentelemetry_otlp::Protocol::HttpBinary)
        .build()
        .context("Failed to build OTLP span exporter")?;

    let tracer_provider = SdkTracerProvider::builder()
        .with_batch_exporter(tracer_exporter)
        .with_resource(
            opentelemetry_sdk::Resource::builder()
                .with_attributes(vec![opentelemetry::KeyValue::new(
                    SERVICE_VERSION,
                    app_version.clone(),
                )])
                .build(),
        )
        .build();
    let tracer = tracer_provider.tracer("backend");

    // Create a tracing layer with the configured tracer
    let telemetry_layer = tracing_opentelemetry::layer().with_tracer(tracer);

    global::set_tracer_provider(tracer_provider);
    let filter_layer = tracing_subscriber::EnvFilter::try_from_default_env()
        .or_else(|_| tracing_subscriber::EnvFilter::try_new("info"))
        .context("Failed to create tracing filter")?;

    tracing_subscriber::registry()
        .with(filter_layer)
        .with(telemetry_layer)
        .with(tracing_subscriber::fmt::layer())
        .init();

But what about loco? I'm exporting tracing to grafana tempo btw.

[kaplanelad]

Hey @askareija, you can follow this issue: #1344

let me know if you need help