Tracing OpenTelemetry

An OpenTelemetry layer for the tracing library.

Tracers

Currently supports the Jaeger exporter via opentelemetry-jaeger and Zipkin via opentelemetry-zipkin.

Examples

Basic Usage

#[macro_use]
extern crate tracing;

use opentelemetry::{api::Provider, sdk};
use tracing_opentelemetry::OpenTelemetryLayer;
use tracing_subscriber::layer::SubscriberExt;
use tracing_subscriber::Registry;

fn main() {
    // Create a new tracer
    let tracer = sdk::Provider::default().get_tracer("component_name");

    // Create a new OpenTelemetry tracing layer
    let telemetry = OpenTelemetryLayer::with_tracer(tracer);

    let subscriber = Registry::default().with(telemetry);

    // Trace executed code
    tracing::subscriber::with_default(subscriber, || {
        let root = span!(tracing::Level::TRACE, "app_start", work_units = 2);
        let _enter = root.enter();

        error!("This event will be logged in the root span.");
    });
}

Execute report.rs example

# Run jaeger in background
$ docker run -d -p6831:6831/udp -p6832:6832/udp -p16686:16686 jaegertracing/all-in-one:latest

# Report example spans
$ cargo run --example report

# View spans (see the image below)
$ firefox http://localhost:16686/

References

• OpenTelemetry