tracing/tracing-opentelemetry

![Tracing — Structured, application-level diagnostics][splash] [splash]: https://raw.githubusercontent.com/tokio-rs/tracing/master/assets/splash.svg

Tracing OpenTelemetry

Utilities for adding OpenTelemetry interoperability to tracing.

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Overview

tracing is a framework for instrumenting Rust programs to collect structured, event-based diagnostic information. This crate provides a layer that connects spans from multiple systems into a trace and emits them to OpenTelemetry-compatible distributed tracing systems for processing and visualization.

The crate provides the following types:

• OpenTelemetryLayer adds OpenTelemetry context to all tracing spans.
• OpenTelemetrySpanExt allows OpenTelemetry parent trace information to be injected and extracted from a tracing span.

Examples

Basic Usage

use opentelemetry::{api::Provider, sdk};
use tracing::{error, span};
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 = tracing_opentelemetry::layer().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.");
    });
}

Visualization example

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

# Run example to produce spans (from parent examples directory)
$ cargo run --example opentelemetry

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

License

This project is licensed under the MIT license.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in Tracing by you, shall be licensed as MIT, without any additional terms or conditions.