Crate tracing_loki

A tracing layer for shipping logs to Grafana Loki.

Usage

use tracing_subscriber::layer::SubscriberExt;
use tracing_subscriber::util::SubscriberInitExt;
use url::Url;

#[tokio::main]
async fn main() -> Result<(), tracing_loki::Error> {
    let (layer, task) = tracing_loki::layer(
        Url::parse("http://127.0.0.1:3100").unwrap(),
        vec![("host".into(), "mine".into())].into_iter().collect(),
        vec![].into_iter().collect(),
    )?;

    // We need to register our layer with `tracing`.
    tracing_subscriber::registry()
        .with(layer)
        // One could add more layers here, for example logging to stdout:
        // .with(tracing_subscriber::fmt::Layer::new())
        .init();

    // The background task needs to be spawned so the logs actually get
    // delivered.
    tokio::spawn(task);

    tracing::info!(
        task = "tracing_setup",
        result = "success",
        "tracing successfully set up",
    );

    Ok(())
}

Re-exports

pub extern crate url;

Structs

BackgroundTask

The background task that ships logs to Loki. It must be tokio::spawned by the calling application.

Error

The error type for constructing a Layer.

Layer

The tracing_subscriber::Layer implementation for the Loki backend.

Functions

layer

Construct a Layer and its corresponding BackgroundTask.