tracing-layer-slack

tracing-layer-slack provides a Layer implementation for sending tracing events to Slack.

Synopsis

SlackLayer sends POST requests via tokio and reqwest to a Slack Webhook URL for each new tracing event. The format of the text field is statically defined.

This layer also looks for an optional JsonStorageLayer extension on the parent span of each event. This extension may contain additional contextual information for the parent span of an event, which is included into the Slack message.

Installation

Configure the dependencies and pull directly from GitHub:

[dependencies]
tokio = "1.0"
tracing = "0.1"
tracing-futures = "0.2"
tracing-layer-slack = "0.3"

Examples

Slack Messages

Code example

use regex::Regex;
use tracing::{info, warn, instrument};
use tracing_subscriber::{layer::SubscriberExt, Registry};

use tracing_layer_slack::{EventFilters, SlackLayer};

#[instrument]
pub async fn create_user(id: u64) {
    network_io(id).await;
    info!(param = id, "A user was created");
}

#[instrument]
pub async fn network_io(id: u64) {
    warn!(user_id = id, "had to retry the request once");
}

pub async fn controller() {
    info!("Orphan event without a parent span");
    tokio::join!(create_user(2), create_user(4), create_user(6));
}

#[tokio::main]
async fn main() {
    // Only show events from where this example code is the target.
    let target_to_filter: EventFilters = Regex::new("simple").unwrap().into();

    // Initialize the layer and an async background task for sending our Slack messages.
    let (slack_layer, background_worker) = SlackLayer::builder(target_to_filter).build();
    // Initialize the global default subscriber for tracing events.
    let subscriber = Registry::default().with(slack_layer);
    tracing::subscriber::set_global_default(subscriber).unwrap();

    // Perform our application code that needs tracing and Slack messages.
    controller().await;
    // Waits for all Slack messages to be sent before exiting.
    background_worker.shutdown().await;
}