Crate salvo_otel 

OpenTelemetry integration for the Salvo web framework.

This crate provides middleware for collecting metrics and distributed traces using the OpenTelemetry observability framework.

Components

Middleware	Purpose
Metrics	Collects HTTP request metrics (latency, status codes, etc.)
Tracing	Adds distributed tracing spans to requests

Metrics Example

use salvo_otel::Metrics;
use salvo_core::prelude::*;
use opentelemetry::global;
use opentelemetry_sdk::metrics::SdkMeterProvider;

// Initialize OpenTelemetry metrics provider
let provider = SdkMeterProvider::builder().build();
global::set_meter_provider(provider);

let router = Router::new()
    .hoop(Metrics::new())
    .get(my_handler);

Tracing Example

use salvo_otel::Tracing;
use salvo_core::prelude::*;
use opentelemetry::global;
use opentelemetry_sdk::trace::TracerProvider;

// Initialize OpenTelemetry tracing provider
let provider = TracerProvider::builder().build();
global::set_tracer_provider(provider);

let router = Router::new()
    .hoop(Tracing::new())
    .get(my_handler);

Collected Metrics

The Metrics middleware collects:

• http.server.request.duration - Request duration histogram
• http.server.active_requests - Number of in-flight requests
• http.server.request.body.size - Request body size
• http.server.response.body.size - Response body size

Trace Attributes

The Tracing middleware adds standard HTTP semantic conventions:

• http.method - HTTP method
• http.route - Matched route pattern
• http.status_code - Response status code
• http.url - Request URL

Read more: https://salvo.rs

Structs

Metrics

Middleware for metrics with OpenTelemetry.

Tracing

Middleware for tracing with OpenTelemetry.