Module otel 

OpenTelemetry integration for distributed tracing

This module provides OpenTelemetry support with OTLP export for distributed tracing. It implements W3C Trace Context propagation (traceparent/tracestate headers).

Features

• W3C Trace Context header propagation
• OTLP export to Jaeger, Tempo, or any OTLP-compatible backend
• Configurable sampling rates
• Request lifecycle spans with semantic conventions

Configuration

observability {
    tracing {
        backend "otlp" {
            endpoint "http://localhost:4317"
        }
        sampling-rate 0.1  // 10% of requests
        service-name "grapsus"
    }
}

Structs

OtelTracer

RequestSpan

TraceContext

Parsed W3C Trace Context

Enums

OtelError

OpenTelemetry error types

Constants

TRACEPARENT_HEADER

W3C Trace Context header names

TRACESTATE_HEADER

Functions

create_traceparent

Create a traceparent header value

generate_span_id

Generate a new span ID (16 hex chars)

generate_trace_id

Generate a new trace ID (32 hex chars)

get_tracer

Get the global tracer

init_tracer

Initialize the global tracer

shutdown_tracer

Shutdown the global tracer