Module otel 

OpenTelemetry tracing layer with zero overhead when disabled.

This module provides OpenTelemetry distributed tracing support that can be compiled into production builds but only activated at runtime when an endpoint is configured.

Transport

Uses HTTP transport with a blocking reqwest client. This works without an async runtime context because:

• The BatchSpanProcessor spawns its own dedicated background thread
• The reqwest-blocking-client handles HTTP exports synchronously

This is important because Zebra’s tracing component initializes before the Tokio runtime starts.

Functions

layer

Creates an OpenTelemetry layer if an endpoint is configured.

Type Aliases

OtelError

Error type for OpenTelemetry layer initialization.