Function init_tracer

pub fn init_tracer<F>(
    resource: Resource,
    transform: F,
) -> Result<SdkTracerProvider, InitTracerError>
where
    F: FnOnce(TracerProviderBuilder) -> TracerProviderBuilder,

Initializes an OpenTelemetry tracer provider with OTLP exporter configuration.

This function creates a fully configured tracer provider with an OTLP exporter that reads configuration from environment variables. It supports both HTTP and gRPC protocols and allows for custom transformation of the tracer provider builder.

Environment Variables

The function reads configuration from the following environment variables:

• OTEL_EXPORTER_OTLP_TRACES_ENDPOINT / OTEL_EXPORTER_OTLP_ENDPOINT: Exporter endpoint
• OTEL_EXPORTER_OTLP_TRACES_PROTOCOL / OTEL_EXPORTER_OTLP_PROTOCOL: Protocol (grpc, http, http/protobuf)
• OTEL_EXPORTER_OTLP_TRACES_TIMEOUT / OTEL_EXPORTER_OTLP_TIMEOUT: Timeout in milliseconds
• OTEL_EXPORTER_OTLP_HEADERS / OTEL_EXPORTER_OTLP_TRACES_HEADERS: Additional headers
• OTEL_TRACES_SAMPLER: Sampling strategy configuration
• OTEL_TRACES_SAMPLER_ARG: Sampling rate for ratio-based samplers

Arguments

• resource: OpenTelemetry resource containing service metadata
• transform: Function to customize the tracer provider builder before building

Returns

A configured TracerProvider on success, or an InitTracerError on failure

Examples

use opentelemetry_sdk::Resource;
use telemetry_rust::otlp::{identity, init_tracer};

let resource = Resource::builder().build();
let tracer_provider = init_tracer(resource, identity)?;