Trace Package

The trace package provides an easy-to-use utility for adding distributed tracing to Go applications using OpenTelemetry. With support for multiple trace exporters, function-level tracing, and integration with web frameworks like Gin, this package simplifies instrumentation and performance monitoring across services.

Key Features:

• Tracer Provider Initialization: Easily initialize and configure OpenTelemetry's Tracer Provider with support for multiple exporters, including: gRPC Exporter: Export traces to remote tracing backends. Stdout Exporter: Print traces to the console for local development and debugging.
• Function-Level Tracing (TraceFunc): Automatically trace the execution of any Go function, including capturing function start/end times, execution status, and errors.

Usage

1. Initialize Tracer Provider

To initialize the Tracer Provider, call InitTracerProvider with the service name and desired exporter:

ctx := context.Background()
tracerProvider, err := trace.InitTracerProvider(ctx, "my-service", nil, trace.ExporterStdout)
if err != nil {
    log.Fatalf("Failed to initialize tracer provider: %v", err)
}
defer tracerProvider.Shutdown(ctx)

You can also set the OTEL_SERVICE_NAME environment variable to override the service name dynamically. Additionally, you can set the OTEL_RESOURCE_ATTRIBUTES environment variable to specify additional resource attributes.

2. Function-Level Tracing (TraceFunc)

Wrap any function in TraceFunc to automatically trace its execution:

result, err := trace.TraceFunc(ctx, otel.Tracer("my-tracer"), func(ctx context.Context) (string, error) {
    // Simulate some processing
    time.Sleep(100 * time.Millisecond)
    return "Hello, World!", nil
})

if err != nil {
    log.Fatalf("Error executing traced function: %v", err)
}
fmt.Println("Result:", result)

Example

You can find a complete working example in the repository under framework/trace/example.