I'm trying to implement apm traces instrumentation in datadog using golang and opentelemetry in fiber, but my code is not creating the child spans, it only creates the first one with the middleware. In my case I don't have direct access to datadog and the connection strings, it is managed by another team and I was instructed to use it this way:
func (z *AppTracer) Start(ctx context.Context, wg *sync.WaitGroup) {
grpcClient := otlptracegrpc.NewClient()
exporter, err := newOTLPTracerExporter(ctx, grpcClient)
if err != nil {
log.Printf("failed to create OTLP exporter: %v", err)
return
}
batchSpanProcessor := sdkTrace.NewBatchSpanProcessor(exporter)
sdkTraceProvider := sdkTrace.NewTracerProvider(
sdkTrace.WithSpanProcessor(batchSpanProcessor), sdkTrace.WithResource(z.resouce),
sdkTrace.WithSampler(sdkTrace.AlwaysSample()),
)
otel.SetTracerProvider(sdkTraceProvider)
otel.SetTextMapPropagator(
propagation.NewCompositeTextMapPropagator(propagation.TraceC ontext{},
propagation. Baggagee{}))
log.Print("Starting OpenTelemetry Tracer")
wg.Add(1)
go func() {
defer wg.Done()
<-ctx.Done()
if err := sdkTraceProvider.Shutdown(ctx); err != nil {
log.Printf("failed to shutdown OpenTelemetry Tracer: %v", err)
}
if err := exporter.Shutdown(ctx); err != nil {
log.Printf("failed to shutdown OpenTelemetry Exporter: %v", err)
}
log.Print("OpenTelemetry Tracer shutdown")
}()
}
I trynna get the context from span parent and pass to create my childs but not happens, I expect can propagte traces for all request path
