TLS Config for OTLP Grpc Exporter

[triciamesina]

I am looking to send our application traces directly to a Grpc collector gateway without using a collector agent in my local machine. Is there a way we can configure the OTLP Grpc Exporter using the same configs in the OpenTelemetry Collector ? Specifically the TLS Configuration Settings in the collector.
I have looked in the OtlpExporterOptions but I don't see any TLS related options available.

[DenisGorchakov]

Hello everyone!
I ran into a similar issue when trying to enable TLS when transferring metrics from my .NET application to a remote opentelemetry-collector. Without using TLS, the data is transferred correctly, but if I add certificates to the receiver settings, the collector no longer receives the data.
Here is code I use:
.NET app

var meterProvider = Sdk.CreateMeterProviderBuilder()
.AddMeter("Metrics")
.AddOtlpExporter((opt, metricReaderOptions) =>
{
    opt.Endpoint = new Uri(ProductManager.ReadResource("http://IP_ADDRESS:4317")); // Now I'm trying to configure TLS on my local OpenTelemetry server, but it will be remote in production
    opt.Protocol = OtlpExportProtocol.Grpc; // Tried to change it to HttpProtobuf, but then it doesn't work at all
    opt.ExportProcessorType = ExportProcessorType.Simple;
})
.Build();

OpenTelemetry Collector receiver configuration:

receivers:
  otlp:
    protocols:
      grpc:
        endpoint: 0.0.0.0:4317
		# If uncomment part below, the telemetry is not coming from the app
        #tls:
          #client_ca_file: ca-key.pem
          #cert_file: cert.pem
          #key_file: cert-key.pem

Experts, advice please, is it possible to organize Server-Side or mutual TLS to transfer metrics from a .NET app to a remote opentelemetry-collector?