Load OtlpExportProtocol from IConfigure

[minimalisticMe]

What is the question?

Hi,

I want to configure the OtlpExporter from configuration file.

The following snippet harcoded without configuration file works for me:

options.AddOtlpExporter(exporter =>
{
    exporter.Endpoint = new Uri("http://localhost:5341/ingest/otlp/v1/logs");
    exporter.Protocol = OtlpExportProtocol.HttpProtobuf;
});

However when I follow the documentation and add a json-file with the following content:

{
  "OpenTelemetry": {
    "OtlpLogging": {
      "Endpoint": "http://localhost:5341/ingest/otlp/v1/logs",
      "OtlpExportProtocol": "http/protobuf"
    },
    "OtlpTracing": {
      "Endpoint": "http://localhost:5341/ingest/otlp/v1/traces"
    }
  }
}

and add it to the code like this:

services.Configure<OtlpExporterOptions>("OtlpLogging",
    otlpConfiguration.GetSection("OpenTelemetry:OtlpLogging"));
services.Configure<OtlpExporterOptions>("OtlpTracing",
    otlpConfiguration.GetSection("OpenTelemetry:OtlpTracing"));

services.AddLogging(logging => logging.AddOpenTelemetry(options =>
{
    options.SetResourceBuilder(ResourceBuilder.CreateEmpty()
        .AddService("MyService"));

    options.IncludeScopes = true;
    options.IncludeFormattedMessage = true;

    options.AddOtlpExporter(name: "OtlpLogging", configure: null);
}));

I cannot see logs on my endpoint (Seq) anymore.
I think the issue might be in parsing OtlpExportProtocol from the json-file and I tried the following values for it without success:

• 1
• "http/protobuf"
• "HttpProtobuf"

How do I configure the OtlpExporter with json-file correctly?

Additional context

No response

[minimalisticMe]

I was using the wrong public member to map to. There is auto-mapping of enum-values from json-files.
The correct file would look like this:

{
  "OpenTelemetry": {
    "OtlpLogging": {
      "Endpoint": "http://localhost:5341/ingest/otlp/v1/logs",
      "Protocol": "HttpProtobuf"
    },
    "OtlpTracing": {
      "Endpoint": "http://localhost:5341/ingest/otlp/v1/traces"
    }
  }
}