How to export into multiple endpoints?

[andrew-vdb]

Most of example is OTEL_EXPORTER_OTLP_ENDPOINT with single endpoint, how can we export to multiple endpoints?

[cijothomas]

Do you meant exporting each signal to a different endpoint? or sending same telemetry to multiple destinations?

[andrew-vdb]

Sending same signal to multiple destinations

[Kielek]

You should be able to add multiple instances of the exporter.
Alternative way, and probably better option to do not impact your production processes so much is to send everything to the otel-collector and then forward using as many exporters as you need.

[andrew-vdb]

but how? use environment variable separate by space?

I think az container app can do what you mention but I need it for development, instead of sending telemetry to aspire, i want to put another collector

[Kielek]

Following code taken from the examples and adjusted, it is for AspNetCore, but similar construction should working in another hosting stuff:

appBuilder.Services.AddOpenTelemetry()
    .ConfigureResource(r => r
        .AddService(
            serviceName: appBuilder.Configuration.GetValue("ServiceName", defaultValue: "otel-test"),
            serviceVersion: typeof(Program).Assembly.GetName().Version?.ToString() ?? "unknown",
            serviceInstanceId: Environment.MachineName))
    .WithTracing(builder =>
    {
        // Tracing

        // Ensure the TracerProvider subscribes to any custom ActivitySources.
        builder
            .AddSource(InstrumentationSource.ActivitySourceName)
            .SetSampler(new AlwaysOnSampler())
            .AddHttpClientInstrumentation()
            .AddAspNetCoreInstrumentation();

        // Use IConfiguration binding for AspNetCore instrumentation options.
        appBuilder.Services.Configure<AspNetCoreTraceInstrumentationOptions>(appBuilder.Configuration.GetSection("AspNetCoreInstrumentation"));

		// Here you can configure as many exportert as you need:
                builder.AddOtlpExporter("OtlpEndPoint1", otlpOptions =>
                {
                    // Use IConfiguration directly for Otlp exporter endpoint option.
                    otlpOptions.Endpoint = new Uri("http://yourendpoint1:4317"));
                });
                builder.AddOtlpExporter("OtlpEndpoint2", otlpOptions =>
                {
                    // Use IConfiguration directly for Otlp exporter endpoint option.
                    otlpOptions.Endpoint = new Uri("http://yourendpoint2:4317"));
                });

                builder.AddConsoleExporter();

    })

[andrew-vdb]

thanks!