.NET [Logs] - Tracelit

1. Environment

OTEL_SERVICE_NAME=my-service
OTEL_RESOURCE_ATTRIBUTES=deployment.environment=production
OTEL_EXPORTER_OTLP_ENDPOINT=https://ingest.tracelit.app
OTEL_EXPORTER_OTLP_PROTOCOL=http/protobuf
OTEL_EXPORTER_OTLP_HEADERS=Authorization=Bearer <WORKSPACE_INGEST_KEY>

2. Packages

dotnet add package OpenTelemetry.Extensions.Hosting
dotnet add package OpenTelemetry.Exporter.OpenTelemetryProtocol
dotnet add package OpenTelemetry.Instrumentation.AspNetCore
dotnet add package OpenTelemetry.Instrumentation.Http

3. Program.cs

builder.Services.AddOpenTelemetry()
    .ConfigureResource(r => r.AddService(builder.Environment.ApplicationName))
    .WithTracing(t => t
        .AddAspNetCoreInstrumentation()
        .AddHttpClientInstrumentation()
        .AddOtlpExporter())
    .WithLogging(l => l.AddOtlpExporter());

Without WithLogging(), you get traces/metrics only — onboarding will wait forever for INFO/ERROR logs.

4. Log libraries

ILogger
Serilog

With WithLogging().AddOtlpExporter() registered, inject ILogger<T> as usual:

_logger.LogInformation("order listed {Count}", 3);
_logger.LogError(ex, "payment failed");

Install

dotnet add package Serilog.Sinks.OpenTelemetry

Configure the sink with the same OTLP endpoint, protocol (http/protobuf), and Authorization header as your tracer.

_logger.Information("order listed {Count}", 3);
_logger.Error(ex, "payment failed");

5. Verify

Produce one INFO log and one ERROR log, then confirm both in Tracelit Logs (or the onboarding live preview).