Enriches Serilog events with Datadog trace and span ids by taken the value of them from System.Diagnostics.Activity trace and span ids for Datadog traces correlation generated from OpenTelemetry.

To use the enricher, first install the NuGet package:

Install-Package Serilog.Enrichers.Datadog.OpenTelemetry

Then, apply the enricher to your LoggerConfiguration:

Log.Logger = new LoggerConfiguration()
    .Enrich.WithDatadogTraceId()
    .Enrich.WithDatadogSpanId()
    // ...other configuration...
    .CreateLogger();

The WithDatadogTraceId() enricher will add a dd.trace_id property with the current activity trace id as value to produced events.

The WithDatadogSpanId() enricher will add a dd.span_id property with the current activity span id as value to produced events.

The package includes:

• WithDatadogTraceId() - adds a Datadog trace id to correlate logs with OpenTelemetry Datadog traces.
• WithDatadogSpanId() - adds a Datadog span id to correlate logs with OpenTelemetry Datadog spans traces.

This is a quite simple example what your Program file, in .NET 6, should contain in order for this enricher to work as expected:

var datadogConf = new DatadogConfiguration(url: builder.Configuration.GetValue<string>("Datadog:Endpoints:Logs"));

builder.Logging.ClearProviders()
    .AddSerilog(new LoggerConfiguration()
        .Enrich.FromLogContext()
        .Enrich.WithDatadogTraceId()
        .Enrich.WithDatadogSpanId()
        .WriteTo.DatadogLogs(builder.Configuration.GetValue<string>("Datadog:ApiKey"),
            service: assemblyName.Name,
            configuration: datadogConf)
        .CreateLogger());

builder.Services
    .AddOpenTelemetryTracing(options =>
    {
        options.AddAspNetCoreInstrumentation()
            .AddOtlpExporter();
    });