This sample shows how to configure an NServiceBus endpoint to link OpenTelemetry traces and logs together.
Configuration
First, configure OpenTelemetry to capture NServiceBus traces:
builder.Services.AddOpenTelemetry()
.ConfigureResource(resourceBuilder => resourceBuilder.AddService(EndpointName))
.WithTracing(builder =>
{
builder.AddSource("NServiceBus.*");
builder.AddConsoleExporter();
});
In this example, all telemetry is sent to a ConsoleExporter
, but any OpenTelemetry-compliant exporter will work.
Next, connect the logs emitted by the application to the traces as follows:
builder.Logging.AddOpenTelemetry(loggingOptions =>
{
loggingOptions.IncludeFormattedMessage = true;
loggingOptions.IncludeScopes = true;
loggingOptions.ParseStateValues = true;
loggingOptions.AddConsoleExporter();
});
This will apply the OpenTelemetry logging format to all the logs. More importantly, it will correlate all logs to the active traces. This means that each log statement will include a TraceId
and SpanId
as part of the log entry.
Lastly, the NServiceBus endpoint must enable the OpenTelemetry instrumentation:
var endpointConfiguration = new EndpointConfiguration(EndpointName);
endpointConfiguration.UseSerialization<SystemJsonSerializer>();
endpointConfiguration.UseTransport(new LearningTransport());
endpointConfiguration.EnableOpenTelemetry();
builder.UseNServiceBus(endpointConfiguration);
Running the sample
When running the sample, the following log statement from the message handler:
logger.LogInformation("Received message #{Number}", message.Number);
will lead to the following output:
<div class='alert alert-primary'>MyMessageHandler[0]</div>
Received message #54
LogRecord.Timestamp: 2022-06-28T09:02:34.5342602Z
LogRecord.TraceId: 964b320925ab08cd2134c02d0abe920d
LogRecord.SpanId: 066fce94c5438add
LogRecord.TraceFlags: Recorded
LogRecord.CategoryName: MyMessageHandler
LogRecord.LogLevel: Information
LogRecord.FormattedMessage: Received message #54
LogRecord.StateValues (Key:Value):
{OriginalFormat}: Received message #54
LogRecord.ScopeValues (Key:Value):
[Scope.0]:SpanId: 066fce94c5438add
[Scope.0]:TraceId: 964b320925ab08cd2134c02d0abe920d
[Scope.0]:ParentId: e595cc6a4d9b0768
The console will also show information for the captured traces:
Activity.TraceId: 964b320925ab08cd2134c02d0abe920d
Activity.SpanId: 066fce94c5438add
Activity.TraceFlags: Recorded
Activity.ParentSpanId: eb999a0dadc477ea
Activity.ActivitySourceName: NServiceBus.Core
Activity.DisplayName: MyMessageHandler
Activity.Kind: Internal
Activity.StartTime: 2022-06-28T09:02:34.5322602Z
Activity.Duration: 00:00:00.0017675
Activity.Tags:
nservicebus.handler.handler_type: MyMessageHandler
StatusCode : Ok
Resource associated with Activity:
service.name: Samples.Hosting.GenericHost
service.instance.id: 93d66e53-7537-4e21-99f9-e62b579b5fa3