Vertx OpenTelemetry

Preview

Vert.x integration with OpenTelemetry.

Vertx vertx = Vertx.vertx(new VertxOptions()
  .setTracingOptions(
    new OpenTelemetryOptions()
  )
);

You can also pass a custom OpenTelemetry allowing for greater control over the configuration.

Vertx vertx = Vertx.vertx(new VertxOptions()
  .setTracingOptions(
    new OpenTelemetryOptions(openTelemetry)
  )
);

If you only add this library, it will give you access to OpenTelemetry API with a default noop Tracer, which gives dummy values (all zeroes) for trace and span ids. The OpenTelemetry SDK is needed to get proper values.

SdkTracerProvider sdkTracerProvider = SdkTracerProvider.builder().build();
OpenTelemetry openTelemetry = OpenTelemetrySdk.builder()
  .setTracerProvider(sdkTracerProvider)
  .setPropagators(ContextPropagators.create(W3CTraceContextPropagator.getInstance()))
  .buildAndRegisterGlobal();

vertxOptions.setTracingOptions(new OpenTelemetryOptions(openTelemetry));

Tracing policy

The tracing policy defines the behavior of a component when tracing is enabled:

PROPAGATE: the component reports a span in the active trace
ALWAYS: the component reports a span in the active trace or creates a new active trace
IGNORE: the component will not be involved in any trace.

The tracing policy is usually configured in the component options.

HTTP tracing

The Vert.x HTTP server and client reports span around HTTP requests:

name: the HTTP method
tags
http.method: the HTTP method
http.url: the request URL
http.status_code: the HTTP status code (as String)

The default HTTP server tracing policy is ALWAYS, you can configure the policy with setTracingPolicy

HttpServer server = vertx.createHttpServer(new HttpServerOptions()
  .setTracingPolicy(TracingPolicy.IGNORE)
);

The default HTTP client tracing policy is PROPAGATE, you can configure the policy with setTracingPolicy

HttpClient client = vertx.createHttpClient(new HttpClientOptions()
  .setTracingPolicy(TracingPolicy.IGNORE)
);

EventBus tracing

The Vert.x EventBus reports spans around message exchanges.

The default sending policy is PROPAGATE, you can configure the policy with setTracingPolicy.

DeliveryOptions options = new DeliveryOptions().setTracingPolicy(TracingPolicy.ALWAYS);
vertx.eventBus().send("the-address", "foo", options);

Zipkin

OpenTracing