Function getTracer

apps/webapp/app/v3/tracer.server.ts:79–153

()

export const tracer = singleton("tracer", getTracer);

function getTracer() {
  if (env.INTERNAL_OTEL_TRACE_DISABLED === "1") {
    console.log(`🔦 Tracer disabled, returning a noop tracer`);

    return trace.getTracer("trigger.dev", "3.0.0.dp.1");
  }

  diag.setLogger(new DiagConsoleLogger(), DiagLogLevel.ERROR);

  const samplingRate = 1.0 / Math.max(parseInt(env.INTERNAL_OTEL_TRACE_SAMPLING_RATE, 10), 1);

  const provider = new NodeTracerProvider({
    forceFlushTimeoutMillis: 500,
    resource: new Resource({
      [SEMRESATTRS_SERVICE_NAME]: env.SERVICE_NAME,
    }),
    sampler: new ParentBasedSampler({
      root: new CustomWebappSampler(new TraceIdRatioBasedSampler(samplingRate)),
    }),
  });

  if (env.INTERNAL_OTEL_TRACE_EXPORTER_URL) {
    const exporter = new OTLPTraceExporter({
      url: env.INTERNAL_OTEL_TRACE_EXPORTER_URL,
      timeoutMillis: 10_000,
      headers:
        env.INTERNAL_OTEL_TRACE_EXPORTER_AUTH_HEADER_NAME &&
        env.INTERNAL_OTEL_TRACE_EXPORTER_AUTH_HEADER_VALUE
          ? {
              [env.INTERNAL_OTEL_TRACE_EXPORTER_AUTH_HEADER_NAME]:
                env.INTERNAL_OTEL_TRACE_EXPORTER_AUTH_HEADER_VALUE,
            }
          : undefined,
    });

    provider.addSpanProcessor(
      new BatchSpanProcessor(exporter, {
        maxExportBatchSize: 512,
        scheduledDelayMillis: 1000,
        exportTimeoutMillis: 30000,
        maxQueueSize: 2048,
      })
    );

    console.log(
      `🔦 Tracer: OTLP exporter enabled to ${env.INTERNAL_OTEL_TRACE_EXPORTER_URL} (sampling = ${samplingRate})`
    );
  } else {
    if (env.INTERNAL_OTEL_TRACE_LOGGING_ENABLED === "1") {
      console.log(`🔦 Tracer: Logger exporter enabled (sampling = ${samplingRate})`);

      const loggerExporter = new LoggerSpanExporter();

      provider.addSpanProcessor(new SimpleSpanProcessor(loggerExporter));
    }
  }

  provider.register();