wait for otel detectors

backend/agents/otel-tracing.js

@@ -6,6 +6,15 @@ const { TraceIdRatioBasedSampler } = require('@opentelemetry/sdk-trace-node');
 const { OTLPTraceExporter } =  require('@opentelemetry/exporter-trace-otlp-http');
 const { getNodeAutoInstrumentations } = require('@opentelemetry/auto-instrumentations-node');
 const { diag, DiagConsoleLogger, DiagLogLevel } = require('@opentelemetry/api');
+const {
+  Detector,
+  DetectorSync,
+  IResource,
+  ResourceDetectionConfig,
+  envDetectorSync,
+  hostDetectorSync,
+  processDetectorSync,
+} = require("@opentelemetry/resources")
 // const {
 //     dockerCGroupV1Detector,
 //   } = require('@opentelemetry/resource-detector-docker');
@@ -19,6 +28,19 @@ console.log("OTEL_EXPORTER_OTLP_HEADERS: " + process.env.OTEL_EXPORTER_OTLP_HEAD
 console.log("OTEL_SERVICE_NAME: " + process.env.OTEL_SERVICE_NAME);
 
 
+// from https://github.com/open-telemetry/opentelemetry-js/issues/4638
+// this is a workaround to wait for async attributes to be resolved
+function awaitAttributes(detector){
+  return {
+    async detect(config) {
+      const resource = detector.detect(config)
+      await resource.waitForAsyncAttributes()
+
+      return resource
+    },
+  }
+}
+
 const samplePercentage = 0.05;
 
 const sdk = new opentelemetry.NodeSDK({
@@ -36,6 +58,11 @@ const sdk = new opentelemetry.NodeSDK({
             },
         }),
     ],
+    resourceDetectors: [
+      awaitAttributes(envDetectorSync),
+      awaitAttributes(processDetectorSync),
+      awaitAttributes(hostDetectorSync),
+    ],
   //resourceDetectors: [dockerCGroupV1Detector],
 });