chore(otel): more configurable otel options

Author: yoshinorin

.env.example

@@ -7,6 +7,7 @@ NEXT_TELEMETRY_DISABLED=1
 OTEL_EXPORTER_OTLP_TRACES_ENDPOINT=http://localhost:4318/v1/traces
 OTEL_EXPORTER_OTLP_METRICS_ENDPOINT=http://localhost:4318/v1/metrics
 OTEL_EXPORTER_OTLP_LOGS_ENDPOINT=http://localhost:4318/v1/logs
+OTEL_EXPORTER_OTLP_ENDPOINT="http://localhost:4318"
 
 ## Authentication headers
 ## Examples:
@@ -16,3 +17,4 @@ OTEL_EXPORTER_OTLP_HEADERS=
 
 ## Service name
 OTEL_SERVICE_NAME=quintet
+OTEL_SERVICE_NAMESPACE=website

src/otel/config.ts

@@ -2,7 +2,9 @@ export interface OtelConfig {
   traceEndpoint: string;
   metricEndpoint: string;
   logEndpoint: string;
+  otelEndpoint: string;
   apiKey: string;
+  serviceNamespace: string;
   serviceName: string;
 }
 
@@ -19,7 +21,9 @@ export const getOtelConfig = (): OtelConfig | null => {
   const traceEndpoint = process.env.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT;
   const metricEndpoint = process.env.OTEL_EXPORTER_OTLP_METRICS_ENDPOINT;
   const logEndpoint = process.env.OTEL_EXPORTER_OTLP_LOGS_ENDPOINT;
+  const otelEndpoint = process.env.OTEL_EXPORTER_OTLP_ENDPOINT;
   const apiKey = process.env.OTEL_EXPORTER_OTLP_HEADERS || "";
+  const serviceNamespace = process.env.OTEL_SERVICE_NAMESPACE || "website";
   const serviceName = process.env.OTEL_SERVICE_NAME || "quintet";
 
   if (traceEndpoint && metricEndpoint && logEndpoint) {
@@ -29,18 +33,21 @@ export const getOtelConfig = (): OtelConfig | null => {
     }
     if (!isValidUrl(metricEndpoint)) {
       console.warn(`Invalid metric endpoint format: ${metricEndpoint}`);
-      return null;
     }
     if (!isValidUrl(logEndpoint)) {
       console.warn(`Invalid log endpoint format: ${logEndpoint}`);
-      return null;
+    }
+    if (!isValidUrl(otelEndpoint)) {
+      console.warn(`Invalid log endpoint format: ${otelEndpoint}`);
     }
 
     return {
       traceEndpoint,
       metricEndpoint,
       logEndpoint,
+      otelEndpoint,
       apiKey,
+      serviceNamespace,
       serviceName
     };
   }

src/otel/lifecycle.ts

@@ -25,11 +25,11 @@ export function initializeOtel() {
     }
 
     process.env.OTEL_TRACES_EXPORTER = "otlp";
-    process.env.OTEL_EXPORTER_OTLP_ENDPOINT=
-    process.env.OTEL_NODE_RESOURCE_DETECTORS ="env,host,os";
+    process.env.OTEL_EXPORTER_OTLP_ENDPOINT = config.otelEndpoint;
+    process.env.OTEL_NODE_RESOURCE_DETECTORS = "env,host,os";
     process.env.OTEL_EXPORTER_OTLP_HEADERS = config.apiKey;
     process.env.OTEL_SERVICE_NAME = config.serviceName;
-    process.env.OTEL_RESOURCE_ATTRIBUTES = `service.name=${config.serviceName},service.namespace="website",service.version=${process.env.npm_package_version || "1.0.0"},deployment.environment=${process.env.NODE_ENV || "development"},service.instance.id=${process.env.HOSTNAME || process.env.COMPUTERNAME || "unknown"},host.name=${process.env.HOSTNAME || process.env.COMPUTERNAME || "localhost"}`;
+    process.env.OTEL_RESOURCE_ATTRIBUTES = `service.name=${config.serviceName},service.namespace=${config.serviceNamespace},service.version=${process.env.npm_package_version || "1.0.0"},deployment.environment=${process.env.NODE_ENV || "development"},service.instance.id=${process.env.HOSTNAME || process.env.COMPUTERNAME || "unknown"},host.name=${process.env.HOSTNAME || process.env.COMPUTERNAME || "localhost"}`;
 
     initializeNativeOtel(config);