feat: add metricReader to instrumentation.ts

instrumentation.ts

@@ -5,17 +5,29 @@ export async function register() {
     process.env.NEXT_RUNTIME === "nodejs" &&
     env.APPLICATION_INSIGHTS_CONNECTION_STRING
   ) {
-    const { AzureMonitorTraceExporter } = await import(
-      "@azure/monitor-opentelemetry-exporter"
-    )
+    const { AzureMonitorTraceExporter, AzureMonitorMetricExporter } =
+      await import("@azure/monitor-opentelemetry-exporter")
     const { registerOTel } = await import("@vercel/otel")
+    const { PeriodicExportingMetricReader } = await import(
+      "@opentelemetry/sdk-metrics"
+    )
+
+    const connectionString: string = env.APPLICATION_INSIGHTS_CONNECTION_STRING
 
-    const connectionString = env.APPLICATION_INSIGHTS_CONNECTION_STRING
     const traceExporter = new AzureMonitorTraceExporter({ connectionString })
 
+    const azureMetricExporter = new AzureMonitorMetricExporter({
+      connectionString,
+    })
+    const azureMetricReader = new PeriodicExportingMetricReader({
+      exporter: azureMetricExporter,
+      exportIntervalMillis: 10000,
+    })
+
     registerOTel({
       serviceName: "scandic-web",
       traceExporter,
+      metricReader: azureMetricReader,
     })
   }
 }