From 13adec82bb2ab333de6ceac2cb6ce05341779db1 Mon Sep 17 00:00:00 2001
From: Jan Calanog <jan.calanog@elastic.co>
Date: Fri, 14 Nov 2025 16:57:38 +0100
Subject: [PATCH] Use EDOT sdk

---
 .../Elastic.Documentation.ServiceDefaults.csproj  |  1 +
 .../Extensions.cs                                 | 15 ++++++++++++---
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/Elastic.Documentation.ServiceDefaults/Elastic.Documentation.ServiceDefaults.csproj b/src/Elastic.Documentation.ServiceDefaults/Elastic.Documentation.ServiceDefaults.csproj
index 1091489a9..5462e763c 100644
--- a/src/Elastic.Documentation.ServiceDefaults/Elastic.Documentation.ServiceDefaults.csproj
+++ b/src/Elastic.Documentation.ServiceDefaults/Elastic.Documentation.ServiceDefaults.csproj
@@ -9,6 +9,7 @@
 
   <ItemGroup>
     <FrameworkReference Include="Microsoft.AspNetCore.App"/>
+    <PackageReference Include="Elastic.OpenTelemetry" />
 
     <PackageReference Include="Microsoft.Extensions.Http.Resilience"/>
     <PackageReference Include="Microsoft.Extensions.ServiceDiscovery"/>
diff --git a/src/Elastic.Documentation.ServiceDefaults/Extensions.cs b/src/Elastic.Documentation.ServiceDefaults/Extensions.cs
index 3ba8f44e4..3d795a3b3 100644
--- a/src/Elastic.Documentation.ServiceDefaults/Extensions.cs
+++ b/src/Elastic.Documentation.ServiceDefaults/Extensions.cs
@@ -47,7 +47,7 @@ public static TBuilder ConfigureOpenTelemetry<TBuilder>(this TBuilder builder) w
 			logging.IncludeScopes = true;
 		});
 
-		_ = builder.Services.AddOpenTelemetry()
+		_ = builder.Services.AddElasticOpenTelemetry()
 			.WithMetrics(metrics =>
 			{
 				_ = metrics.AddAspNetCoreInstrumentation()
@@ -79,8 +79,17 @@ private static TBuilder AddOpenTelemetryExporters<TBuilder>(this TBuilder builde
 	{
 		var useOtlpExporter = !string.IsNullOrWhiteSpace(builder.Configuration["OTEL_EXPORTER_OTLP_ENDPOINT"]);
 
-		if (useOtlpExporter)
-			_ = builder.Services.AddOpenTelemetry().UseOtlpExporter();
+		if (!useOtlpExporter)
+			return builder;
+
+		// Configure delta temporality for Elasticsearch compatibility
+		// See: https://www.elastic.co/docs/reference/opentelemetry/compatibility/limitations#histograms-in-delta-temporality-only
+		_ = builder.Services.Configure<MetricReaderOptions>(options =>
+		{
+			options.TemporalityPreference = MetricReaderTemporalityPreference.Delta;
+		});
+
+		_ = builder.Services.AddOpenTelemetry().UseOtlpExporter();
 
 		// Uncomment the following lines to enable the Azure Monitor exporter (requires the Azure.Monitor.OpenTelemetry.AspNetCore package)
 		//if (!string.IsNullOrEmpty(builder.Configuration["APPLICATIONINSIGHTS_CONNECTION_STRING"]))