Cleanup and metrics

Author: marchermans

SmithingTable/Program.cs

@@ -1,4 +1,5 @@
 using Microsoft.AspNetCore.HttpLogging;
+using OpenTelemetry.Metrics;
 using SmithingTable.HealthChecks;
 using SmithingTable.Services;
 using SmithingTable.Worker;
@@ -17,6 +18,23 @@
 builder.Services.AddHttpLogging(logging => { logging.LoggingFields = HttpLoggingFields.RequestPath | HttpLoggingFields.ResponseStatusCode ; });
 builder.Services.AddHealthChecks()
     .AddCheck<ParchmentVersionUpdaterHealthCheck>("Maven");
+builder.Services.AddOpenTelemetry()
+    .WithMetrics(metricsBuilder =>
+    {
+        metricsBuilder.AddPrometheusExporter();
+
+        metricsBuilder.AddMeter("Microsoft.AspNetCore.Hosting",
+            "Microsoft.AspNetCore.Server.Kestrel");
+        metricsBuilder.AddView("http.server.request.duration",
+            new ExplicitBucketHistogramConfiguration
+            {
+                Boundaries =
+                [
+                    0, 0.005, 0.01, 0.025, 0.05,
+                    0.075, 0.1, 0.25, 0.5, 0.75, 1, 2.5, 5, 7.5, 10
+                ]
+            });
+    });
 
 var app = builder.Build();
 
@@ -30,5 +48,6 @@
 
 app.MapControllers();
 app.MapHealthChecks("/health");
+app.MapPrometheusScrapingEndpoint();
 
 app.Run();

SmithingTable/SmithingTable.csproj

@@ -13,4 +13,9 @@
       </Content>
     </ItemGroup>
 
+    <ItemGroup>
+      <PackageReference Include="OpenTelemetry.Exporter.Prometheus.AspNetCore" Version="1.10.0-beta.1" />
+      <PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.10.0" />
+    </ItemGroup>
+
 </Project>