Added OTLP

Author: mitch-b

.vscode/launch.json

@@ -8,7 +8,7 @@
       "preLaunchTask": "build",
       "program": "${workspaceFolder}/src/ConsoleApp/bin/Debug/net9.0/ConsoleApp.dll",
       "args": [],
-      "cwd": "${workspaceFolder}/src",
+      "cwd": "${workspaceFolder}/src/ConsoleApp",
       "stopAtEntry": false,
       "console": "internalConsole"
     }

src/ConsoleApp/ConsoleApp.csproj

@@ -11,6 +11,10 @@
     <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" />
     <PackageReference Include="Microsoft.Identity.Client.Extensions.Msal" />
     <PackageReference Include="Microsoft.Extensions.Http" />
+    <PackageReference Include="OpenTelemetry.Exporter.Console" />
+    <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" />
+    <PackageReference Include="OpenTelemetry.Extensions.Hosting" />
+    <PackageReference Include="OpenTelemetry.Instrumentation.Http" />
     <PackageReference Include="Serilog" />
     <PackageReference Include="Serilog.Extensions.Hosting" />
     <PackageReference Include="Serilog.Settings.Configuration" />

src/ConsoleApp/Program.cs

@@ -1,5 +1,5 @@
-// See https://aka.ms/new-console-template for more information
-
+using OpenTelemetry.Resources;
+using OpenTelemetry.Trace;
 using ConsoleApp;
 using ConsoleApp.Models.Configuration;
 using ConsoleApp.Services;
@@ -8,8 +8,16 @@
 using Microsoft.Extensions.Hosting;
 using Microsoft.Identity.Client;
 using Serilog;
+using OpenTelemetry.Logs;
 
 var builder = Host.CreateDefaultBuilder(args)
+    .ConfigureAppConfiguration((hostContext, configBuilder) =>
+    {
+        configBuilder.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);
+        configBuilder.AddUserSecrets<Program>();
+        configBuilder.AddEnvironmentVariables();
+        configBuilder.AddCommandLine(args);
+    })
     .ConfigureServices((hostContext, services) =>
     {
         services.AddHostedService<WorkerService>();
@@ -21,10 +29,23 @@
         {
             httpClient.BaseAddress = new Uri("https://graph.microsoft.com/");
         });
-    })
-    .ConfigureAppConfiguration((hostContext, configBuilder) =>
-    {
-        configBuilder.AddUserSecrets<Program>();
+
+        var otlpEndpoint = hostContext.Configuration.GetValue<string>("OpenTelemetry:OtlpEndpoint");
+
+        services.AddOpenTelemetry()
+            .WithTracing(builder =>
+            {
+                builder
+                    .SetResourceBuilder(ResourceBuilder.CreateDefault().AddService(nameof(ConsoleApp)))
+                    .AddOtlpExporter(options =>
+                    {
+                        options.Endpoint = new Uri(otlpEndpoint);
+                    });
+            })
+            .WithLogging(builder =>
+            {
+                builder.AddConsoleExporter();
+            });
     })
     .UseSerilog((context, configuration) =>
     {

src/ConsoleApp/Services/ClientCredentialService.cs

@@ -15,9 +15,11 @@ internal class ClientCredentialService(ILogger<ClientCredentialService> logger,
 {
     private readonly ILogger<ClientCredentialService> _logger = logger;
     private readonly IConfidentialClientApplication? _confidentialClientApplication = 
-        ConfidentialClientApplicationBuilder
-            .CreateWithApplicationOptions(confidentialClientApplicationOptions.Value)
-            .Build();
+        confidentialClientApplicationOptions?.Value?.ClientId is not null
+            ? ConfidentialClientApplicationBuilder
+                .CreateWithApplicationOptions(confidentialClientApplicationOptions.Value)
+                .Build()
+            : null;
 
     public async Task<string> GetAccessToken(IEnumerable<string>? scopes = null)
     {

src/ConsoleApp/appsettings.json

@@ -32,5 +32,8 @@
   "ConsoleAppSettings": {
     "EntraEnabled": false,
     "WelcomeMessage": "Hello there from appsettings.json!"
+  },
+  "OpenTelemetry": {
+    "OtlpEndpoint": "http://localhost:4317"
   }
 }

src/Directory.Packages.props

@@ -5,6 +5,10 @@
     <PackageVersion Include="Microsoft.Extensions.Configuration.UserSecrets" Version="9.0.0-rc.2.24473.5" />
     <PackageVersion Include="Microsoft.Identity.Client.Extensions.Msal" Version="4.66.1" />
     <PackageVersion Include="Microsoft.Extensions.Http" Version="9.0.0-rc.2.24473.5" />
+    <PackageVersion Include="OpenTelemetry.Exporter.Console" Version="1.9.0" />
+    <PackageVersion Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.9.0" />
+    <PackageVersion Include="OpenTelemetry.Extensions.Hosting" Version="1.9.0" />
+    <PackageVersion Include="OpenTelemetry.Instrumentation.Http" Version="1.9.0" />
     <PackageVersion Include="Serilog" Version="4.1.0" />
     <PackageVersion Include="Serilog.Extensions.Hosting" Version="8.0.0" />
     <PackageVersion Include="Serilog.Settings.Configuration" Version="8.0.4" />