Add YARP Telemetry instrumentation

src/ReverseProxy/Configuration/DependencyInjection/BuilderExtensions/IReverseProxyBuilderExtensions.cs

@@ -4,8 +4,6 @@
 using Microsoft.AspNetCore.Routing;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.DependencyInjection.Extensions;
-using Microsoft.ReverseProxy.Abstractions.Telemetry;
-using Microsoft.ReverseProxy.Abstractions.Time;
 using Microsoft.ReverseProxy.RuntimeModel;
 using Microsoft.ReverseProxy.Service;
 using Microsoft.ReverseProxy.Service.Config;
@@ -15,21 +13,13 @@
 using Microsoft.ReverseProxy.Service.Proxy.Infrastructure;
 using Microsoft.ReverseProxy.Service.Routing;
 using Microsoft.ReverseProxy.Service.SessionAffinity;
-using Microsoft.ReverseProxy.Telemetry;
 using Microsoft.ReverseProxy.Utilities;
 using System.Linq;
 
 namespace Microsoft.ReverseProxy.Configuration.DependencyInjection
 {
     internal static class IReverseProxyBuilderExtensions
     {
-        public static IReverseProxyBuilder AddTelemetryShims(this IReverseProxyBuilder builder)
-        {
-            // NOTE: Consumers of ReverseProxy are expected to replace these with their own classes
-            builder.Services.TryAddSingleton(typeof(IOperationLogger<>), typeof(TextOperationLogger<>));
-            return builder;
-        }
-
         public static IReverseProxyBuilder AddConfigBuilder(this IReverseProxyBuilder builder)
         {
             builder.Services.TryAddSingleton<IConfigValidator, ConfigValidator>();
@@ -43,7 +33,6 @@ public static IReverseProxyBuilder AddRuntimeStateManagers(this IReverseProxyBui
             builder.Services.TryAddSingleton<IDestinationManagerFactory, DestinationManagerFactory>();
             builder.Services.TryAddSingleton<IClusterManager, ClusterManager>();
             builder.Services.TryAddSingleton<IRouteManager, RouteManager>();
-            builder.Services.TryAddSingleton<IUptimeClock, UptimeClock>();
             builder.Services.TryAddSingleton<ITimerFactory, TimerFactory>();
             return builder;
         }
@@ -64,13 +53,6 @@ public static IReverseProxyBuilder AddProxy(this IReverseProxyBuilder builder)
             return builder;
         }
 
-        public static IReverseProxyBuilder AddBackgroundWorkers(this IReverseProxyBuilder builder)
-        {
-            builder.Services.TryAddSingleton<IMonotonicTimer, MonotonicTimer>();
-
-            return builder;
-        }
-
         public static IReverseProxyBuilder AddSessionAffinityProvider(this IReverseProxyBuilder builder)
         {
             builder.Services.TryAddEnumerable(new[] {

src/ReverseProxy/Configuration/DependencyInjection/ReverseProxyServiceCollectionExtensions.cs

@@ -9,6 +9,7 @@
 using Microsoft.ReverseProxy.Configuration.DependencyInjection;
 using Microsoft.ReverseProxy.Service;
 using Microsoft.ReverseProxy.Service.Proxy;
+using Microsoft.ReverseProxy.Utilities;
 
 namespace Microsoft.Extensions.DependencyInjection
 {
@@ -23,6 +24,7 @@ public static class ReverseProxyServiceCollectionExtensions
         /// </summary>
         public static IServiceCollection AddHttpProxy(this IServiceCollection services)
         {
+            services.TryAddSingleton<IUptimeClock, UptimeClock>();
             services.TryAddSingleton<IHttpProxy, HttpProxy>();
             return services;
         }
@@ -34,15 +36,13 @@ public static IReverseProxyBuilder AddReverseProxy(this IServiceCollection servi
         {
             var builder = new ReverseProxyBuilder(services);
             builder
-                .AddTelemetryShims()
                 .AddConfigBuilder()
                 .AddRuntimeStateManagers()
                 .AddConfigManager()
                 .AddSessionAffinityProvider()
                 .AddActiveHealthChecks()
                 .AddPassiveHealthCheck()
-                .AddProxy()
-                .AddBackgroundWorkers();
+                .AddProxy();
 
             services.AddDataProtection();
             services.AddAuthorization();

src/ReverseProxy/Microsoft.ReverseProxy.csproj

@@ -5,6 +5,7 @@
     <TargetFrameworks>net5.0;netcoreapp3.1</TargetFrameworks>
     <OutputType>Library</OutputType>
     <RootNamespace>Microsoft.ReverseProxy</RootNamespace>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
 
   <ItemGroup>

src/ReverseProxy/Middleware/ProxyInvokerMiddleware.cs

@@ -2,12 +2,9 @@
 // Licensed under the MIT License.
 
 using System;
-using System.Text;
-using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Http;
 using Microsoft.Extensions.Logging;
-using Microsoft.ReverseProxy.Abstractions.Telemetry;
 using Microsoft.ReverseProxy.Service.Proxy;
 using Microsoft.ReverseProxy.Utilities;
 
@@ -21,19 +18,16 @@ internal class ProxyInvokerMiddleware
         private readonly IRandomFactory _randomFactory;
         private readonly RequestDelegate _next; // Unused, this middleware is always terminal
         private readonly ILogger _logger;
-        private readonly IOperationLogger<ProxyInvokerMiddleware> _operationLogger;
         private readonly IHttpProxy _httpProxy;
 
         public ProxyInvokerMiddleware(
             RequestDelegate next,
             ILogger<ProxyInvokerMiddleware> logger,
-            IOperationLogger<ProxyInvokerMiddleware> operationLogger,
             IHttpProxy httpProxy,
             IRandomFactory randomFactory)
         {
             _next = next ?? throw new ArgumentNullException(nameof(next));
             _logger = logger ?? throw new ArgumentNullException(nameof(logger));
-            _operationLogger = operationLogger ?? throw new ArgumentNullException(nameof(operationLogger));
             _httpProxy = httpProxy ?? throw new ArgumentNullException(nameof(httpProxy));
             _randomFactory = randomFactory ?? throw new ArgumentNullException(nameof(randomFactory));
         }
@@ -85,9 +79,7 @@ public async Task Invoke(HttpContext context)
                 cluster.ConcurrencyCounter.Increment();
                 destination.ConcurrencyCounter.Increment();
 
-                await _operationLogger.ExecuteAsync(
-                    "ReverseProxy.Proxy",
-                    () => _httpProxy.ProxyAsync(context, destinationConfig.Address, reverseProxyFeature.ClusterConfig.HttpClient, proxyOptions));
+                await _httpProxy.ProxyAsync(context, destinationConfig.Address, reverseProxyFeature.ClusterConfig.HttpClient, proxyOptions);
             }
             finally
             {

src/ReverseProxy/Service/HealthChecks/ActiveHealthCheckMonitor.cs

@@ -4,13 +4,11 @@
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 using Microsoft.ReverseProxy.Abstractions;
-using Microsoft.ReverseProxy.Abstractions.Telemetry;
 using Microsoft.ReverseProxy.RuntimeModel;
 using Microsoft.ReverseProxy.Service.Management;
 using Microsoft.ReverseProxy.Utilities;
 using System;
 using System.Collections.Generic;
-using System.Net;
 using System.Net.Http;
 using System.Runtime.ExceptionServices;
 using System.Threading;