[otlp] Remove AppContext verification when using grpc + insecure endp…

…oints (#5486)

Co-authored-by: Mikel Blanchard <mblanchard@macrosssoftware.com>

examples/Console/TestLogs.cs

@@ -41,11 +41,6 @@ internal static object Run(LogsOptions options)
                      *
                      */
 
-                    // Adding the OtlpExporter creates a GrpcChannel.
-                    // This switch must be set before creating a GrpcChannel when calling an insecure gRPC service.
-                    // See: https://docs.microsoft.com/aspnet/core/grpc/troubleshoot#call-insecure-grpc-services-with-net-core-client
-                    AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);
-
                     var protocol = OpenTelemetry.Exporter.OtlpExportProtocol.Grpc;
 
                     if (options.Protocol.Trim().ToLower().Equals("grpc"))

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md

@@ -2,6 +2,14 @@
 
 ## Unreleased
 
+* `OtlpExporter` will no longer throw an exception (even on .NET Core 3.1)
+   when the `System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport`
+  `AppContext` switch is NOT set AND using `OtlpExportProtocol.Grpc`
+  to send to an insecure ("http") endpoint.
+  `System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport`
+  is not required to be set [when using .NET 5 or newer](https://learn.microsoft.com/aspnet/core/grpc/troubleshoot?view=aspnetcore-8.0#call-insecure-grpc-services-with-net-core-client).
+  ([#5486](https://github.com/open-telemetry/opentelemetry-dotnet/pull/5486))
+
 ## 1.8.0-rc.1
 
 Released 2024-Mar-27

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/Implementation/ExportClient/BaseOtlpGrpcExportClient.cs

@@ -20,8 +20,6 @@ protected BaseOtlpGrpcExportClient(OtlpExporterOptions options)
         Guard.ThrowIfNull(options);
         Guard.ThrowIfInvalidTimeout(options.TimeoutMilliseconds);
 
-        ExporterClientValidation.EnsureUnencryptedSupportIsEnabled(options);
-
         this.Endpoint = new UriBuilder(options.Endpoint).Uri;
         this.Headers = options.GetMetadataFromHeaders();
         this.TimeoutMilliseconds = options.TimeoutMilliseconds;

test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/IntegrationTest/IntegrationTests.cs

@@ -278,33 +278,6 @@ public void LogExportResultIsSuccess(OtlpExportProtocol protocol, string endpoin
         }
     }
 
-    [Trait("CategoryName", "CollectorIntegrationTests")]
-    [SkipUnlessEnvVarFoundFact(CollectorHostnameEnvVarName)]
-    public void ConstructingGrpcExporterFailsWhenHttp2UnencryptedSupportIsDisabledForNetcoreapp31()
-    {
-        // Adding the OtlpExporter creates a GrpcChannel.
-        // This switch must be set before creating a GrpcChannel/HttpClient when calling an insecure gRPC service.
-        // We want to fail fast so we are disabling it
-        // See: https://docs.microsoft.com/aspnet/core/grpc/troubleshoot#call-insecure-grpc-services-with-net-core-client
-        AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", false);
-
-        var exporterOptions = new OtlpExporterOptions
-        {
-            Endpoint = new Uri($"http://{CollectorHostname}:4317"),
-        };
-
-        var exception = Record.Exception(() => new OtlpTraceExporter(exporterOptions));
-
-        if (Environment.Version.Major == 3)
-        {
-            Assert.NotNull(exception);
-        }
-        else
-        {
-            Assert.Null(exception);
-        }
-    }
-
     private sealed class OpenTelemetryEventListener : EventListener
     {
         private readonly ITestOutputHelper outputHelper;

test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpExportProtocolParserTests.cs

@@ -5,7 +5,7 @@
 
 namespace OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests;
 
-public class OtlpExportProtocolParserTests : Http2UnencryptedSupportTests
+public class OtlpExportProtocolParserTests
 {
     [Theory]
     [InlineData("grpc", true, OtlpExportProtocol.Grpc)]

test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpExporterOptionsExtensionsTests.cs

@@ -12,7 +12,7 @@
 
 namespace OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests;
 
-public class OtlpExporterOptionsExtensionsTests : Http2UnencryptedSupportTests
+public class OtlpExporterOptionsExtensionsTests
 {
     [Theory]
     [InlineData("key=value", new string[] { "key" }, new string[] { "value" })]
@@ -94,14 +94,6 @@ public void GetHeaders_NoOptionHeaders_ReturnsStandardHeaders(string optionHeade
     [InlineData(OtlpExportProtocol.HttpProtobuf, typeof(OtlpHttpTraceExportClient))]
     public void GetTraceExportClient_SupportedProtocol_ReturnsCorrectExportClient(OtlpExportProtocol protocol, Type expectedExportClientType)
     {
-        if (protocol == OtlpExportProtocol.Grpc && Environment.Version.Major == 3)
-        {
-            // Adding the OtlpExporter creates a GrpcChannel.
-            // This switch must be set before creating a GrpcChannel when calling an insecure HTTP/2 endpoint.
-            // See: https://docs.microsoft.com/aspnet/core/grpc/troubleshoot#call-insecure-grpc-services-with-net-core-client
-            AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);
-        }
-
         var options = new OtlpExporterOptions
         {
             Protocol = protocol,
@@ -112,32 +104,6 @@ public void GetTraceExportClient_SupportedProtocol_ReturnsCorrectExportClient(Ot
         Assert.Equal(expectedExportClientType, exportClient.GetType());
     }
 
-    [Fact]
-    public void GetTraceExportClient_GetClientForGrpcWithoutUnencryptedFlag_ThrowsException()
-    {
-        // Adding the OtlpExporter creates a GrpcChannel.
-        // This switch must be set before creating a GrpcChannel when calling an insecure HTTP/2 endpoint.
-        // See: https://docs.microsoft.com/aspnet/core/grpc/troubleshoot#call-insecure-grpc-services-with-net-core-client
-        AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", false);
-
-        var options = new OtlpExporterOptions
-        {
-            Protocol = OtlpExportProtocol.Grpc,
-        };
-
-        var exception = Record.Exception(() => options.GetTraceExportClient());
-
-        if (Environment.Version.Major == 3)
-        {
-            Assert.NotNull(exception);
-            Assert.IsType<InvalidOperationException>(exception);
-        }
-        else
-        {
-            Assert.Null(exception);
-        }
-    }
-
     [Fact]
     public void GetTraceExportClient_UnsupportedProtocol_Throws()
     {

test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpLogExporterTests.cs

@@ -24,7 +24,7 @@
 
 namespace OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests;
 
-public class OtlpLogExporterTests : Http2UnencryptedSupportTests
+public class OtlpLogExporterTests
 {
     private static readonly SdkLimitOptions DefaultSdkLimitOptions = new();
 
@@ -111,14 +111,6 @@ public void UserHttpFactoryCalledWhenUsingHttpProtobuf()
     [Fact]
     public void AddOtlpExporterSetsDefaultBatchExportProcessor()
     {
-        if (Environment.Version.Major == 3)
-        {
-            // Adding the OtlpExporter creates a GrpcChannel.
-            // This switch must be set before creating a GrpcChannel when calling an insecure HTTP/2 endpoint.
-            // See: https://docs.microsoft.com/aspnet/core/grpc/troubleshoot#call-insecure-grpc-services-with-net-core-client
-            AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);
-        }
-
         var loggerProvider = Sdk.CreateLoggerProviderBuilder()
             .AddOtlpExporter()
             .Build();
@@ -152,7 +144,6 @@ public void AddOtlpLogExporterReceivesAttributesWithParseStateValueSetToFalse()
     {
         bool optionsValidated = false;
 
-        AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);
         var logRecords = new List<LogRecord>();
         using var loggerFactory = LoggerFactory.Create(builder =>
         {
@@ -185,7 +176,6 @@ public void AddOtlpLogExporterReceivesAttributesWithParseStateValueSetToFalse()
     [InlineData(false)]
     public void AddOtlpLogExporterParseStateValueCanBeTurnedOff(bool parseState)
     {
-        AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);
         var logRecords = new List<LogRecord>();
         using var loggerFactory = LoggerFactory.Create(builder =>
         {
@@ -231,7 +221,6 @@ public void AddOtlpLogExporterParseStateValueCanBeTurnedOffHosting(bool parseSta
     {
         var logRecords = new List<LogRecord>();
 
-        AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);
         var hostBuilder = new HostBuilder();
         hostBuilder.ConfigureLogging(logging => logging
             .AddOpenTelemetry(options => options

test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpMetricsExporterTests.cs

@@ -19,7 +19,7 @@
 namespace OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests;
 
 [Collection("EnvVars")]
-public class OtlpMetricsExporterTests : Http2UnencryptedSupportTests
+public class OtlpMetricsExporterTests : IDisposable
 {
     private static readonly KeyValuePair<string, object>[] KeyValues = new KeyValuePair<string, object>[]
     {
@@ -35,14 +35,6 @@ public OtlpMetricsExporterTests()
     [Fact]
     public void TestAddOtlpExporter_SetsCorrectMetricReaderDefaults()
     {
-        if (Environment.Version.Major == 3)
-        {
-            // Adding the OtlpExporter creates a GrpcChannel.
-            // This switch must be set before creating a GrpcChannel when calling an insecure HTTP/2 endpoint.
-            // See: https://docs.microsoft.com/aspnet/core/grpc/troubleshoot#call-insecure-grpc-services-with-net-core-client
-            AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);
-        }
-
         var meterProvider = Sdk.CreateMeterProviderBuilder()
             .AddOtlpExporter()
             .Build();
@@ -916,11 +908,10 @@ void AssertExemplars<T>(T value, Metric metric)
         }
     }
 
-    protected override void Dispose(bool disposing)
+    public void Dispose()
     {
         OtlpSpecConfigDefinitionTests.ClearEnvVars();
-
-        base.Dispose(disposing);
+        GC.SuppressFinalize(this);
     }
 
     private static void VerifyExemplars<T>(long? longValue, double? doubleValue, bool enableExemplars, Func<T, OtlpMetrics.Exemplar> getExemplarFunc, T state)

test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpTraceExporterTests.cs

@@ -19,7 +19,7 @@
 namespace OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests;
 
 [Collection("xUnitCollectionPreventingTestsThatDependOnSdkConfigurationFromRunningInParallel")]
-public class OtlpTraceExporterTests : Http2UnencryptedSupportTests
+public class OtlpTraceExporterTests
 {
     private static readonly SdkLimitOptions DefaultSdkLimitOptions = new();
 
@@ -581,14 +581,6 @@ public void ToOtlpSpanPeerServiceTest()
     [Fact]
     public void UseOpenTelemetryProtocolActivityExporterWithCustomActivityProcessor()
     {
-        if (Environment.Version.Major == 3)
-        {
-            // Adding the OtlpExporter creates a GrpcChannel.
-            // This switch must be set before creating a GrpcChannel when calling an insecure HTTP/2 endpoint.
-            // See: https://docs.microsoft.com/aspnet/core/grpc/troubleshoot#call-insecure-grpc-services-with-net-core-client
-            AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);
-        }
-
         const string ActivitySourceName = "otlp.test";
         TestActivityProcessor testActivityProcessor = new TestActivityProcessor();