Azure Function example #1672
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| <Project Sdk="Microsoft.NET.Sdk"> | ||
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| <PropertyGroup> | ||
| <TargetFramework>netcoreapp3.1</TargetFramework> | ||
| <AzureFunctionsVersion>v3</AzureFunctionsVersion> | ||
| </PropertyGroup> | ||
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| <ItemGroup> | ||
| <PackageReference Include="Microsoft.Azure.Functions.Extensions" Version="1.1.0" /> | ||
| <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="3.0.11" /> | ||
| </ItemGroup> | ||
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| <ItemGroup> | ||
| <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Exporter.Console\OpenTelemetry.Exporter.Console.csproj" /> | ||
| <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Extensions.Hosting\OpenTelemetry.Extensions.Hosting.csproj" /> | ||
| <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Instrumentation.Http\OpenTelemetry.Instrumentation.Http.csproj" /> | ||
| </ItemGroup> | ||
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| <ItemGroup> | ||
| <None Update="host.json"> | ||
| <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> | ||
| </None> | ||
| </ItemGroup> | ||
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| </Project> |
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| // <copyright file="MyFunction.cs" company="OpenTelemetry Authors"> | ||
| // Copyright The OpenTelemetry Authors | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| // </copyright> | ||
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| using System.Diagnostics; | ||
| using System.Net.Http; | ||
| using System.Threading.Tasks; | ||
| using Microsoft.AspNetCore.Http; | ||
| using Microsoft.AspNetCore.Mvc; | ||
| using Microsoft.Azure.WebJobs; | ||
| using Microsoft.Azure.WebJobs.Extensions.Http; | ||
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| namespace Examples.AzureFunction | ||
| { | ||
| public class MyFunction | ||
| { | ||
| private static ActivitySource activitySource = new ActivitySource("MyFunction"); | ||
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| [FunctionName("MyFunction")] | ||
| public async Task<IActionResult> Run( | ||
| [HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = null)] HttpRequest req, | ||
| ExecutionContext context) | ||
| { | ||
| using var activity = activitySource.StartActivity("MyFunction", ActivityKind.Server); | ||
| activity?.SetTag("faas.trigger", "http"); | ||
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| // TODO: Consider adding other relevant tags to the activity demonstrating the FAAS semantic conventions: | ||
| // https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/trace/semantic_conventions/faas.md | ||
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| // TODO: Figure out why this HttpClient invocation does not generate an activity. | ||
| using var client = new HttpClient(); | ||
| var response = await client.GetStringAsync("https://opentelemetry.io/"); | ||
| return new OkObjectResult(response); | ||
| } | ||
| } | ||
| } | ||
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| // <copyright file="Startup.cs" company="OpenTelemetry Authors"> | ||
| // Copyright The OpenTelemetry Authors | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| // </copyright> | ||
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| using Microsoft.Azure.Functions.Extensions.DependencyInjection; | ||
| using Microsoft.Extensions.DependencyInjection; | ||
| using OpenTelemetry; | ||
| using OpenTelemetry.Resources; | ||
| using OpenTelemetry.Trace; | ||
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| [assembly: FunctionsStartup(typeof(Examples.AzureFunction.Startup))] | ||
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| namespace Examples.AzureFunction | ||
| { | ||
| public class Startup : FunctionsStartup | ||
| { | ||
| private static TracerProvider tracerProvider; | ||
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| public override void Configure(IFunctionsHostBuilder builder) | ||
| { | ||
| // TODO: It does not appear that the OpenTelemetry.Extensions.Hosting package is compatible with Azure Functions. | ||
|
There was a problem hiding this comment. yea. its a known limitation in Function. We can try to change the usage of our hosted service to something else. Perhaps |
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| // Using it causes the following error: | ||
| // [Invalid] ServiceType: Microsoft.Extensions.Hosting.IHostedService, Lifetime: Singleton, ImplementationType: OpenTelemetry.Extensions.Hosting.Implementation.TelemetryHostedService, OpenTelemetry.Extensions.Hosting, Version = 0.2.0.909, Culture = neutral, PublicKeyToken = 7bd6737fe5b67e3c. | ||
| // builder.Services.AddOpenTelemetryTracing(builder => | ||
| // { | ||
| // builder | ||
| // .AddSource("MyFunction") | ||
| // .SetResourceBuilder(ResourceBuilder.CreateDefault().AddService("MyFunction")) | ||
| // .AddHttpClientInstrumentation() | ||
| // .AddConsoleExporter(); | ||
| // }); | ||
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| tracerProvider = Sdk.CreateTracerProviderBuilder() | ||
| .AddSource("MyFunction") | ||
| .SetResourceBuilder(ResourceBuilder.CreateDefault().AddService("MyFunction")) | ||
| .AddHttpClientInstrumentation() | ||
| .AddConsoleExporter() | ||
| .Build(); | ||
| } | ||
| } | ||
| } | ||
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| { | ||
| "version": "2.0", | ||
| "logging": { | ||
| "fileLoggingMode": "always", | ||
| "logLevel": { | ||
| "Default": "Debug" | ||
| }, | ||
| "applicationInsights": { | ||
| "samplingExcludedTypes": "Request", | ||
| "samplingSettings": { | ||
| "isEnabled": true | ||
| } | ||
| } | ||
| } | ||
| } |
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I noticed the same. The DiagnosticSource events are not triggered. I suspect this is something to do with how Functions run in some special environment? I'll try to find more on this.