NL.Serverless.AspNetCore.AzureFunctionsHost 3.0.8

NL.Serverless.AspNetCore

This repo provides code for hosting an AspNet Core App inside an Azure Function V3 HTTP Trigger without the use of TestServer.

I combined the solution of <a href="https://github.com/NicklausBrain">NicklausBrain</a> (original repo can be found <a href="https://github.com/NicklausBrain/serverless-core-api">here</a>) with the <a href="https://docs.microsoft.com/en-US/azure/azure-functions/functions-dotnet-dependency-injection">DI support for azure functions</a>. This provides a way to avoid initalizing the AspNet Core App with every incoming request.

Prerequisites

1. .Net Core SDK >= 3.1.100
2. Azure Function Core Tools v3

npm install -g azure-functions-core-tools@3

Instructions

1. Install the project template for dotnet and create a new project.

dotnet new --install NL.Serverless.AspNetCore.Template
dotnet new serverless-aspnetcore -n Your.New.ProjectName

2. Happy coding your AspNet Core WebApp.
3. Run the Azure Function hosting the web app

func host start -build

Application Insights / Logs

In order to see the logs of the Asp.Net Core app inside the log stream of Application Insights from the functions app you need to add the following lines:

1. Add the package reference of Microsoft.ApplicationInsights.AspNetCore to the .csproj of your web app

   <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.14.0" />

2. Register the Applications Inisghts services in the Statup.cs of your web app

   services.AddApplicationInsightsTelemetry();
   

Please note that Application Insights has it´s own logging levels configured in the appsettings.json. You can find the documentation here.

Here is an example:

  ...
  "Logging": {
    "LogLevel": {
      "Default": "Information"
    },
    "ApplicationInsights": {
      "LogLevel": {
        "Default": "Information"
      }
    }
  },
  ...

If you want to use another instance of Application Insights for the web app you need to add the Instrumation Key in the appsettings.json:

   ...
      "ApplicationInsights": {
        "InstrumentationKey": "putinstrumentationkeyhere"
      },
   ...

Samples

Host the ASP.NET Boilerplate sample in an Azure Function

Credits

The basic idea for this is from this repo: https://github.com/NicklausBrain/serverless-core-api

Thanks <a href="https://github.com/NicklausBrain">NicklausBrain</a>.