Azure Function App doesn't forward logs to AppInsight

Question

I'm encountering an issue where Azure Function App isn't forwarding logs to AppInsight. I've checked the file system logs on the function app, and they're working fine and complete. Also, I'm sure that my APPINSIGHTS_INSTRUMENTATIONKEY is configured correctly. Moreover, this only happens in the dev environment; in higher environments, it works fine. I'm using Terraform to create resources. Do you know what possibilities could lead to this issue? (network, role, configuration, etc.) Thanks a lot.

screenshot filesystem log

My host.json

{
  "version": "2.0",
  "logging": {
    "fileLoggingMode": "always",
    "logLevel": {
      "default": "Information",
      "Host": "Error",
      "Function": "Information",
      "Host.Aggregator": "Information"
    }
  }
}

Startup.cs

public override void Configure(IFunctionsHostBuilder builder)
{
    builder.Services
        .AddLogging(lb =>
        {
            lb.AddApplicationInsightsWebJobs(options =>
            {
                options.InstrumentationKey = Environment.GetEnvironmentVariable("APPINSIGHTS_INSTRUMENTATIONKEY");
            });
        })
    // Already try AddLogging()

}

my csproj

 <Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
    <AzureFunctionsVersion>v4</AzureFunctionsVersion>
  </PropertyGroup>  
  <ItemGroup>
    <PackageReference Include="Microsoft.Azure.Functions.Extensions" Version="1.1.0" />
    <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.EventGrid" Version="2.1.0" />
    <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.Kafka" Version="3.8.0" />
    <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.ServiceBus" Version="4.2.1" />
    <PackageReference Include="Microsoft.Extensions.Http" Version="2.1.0" />
    <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="4.1.3" />
  </ItemGroup>
  <ItemGroup>
    <ProjectReference Include="..\EventBroker.Application\EventBroker.Application.csproj" />
    <ProjectReference Include="..\EventBroker.Infrastructure\EventBroker.Infrastructure.csproj" />
  </ItemGroup>
  <ItemGroup>
    <None Update="host.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
  </ItemGroup>
</Project>

Please share your .csproj file. Also please share your function code. — Harshitha Veeramalla
– Harshitha Veeramalla, Commented May 13, 2024 at 10:03
You are having issue in getting logs when the app is running locally? — Harshitha Veeramalla
– Harshitha Veeramalla, Commented May 13, 2024 at 10:03
You are setting Instrumentation key from Environment variable.Does your local app has environment variable set? — Harshitha Veeramalla
– Harshitha Veeramalla, Commented May 13, 2024 at 11:15
What Azure Function kind are you using (In-process or Isolated)? What .NET version? — Vlad DX
– Vlad DX, Commented May 13, 2024 at 21:42
Hi @Harshitha, I have already shared .csproj file. I just implement log.LogInformation in function code. I have issue the log that is not forwarded to appinsight. But I already check the filesystem log in function. It work properly — tatea99
– tatea99, Commented May 15, 2024 at 1:31

Vlad DX · Accepted Answer · 2024-05-13 21:47:01Z

0

You don't need to configure DI for Application Inisghts.

Application Insights is added by Azure Functions automatically.

https://learn.microsoft.com/en-us/azure/azure-functions/functions-dotnet-dependency-injection#logging-services

You just need to configure Application Insights by using either of:

APPLICATIONINSIGHTS_CONNECTION_STRING

https://learn.microsoft.com/en-us/azure/azure-functions/functions-app-settings#applicationinsights_connection_string
APPINSIGHTS_INSTRUMENTATIONKEY

https://learn.microsoft.com/en-us/azure/azure-functions/functions-app-settings#appinsights_instrumentationkey

answered May 13, 2024 at 21:47

Vlad DX

4,81821 silver badges31 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

tatea99 Over a year ago

Already tried this. But the log is still not forwarded to App Insight

Harshitha Veeramalla · Accepted Answer · 2024-05-16 16:14:02Z

0

In addition to Vlad DX's answer check the below steps.

Configure the Application Insights from Connected Services.

enter image description here

Instrumentation key is stored in Secrets.json file locally.

enter image description here

As mentioned by Vlad DX, you don`t need to add Dependency Injection for Application Insights.

I did not add any Startup file, I have tried to run the default Function App and log messages locally.
Default host.json worked for me.

My host.json file:

{
    "version": "2.0",
    "logging": {
        "applicationInsights": {
            "samplingSettings": {
                "isEnabled": true,
                "excludedTypes": "Request"
            }
        }
    }
}

My .csproj file:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
    <AzureFunctionsVersion>v4</AzureFunctionsVersion>
    <ApplicationInsightsResourceId>/subscriptions/****/resourceGroups/****/providers/microsoft.insights/components/FunctionApp1</ApplicationInsightsResourceId>
    <UserSecretsId>****</UserSecretsId>
  </PropertyGroup>
  <ItemGroup>
  
    <PackageReference Include="Microsoft.ApplicationInsights.WorkerService" Version="2.21.0" />  
  
    <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" Version="6.0.1" />
    <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="4.1.1" />
  </ItemGroup>
  <ItemGroup>
    <None Update="host.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="local.settings.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
      <CopyToPublishDirectory>Never</CopyToPublishDirectory>
    </None>
  </ItemGroup>
</Project>

You can see the traces requested from localhost.

enter image description here

Deployed Function Output:

enter image description here

answered May 16, 2024 at 16:14

Harshitha Veeramalla

9,4382 gold badges15 silver badges22 bronze badges

3 Comments

Harshitha Veeramalla Over a year ago

@tatea99 - Are you able to log traces ?

CodeMonkey Over a year ago

Can you check out this question as well? stackoverflow.com/questions/79016060/…

Harshitha Veeramalla Over a year ago

Sure..will check and let you know

Collectives™ on Stack Overflow

Azure Function App doesn't forward logs to AppInsight

2 Answers 2

1 Comment

3 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

3 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related