CODEWITHSUNDEEP
azure-functions
Vinyl Warmth
Vinyl Warmth

Reputation: 2506

Why am I unable to see Application Insights events in my Azure Functions app?

I have a v4 .NET 6 functions app and I want to record custom Application Insights events.

I've added the Microsoft.Azure.WebJobs.Logging.ApplicationInsights 3.0.30 NuGet package.

In Startup I've tried registering telemetry with

var telemetryConfiguration = new TelemetryConfiguration(VALID_INSTRUMENTATION_KEY_HERE);
builder.Services.AddSingleton(_ => new TelemetryClient(telemetryConfiguration));

and

builder.Services.AddApplicationInsightsTelemetry(VALID_INSTRUMENTATION_KEY_HERE);

In my function I've wired up the TelemetryClient using constructor injection however when I check the instance in a break point there is no Instrumentation Key set?

I've also tried calling TrackEvent by newing up a TelemetryClient in my code but I'm not seeing the event in the Application Insights Logs view

new TelemetryClient(new TelemetryConfiguration(VALID_INSTRUMENTATION_KEY_HERE)).TrackEvent(new EventTelemetry("AddSearchesToQueue"));

Does anyone know what I'm doing wrong here?

Upvotes: 0

Views: 1732

Answers (2)

Naman Sinha
Naman Sinha

Reputation: 92

Well, in the first go, this may feel out of context but this is what happened with me. My code was absolutely correct but the issue was that my Application Insights was connected to an Azure Log Analytics Workspace which had so many other App Insights connected to it so there was huge amount of data getting ingested into it. And, there was a Daily cap of 5 GB put on the Log Analytics Workspace.

So, even if your code is correct but there is any restriction on the Log Analytics Workspace, you will not receive any error and your code will work seamlessly but no traces, information, error, events etc. will be visible in your Application Insights.

It is advisable to check if there are any such setting enabled at the App Insights or Log Analytics Workspace. Another thing that can be check is Network Isolation which sometimes blocks telemetry from public sources if Virtual network access configuration section has a Yes for both the options.

Upvotes: 0

Delliganesh Sevanesan
Delliganesh Sevanesan

Reputation: 4778

I have added the < PackageReference Include="Microsoft.Azure.WebJobs.Logging.ApplicationInsights" Version="3.0.30" /> package reference in our .NET 6 Azure function project

And you need to initialize the Custom Telemetry in your function

The workaround below

Funciton1.cs

[FunctionName("Function1")]

public static async Task<IActionResult> Run( [HttpTrigger(AuthorizationLevel.Anonymous, "get", "post",Route = null)] HttpRequest req, ILogger log, ExecutionContext context)
{
    var config = new ConfigurationBuilder()
        .SetBasePath(context.FunctionAppDirectory)
        .AddJsonFile("local.settings.json", optional: true, reloadOnChange: true)
        .AddEnvironmentVariables()
        .Build();
    
    var connectionString = "ConnectionString";
    var tc = new Microsoft.ApplicationInsights.TelemetryClient(new TelemetryConfiguration()
        { ConnectionString = config[$"{connectionString}"]  }
        );
    
    tc.TrackEvent("Calling azure function", new Dictionary<string, string> { { "FunctionType", "Function action" } }, null);
    tc.TrackEvent("Processing task item", new Dictionary<string, string> { { "Item", "Your item" } }, null);
    tc.TrackEvent("Completed azure function");
    
    log.LogInformation("C# HTTP trigger function processed a request.");
    
    string name = req.Query["name"];
    string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
    dynamic data = JsonConvert.DeserializeObject(requestBody);
    name = name ?? data?.name;
    string responseMessage = string.IsNullOrEmpty(name) ? "This HTTP triggered function executed successfully. Pass a name in the query string or in the request body for a personalized response.": $"Hello, {name}. This HTTP triggered function executed successfully.";
    
    tc.TrackEvent("Responsemessage:" + responseMessage);
    tc.Flush();
    
    return new OkObjectResult(responseMessage);
    
}

Local.settings.json

{
    "IsEncrypted": false,
    "Values": { 
        "AzureWebJobsStorage": "UseDevelopmentStorage=true",
        "FUNCTIONS_WORKER_RUNTIME": "dotnet",
        "APPINSIGHTS_INSTRUMENTATIONKEY": "<App insights instrumentation key>",
        "ConnectionString": "<Your Connection stirng for app insghts>"
    }
}

enter image description here

I could see the custom logs in Application insights

enter image description here

Refer Tracing and logging with Application Insights

Upvotes: 1

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