How to view log information in Azure Web App

Question

I have developed an ASP.NET Core 6 MVC web app. During development I use loggers at controllers or services like this:

public Result MyService()
{
    _logger.LogInfomation("MyService!");
    // Service's code.
}

However, after deploying to Azure App Service, I cannot find a place to observe these logs. I have tried setting App service logs and looking at Log stream but it doesn't have the information I need.

Answer 1

In the deployed Azure App Service, you can check the logs in Log Stream / Application Insights or even in the KUDU Debug Console.

• If you want to check the Information logs in Log Stream, configure AddAzureWebAppDiagnostics in Program.cs file.

• Install the Microsoft.Extensions.Logging.AzureAppServices latest NuGet Package.

My Program.cs file:

builder.Services.AddLogging(logs =>
{
    logs.AddConsole();    
    logs.AddAzureWebAppDiagnostics();
});

HomeController.cs file:

 public IActionResult Index()
 {
     _logger.LogInformation("MyService!");
     _logger.LogInformation("Logs from Controller");
     return View();
 }

• Along with Application Logging enable the below settings.

LogStream:

• As already mentioned in comments, enable Application Insights to get the detailed info of the requests/traces.

Refer my SO Thread to configure Application Insights from Code.