Why asp.net core logging everything?

Question

I have creted my first asp.net core 3.0 application. And setup.cs file with serilog file extension like following:

   public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }
        public IConfiguration Configuration { get; }

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllers();
        }
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory loggerFactory)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            loggerFactory.AddFile("logs/ts-{Date}.txt");
            ....

And appsettings.json is:

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "AllowedHosts": "*"
}

But this logs so many information while application running. But I want to save only my log calls in controller actions or anywhere else:

 public class WeatherForecastController : ControllerBase
 {
    private readonly ILogger<WeatherForecastController> _logger;

    public WeatherForecastController(ILogger<WeatherForecastController> logger)
    {
        _logger = logger;
    }

    [HttpGet]
    public IEnumerable<WeatherForecast> Get()
    {
       _logger.LogInformation("oops");
       ....
    }
 }

Community · Accepted Answer · 2020-06-20 09:12:55Z

1

The default template for .NET Core 3 projects also has a appsettings.Development.json file which overrides settings in the base appsettings.json file. It will look something like this:

{
  "Logging": {
    "LogLevel": {
      "Default": "Debug",
      "System": "Information",
      "Microsoft": "Information"
    }
  }
}

Note that the log level is set to Debug which is why your logs contain so many entries.

From the docs:

AddJsonFile is automatically called twice when you initialize a new host builder with CreateDefaultBuilder. The method is called to load configuration from:

appsettings.json – This file is read first. The environment version of the file can override the values provided by the appsettings.json file.

appsettings.{Environment}.json – The environment version of the file is loaded based on the IHostingEnvironment.EnvironmentName.

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Oct 30, 2019 at 21:25

DavidG

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Comments

krishna422 · Accepted Answer · 2021-09-17 10:48:36Z

0

as @DavidG already answered, the logging levels specify the logs that are logged.

check the out this below links for more information on logging: https://learn.microsoft.com/en-us/aspnet/core/fundamentals/logging/?view=aspnetcore-5.0#configure-logging-1

https://learn.microsoft.com/en-us/aspnet/core/fundamentals/logging/?view=aspnetcore-5.0#log-level-1

below is a sample that logs only the _logger.LogInformation("oops");

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "None",
      "System": "None"
    }
  }
}

answered Sep 17, 2021 at 10:48

krishna422

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