serilog/serilog-extensions-hosting

Serilog not working on Host initialization

klyse opened this issue · 5 comments

klyse commented

I'm using the following nuget packages:

<PackageReference Include="Serilog.Extensions.Hosting" Version="2.0.0" />
<PackageReference Include="Serilog.Sinks.Console" Version="3.1.1" />
<PackageReference Include="Serilog.Sinks.File" Version="4.0.0" />
<PackageReference Include="Serilog.Settings.Configuration" Version="3.1.0" />

Following the documentation example the logger works:

public class Program
{
	public static void Main(string[] args)
	{
		Log.Logger = new LoggerConfiguration()
					 .MinimumLevel.Debug()
					 .MinimumLevel.Override("Microsoft", LogEventLevel.Information)
					 .Enrich.FromLogContext()
					 .WriteTo.Console()
					 .CreateLogger();
	}

	public static IHostBuilder CreateHostBuilder(string[] args)
	{
		return new HostBuilder()
			.UseSerilog();
	}
}

However if I use my preferred way (also documented):

.UseSerilog((hostingContext, loggerConfiguration) => loggerConfiguration																 
    .ReadFrom.Configuration(hostingContext.Configuration)
    .Enrich.FromLogContext()
    .WriteTo.Console());

Same situation if i use the appsettings.json:

.UseSerilog((hostingContext, loggerConfiguration) =>
		   {
			   loggerConfiguration.ReadFrom.Configuration(hostingContext.Configuration)
								  .Enrich.FromLogContext();
		   });

Expected behavior: log messages appear on the console.
Actual behavior: no log on console.

andrewlock commented

Could you share your configuration (appsettings.json) please - bear in mind that the format required by Serilog's ReadFrom.Configuration() method is different to the default ASP.NET Core logging configuration.

  • 👍1
klyse commented

okay, after further trouble shooting I found the error somewhere in the config.
The issue that led me on the wrong path is the following:

.UseSerilog((hostingContext, loggerConfiguration) => loggerConfiguration																 
    .ReadFrom.Configuration(hostingContext.Configuration)
    .Enrich.FromLogContext()
    .WriteTo.Console());

The logger does not work if the hostingContext.Configuration is either empty or not valid. Even if the .WriteTo.Console() method gets called. Correct?

Same for this example:

.UseSerilog((hostingContext, loggerConfiguration) =>
	{
		loggerConfiguration.WriteTo.Console();
	});

This way I figured that it's a logger problem and not configuration related.

nblumhardt commented

I am not sure what's going on, here - some more info might be needed, if you think there's a problem in the Serilog code causing this. Cheers!

klyse commented

Hi @nblumhardt,
never mind :). I was only confused with the configuration.

Best regards
Klyse

  • 👍1
CarpeCodemAtGit commented

I have interesting issue using rabbitmq using generic host

running IHostedService and if i use UseSerilog(with configuration etc) rabbit doesnt catch message (most of the time, sometimes at start it does get a single message)

using following (tried using all 3 versions of hosting)

<PackageReference Include="Microsoft.Extensions.Configuration" Version="3.1.4" />
<PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="3.1.4" />
<PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="3.1.4" />
<PackageReference Include="Microsoft.Extensions.Configuration.FileExtensions" Version="3.1.4" />
<PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="3.1.4" />
<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="3.1.4" />
<PackageReference Include="Microsoft.Extensions.Hosting" Version="3.1.4" />
<PackageReference Include="Microsoft.Extensions.Http" Version="3.1.4" />
<PackageReference Include="Microsoft.Extensions.Logging" Version="3.1.4" />
<PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="3.1.4" />
<PackageReference Include="MongoDB.Driver" Version="2.10.4" />
<PackageReference Include="Serilog.Extensions.Hosting" Version="2.0.0" />
<PackageReference Include="Serilog.Settings.Configuration" Version="3.1.0" />
<PackageReference Include="Serilog.Sinks.Console" Version="3.1.1" />
<PackageReference Include="Serilog.Sinks.Graylog" Version="2.1.3" />