Initialization loggerFactory limitations

Is your feature request related to a problem? Please describe.

Currently some IHostBuilder extensions methods (e.g. AddKubernetesConfiguration(), AddConfigServer()) accepts an optional ILoggerFactory.

Because this code is evaluated before the DynamicSerilogProvider is created, the loggerFactory can only be configured using a static serilog configuration, i.e. its log level cannot be changed at runtime and cannot be configured from appsettings.

//create loggerFactory from a static configuration (not ideal)
ILoggerFactory initLogFactory = new LoggerFactory().AddSerilog(new LoggerConfiguration().MinimumLevel.Error().WriteTo.Console().CreateLogger());

return Host.CreateDefaultBuilder(args)
    .AddDynamicSerilog()
    .AddKubernetesConfiguration(null, initLogFactory) //initLogFactory is not configured with DynamicSerilog
    .AddConfigServer(initLogFactory) //initLogFactory is not configured with DynamicSerilog
    .AddDiscoveryClient()
    .AddAllActuators()
    .ConfigureWebHostDefaults(webBuilder => webBuilder.UseStartup<Startup>());

Describe the solution you’d like

I would like to be able to pass loggerFactory in a lazy manner, so that I can build it when the DynamicSerilog is available. If that is not possible maybe those extension method may avoid to receive a loggerFactory as parameter, andthey could take it using DI instead (is it possible?).

Describe alternatives you’ve considered

Use a static Serilog LoggerConfiguration.

[hananiel]

@DaviGia To clarify, the requirement has to do with the ILoggerFactory respecting the available configuration and not with the dynamically changing the log level via actuators. If you have a sample with the other config sources you mention that will be great.

[hananiel]

@DaviGia I am wondering what the use case for this is. The logFactory is only used in the build phase. So your app is not ready and available for you to change configuration dynamically. Can you please clarify? Is it that it cannot be configured from app settings?