Hi everyone,

I want to write to a custom serilog sink, which logs errors into EMails.

I wrote a custom serilog sink based on Serilog sample code and tested the sink with a .NET 5.0 console app. It works nicely. I then added the sink package and exactly the same configuration into the appsettings.json file of my umbraco project. The sink is simply ignored.

• I use Umbraco 9.1.2.

• Setting a breakpoint shows, that the Extension method is never called.

• The debug log shows, that the assembly has been loaded.

• Entering a wrong assembly name into the Using line leads to an exception, which proves, that the Serilog configuration is read.

• I followed the instructions given here: https://our.umbraco.com/documentation/reference/V9-Config/Serilog/

This is my config:

    "Serilog": {
    "Using": [ "Formfakten.Serilog.EmailPickup" ],
    "MinimumLevel": {
        "Default": "Debug",
        "Override": {
            "Microsoft": "Warning",
            "Microsoft.Hosting.Lifetime": "Information",
            "System": "Warning"
        }
    },
    "WriteTo": [
        {
            "Name": "LaykitEmailPickup",
            "Args": {
                "fromEmail": "[email protected]",
                "toEmail": "[email protected]",
                "pickupDirectory": "/App_Data/MailCache",
                "subject": "Laykit-Fehler",
                "restrictedToMinimumLevel": "Error"
            }
        }
    ]
}

EDIT: In the Umbraco Sources in SerilogLogger.CreateWithDefaultConfiguration we see the following lines:

var loggerConfig = new LoggerConfiguration()
    .MinimalConfiguration(hostingEnvironment, loggingConfiguration, configuration)
    .ReadFrom.Configuration(configuration);

This ends in a Serilog function

Serilog.Settings.Configuration.dll ! Serilog.Settings.Configuration.ConfigurationReader.SelectConfigurationMethod()

I can see there, that the name of the ConfigurationMethod is not "LaykitEmailPickup", but "Async". The parameters are the right ones. Changing the name in the debugger from "Async" to the correct name "LaykitEmailPickup" makes the Sink working. Looks like a bug.

WTF? I set a breakpoint in Startup.cs, and watched at _config. This variable should represent the configuration as entered in the appsettings.json file. If I put the following expression in the Watch window

_config.GetSection("Serilog:WriteTo:0:Name")

the result is "Key"="Name" and "Value"="Async". The value should definitely be "LaykitEmailPickup" (see my appsettings.json above). Changing the value at this point results in a working condition.

_config["Serilog:WriteTo:0:Name"] = "LaykitEmailPickup";

But that's not the way ist should be... Any Ideas?

Mirko