Serilog seq configuration is not reloaded when Seq serverUri is updated in appsettings.json file

[bigswede74]

Description

I have a windows application that is logging using the Serilog.Sinks.Seq. All the configuration is coming from the appsettings.json file however when I update the serverUri while the application is running the configuration is not dynamically reloaded until the application is restarted. Does the seq sink support dynamic configuration updates for the serverUri?

Reproduction

• Create a console application
• Add Serilog, Serilog.Settings.Configuration, Microsoft.Extensions.Configuration.Json packages
• Add the appsettings.json file with reloadOnChange = true
• Build serilog from the configuration
• Change the seqUri while the application is running

Program.cs

private ILogger _logger;
private IConfiguration _configuration; 

public static void Main(string[] args)
{
    var builder = new ConfigurationBuilder()
        .SetBasePath(Directory.GetCurrentDirectory())
        .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);

    _configuration = builder.Build();

    _logger = new LoggerConfiguration()
        .ReadFrom.Configuration(_configuration)
        .CreateLogger();

    Log.Logger = _logger;
}

appsettings.json

{
    "Serilog": {
        "Using": [ "Serilog.Sinks.Console", "Serilog.Sinks.File", "Serilog.Sinks.Seq" ],
        "MinimumLevel": "Information",
        "WriteTo": [
            {
                "Name": "Console"
            },
            {
                "Name": "File",
                "Args": {
                    "path": "C:\\logs\\myApp-.log",
                    "fileSizeLimitBytes": 200000000,
                    "rollOnFileSizeLimit": true,
                    "rollingInterval": "Day",
                    "retainedFileCountLimit": 14
                }
            },
            {
                "Name": "Seq",
                "Args": {
                    "serverUrl": "http://localhost:5341"
                }
            }
        ],
        "Enrich": [ "FromLogContext", "FromGlobalLogContext" ],
        "Destructure": [
            {
                "Name": "ToMaximumDepth",
                "Args": {
                    "maximumDestructuringDepth": 20
                }
            }
        ],
        "Properties": {
            "ApplicationName": "MyApp"
        }
    }
}

Expected behavior Logs should be forwarded to the new seq address

Relevant package, tooling and runtime versions Packages

• Microsoft.Extensions.Hosting 7.0.0
• Microsoft.Extensions.Hosting.WindowsServices 7.0.0
• Serilog 2.12.0
• Serilog.Settings.Configuration 3.4.0
• Serilog.SInks.Console 4.1.0
• Serilog.Sinks.Seq 5.2.2

Platform

• Windows 10

[nblumhardt]

Hi! AFAIK, Serilog.Settings.Configuration only supports reloading a small number of settings at runtime (minimum level being the one I know of). I don't think there's any support for reloading sink arguments like these. HTH!

[bigswede74]

Thanks for the quick response. Any recommendations on how I can accomplish this would be welcome. Should I just re-initialize a new logger and replace it in the DI container?

[SimonCropp]

restart the app