How to change content of a label

[ceuser1]

At the app startup I configure the logger, so I can log exceptions as soon as possible. One of the labels is User, which is unknown at this time.

For example:

	SelfLog.Enable(p => Debug.WriteLine(p));
	Log.Logger = new LoggerConfiguration()
		.MinimumLevel.Verbose()
		.Enrich.With(new DayEnricher())
		.WriteTo.GrafanaLoki(
			Settings.Default.LogLokiEndpoint,
			new List<LokiLabel>
			{
				new() { Key = "Country", Value = "MyCountry" },
				new() { Key = "Company", Value = "MyCompany" },
				new() { Key = "Project", Value = "MyProject" },
				new() { Key = "Application", Value = "MyApplication" },
				new() { Key = "User", Value = "unknown at this time" },
				new() { Key = "Terminal", Value = Environment.MachineName },
				new() { Key = "Ip", Value = LoggingHelper.GetLocalIpAddress() },
				new() { Key = "Version", Value = LoggingHelper.GetApplicationVersion() },
				new() { Key = "Culture", Value = "en-US" },
				new() { Key = "ApplicationLocation", Value = LoggingHelper.GetApplicationLocation() }
			},
			new List<string> { "Day", "Tag" },
			credentials: new LokiCredentials { Login = Settings.Default.LogLokiUsername, Password = Settings.Default.LogLokiPassword },
			restrictedToMinimumLevel: Settings.Default.LogLokiSinkMinLevel
		)
		.WriteTo.Logger(p => p
			.WriteTo.File(
				Settings.Default.LogFileSinkFolder,
				Settings.Default.LogFileSinkMinLevel,
				"{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} [{Level:u3}]|{Message:lj}{NewLine}{Exception}",
				rollingInterval: RollingInterval.Day
			)
		)
		.CreateLogger();

Then the user logs in, so I know his User. Is it possible to overwrite the User label, or do I have to configure the full logger again?

[mishamyte]

Hi!

I would not recommend to overuse the static labels (properties), cause it will lead to the high cardinality problem.

If you use logger as it was designed, for the structured logging, you will have all your labels in place.

Also, probably, you should read that page from the documentation. It has an examples how to work with such kind of data, using Grafana's JSON parser as a part of the pipeline step

[ceuser1]

Thanks @mishamyte! I removed most of the labels and started using structured logging with the combination of JSON parser, and it works perfect :)

And for my original question - instead of a label for User I use a property: LogContext.PushProperty("User", user.Name);