Configure Serilog from database

[Pete Burgess]

I'd like to be able to configure Serilog by getting values from a configuration database. I see that the configuration can be read from KeyValyePairs, but does this include which sinks are written to?

[nblum...@nblumhardt.com]

Hi Pete - yes, absolutely. So long as the DLL housing the Sink is loaded (or in the same folder as your application binaries) a key like "write-to:SinkName" will do it.

You can infer the syntax from this documentation: https://github.com/serilog/serilog/wiki/AppSettings#adding-a-sink (just omit the "serilog:").

The configuration system is extensible, so there are more direct ways to implement this, but reusing the key/value pair support will provide a bit of a head start.

Cheers!

[Pete Burgess]

Thanks Nicholas, I must be doing something wrong.

This works:

                ...

                loggerConfiguration.WriteTo.ColoredConsole();

                Serilog.Log.Logger = loggerConfiguration.CreateLogger();

                Serilog.Log.Logger.Information("it lives!");

this doesn't:

                ...

                loggerConfiguration.ReadFrom.KeyValuePairs(new[] { new KeyValuePair<string,string>("write-to:ColoredConsole", "") });

                Serilog.Log.Logger = loggerConfiguration.CreateLogger();

                Serilog.Log.Logger.Information("it dies!");

nor does splitting it into key-value:

                ...

                loggerConfiguration.ReadFrom.KeyValuePairs(new[] { new KeyValuePair<string,string>("write-to", "ColoredConsole") });

                Serilog.Log.Logger = loggerConfiguration.CreateLogger();

                Serilog.Log.Logger.Information("it dies!");

?

Further, will I also need the "using" key for extra sinks (e.g. Seq)?

Thanks

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[nblum...@nblumhardt.com]

Aaah - just realised it's probably this:

https://github.com/serilog/serilog-generator/blob/master/src/serilog-generator/Configuration/CommandLineSettings.cs#L17

KeyValuePairs() is implemented in the core (portable) Serilog.dll and doesn't know about the sinks like ColoredConsole defined in Serilog.FullNetFx.dll - you'll need to add a line like the linked one to get this working.

(It's likely we'll eliminate this wart sometime in the transition to the VS2015 project/packaging tools.)

Cheers!

Nick

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[Pete Burgess]

Thanks Nick, that's worked perfectly :D

LoggerConfiguration loggerConfiguration = new LoggerConfiguration(); loggerConfiguration.ReadFrom.KeyValuePairs(new[] { new KeyValuePair<string,string>("using:_CommandLineSettingsSerilogFullNetFx", "Serilog.FullNetFx"), new KeyValuePair<string,string>("write-to:ColoredConsole", "") }); Serilog.Log.Logger = loggerConfiguration.CreateLogger(); Serilog.Log.Logger.Information("it LIVES!");

PeteB

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[Pete Burgess]

Nick

Is there a list of setting key names for SeriLog and the Sinks?

I know you've said we can just "convert" the XML parameter by removing "serilog:" from the key name but not all of the sinks list all of the parameter names (e.g. RollingFile); do I have to look at the parameter names of the C# WriteTo extension methods (do these parameter names map exactly)?

PeteB

[nblum...@nblumhardt.com]

Hi Pete - no, though there are a few examples on the wiki, there's no comprehensive list out there right now. Going off of the C# method parameter names is the best option.

I'd love to improve the situation a bit, but our initial idea of adding this alongside the C# configuration sample for each sink turned out to create a lot of clutter and noise. Open to suggestions and ideas here.

Cheers!

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