Problems with serilog.settings.appsettings and file rollover interval

3
votes

I am using SeriLog for logging in my IdentityServer3-based authentication service. I just replaced the serilog.sinks.literate plug in with the serilog.sinks.file plug in in order to get the rolling file capability offered by the File plug in. When I use the File plug in with the following configuration code in Startup.cs, it works as I expect. (I'm only using the RolloverInterval.Minute for testing. I'll switch to RolloverInterval.Day when I deploy the code.) 

Log.Logger = new LoggerConfiguration()
.WriteTo.File("E:\\Site\\AuthSvc\\Trace.log", rollingInterval: RollingInterval.Minute, retainedFileCountLimit: 10)
.CreateLogger();

As I said, that works as expected, creating a new file each minute.

Now I'm trying to use the serilog.settings.appsettings plug in to manage all of that configuration in appSettings instead of in code. So I changed the above code to: 

Log.Logger = new LoggerConfiguration()
.ReadFrom.AppSettings()
.CreateLogger();

And I included the following in my web.config appSettings: 

<add key="serilog:minimum-level" value="Debug"/>
<add key="serilog:using:File" value="Serilog.Sinks.File"/>
<add key="serilog:write-to:File.path" value="E:\Site\AuthSvc\Trace.log"/>
<add key="serilog:write-to:File.rollingInterval" value="RollingInterval.Minute"/>
<add key="serilog:write-to:File.retainedFileCountLimit" value="10"/>

When I run the service with the above configuration, I get the error message "Requested value 'RollingInterval.Minute' was not found." Similar error occurs with any RollingInterval value.

If I remove the last two appSettings, it works fine. Am I doing something wrong or does the appSettings plug in not support the rolling file features of the File sink plug in?

2
serilog

2 Answers

9
votes

I'm not sure if this is documented (I'll check), but when setting the value for enums via Serilog.Settings.AppSettings you only specify the enum member name, without the name of the enum.

e.g. instead of

<add key="serilog:write-to:File.rollingInterval" value="RollingInterval.Minute"/>

use

<add key="serilog:write-to:File.rollingInterval" value="Minute"/>
0
votes

This worked for me in a appsettings.json file:

"Serilog": {
    "Using": [ "Serilog.Sinks.Console", "Serilog.Sinks.File" ],
    "MinimumLevel": "Debug",
    "WriteTo": [
      { "Name": "Console" },
      {
        "Name": "File",
        "Args": {
          "path": "C:\\Temp\\log-.log",
          "rollingInterval": "Day"
        }
      }
    ],
    "Properties": {
      "Application": "MyService"
    }
  }