PublishSingleFile=true don't generate log files

[atliuhui]

net7.0

dotnet new web

dotnet add package Serilog.AspNetCore --version 6.1.0

appsettings.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "AllowedHosts": "*",
  "Serilog": {
    "MinimumLevel": {
      "Default": "Information",
      "Override": {
        "Microsoft": "Warning",
        "Microsoft.Hosting.Lifetime": "Information"
      }
    },
    "WriteTo": [
      {
        "Name": "File",
        "Args": {
          "path": "logs/.log",
          "rollingInterval": "Day",
          "rollOnFileSizeLimit": true,
          "fileSizeLimitBytes": 10485760
        }
      }
    ]
  }
}

Program.cs

using Serilog;

var builder = WebApplication.CreateBuilder(args);

builder.Host.UseSerilog((context, services, configuration) => configuration
    .ReadFrom.Configuration(context.Configuration)
    .Enrich.FromLogContext()
    .WriteTo.Console());

var app = builder.Build();

app.MapGet("/", () => "Hello World!");

app.Run();

FolderProfile.pubxml

<?xml version="1.0" encoding="utf-8"?>
<Project>
  <PropertyGroup>
    <DeleteExistingFiles>true</DeleteExistingFiles>
    <ExcludeApp_Data>false</ExcludeApp_Data>
    <LaunchSiteAfterPublish>true</LaunchSiteAfterPublish>
    <LastUsedBuildConfiguration>Release</LastUsedBuildConfiguration>
    <LastUsedPlatform>Any CPU</LastUsedPlatform>
    <PublishProvider>FileSystem</PublishProvider>
    <PublishUrl>bin\Release\net7.0\publish\</PublishUrl>
    <WebPublishMethod>FileSystem</WebPublishMethod>
    <_TargetId>Folder</_TargetId>
    <SiteUrlToLaunchAfterPublish />
    <TargetFramework>net7.0</TargetFramework>
    <RuntimeIdentifier>win-x64</RuntimeIdentifier>
    <PublishSingleFile>true</PublishSingleFile>
    <ProjectGuid>38063059-68b5-41ee-b324-71080dbe2454</ProjectGuid>
    <SelfContained>false</SelfContained>
  </PropertyGroup>
</Project>

run test.exe don't generate log files. but when PublishSingleFile=false, generate log files is OK.

[SimonCropp]

to save us some time, can u push up the full solution to a github repository

[atliuhui]

please pull this repo: https://github.com/atliuhui/debug-serilog

[billhong-just]

Me too 👀

[daren-porter]

This seems very similar to an issue that I ran into with LogContext not working correctly when PublishSingleFile=true: https://github.com/serilog/serilog/issues/1558

TL;DR - Automatic discovery of configuration assemblies is not supported in bundled mode. You may need to explicitly list the Serilog assembly names being referenced in the "Using" array of the Serilog settings section. Something like this:

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "AllowedHosts": "*",
  "Serilog": {
    "Using": [      <------ This section!
        "Serilog",
        "Serilog.Sinks.File",
        "Serilog.Settings.Configuration",
        ... etc
    ],
    "MinimumLevel": {
      "Default": "Information",
      "Override": {
        "Microsoft": "Warning",
        "Microsoft.Hosting.Lifetime": "Information"
      }
    },
    "WriteTo": [
      {
        "Name": "File",
        "Args": {
          "path": "logs/.log",
          "rollingInterval": "Day",
          "rollOnFileSizeLimit": true,
          "fileSizeLimitBytes": 10485760
        }
      }
    ]
  }
}