Serilog:记录到不同的文件

本文关键字：文件 记录 Serilog | 更新日期: 2023-09-27 17:57:55

无论LogLevel如何，我都会将所有类型的事件记录到单个Json文件中。现在我需要将一些自定义性能计数器记录到一个单独的Json文件中。如何在Serilog中做到这一点。我是否应该创建不同的Logger实例，并在记录性能计数器时使用该实例？想要将其与LibLog 一起使用

Serilog:记录到不同的文件

您可以首先确保性能计数器事件标记有特定的属性值（LibLog中的OpenMappedContext()）或来自特定类型/命名空间。

var log = LogProvider.For<MyApp.Performance.SomeCounter>()
log.Info(...);

配置Serilog时，应用了筛选器的子记录器可以将所需的事件仅发送到第二个文件。

Log.Logger = new LoggerConfiguration()
    .WriteTo.Logger(lc => lc
        .Filter.ByExcluding(Matching.FromSource("MyApp.Performance"))
        .WriteTo.File("first.json", new JsonFormatter()))
    .WriteTo.Logger(lc => lc
        .Filter.ByIncludingOnly(Matching.FromSource("MyApp.Performance"))
        .WriteTo.File("second.json", new JsonFormatter()))
    .CreateLogger();

我们也可以在配置文件中设置它。以下是appsettings.json中的一个示例，用于根据级别拆分日志滚动文件

{
 
  "Serilog": {
    "MinimumLevel": {
      "Default": "Debug",
      "Override": {
        "Default": "Information",
        "Microsoft": "Warning",
        "Microsoft.Hosting.Lifetime": "Information"
      }
    },
    "WriteTo": [
      {
        "Name": "Logger",
        "Args": {
          "configureLogger": {
            "Filter": [
              {
                "Name": "ByIncludingOnly",
                "Args": {
                  "expression": "(@Level = 'Error' or @Level = 'Fatal' or @Level = 'Warning')"
                }
              }
            ],
            "WriteTo": [
              {
                "Name": "File",
                "Args": {
                  "path": "Logs/ex_.log",
                  "outputTemplate": "{Timestamp:o} [{Level:u3}] ({SourceContext}) {Message}{NewLine}{Exception}",
                  "rollingInterval": "Day",
                  "retainedFileCountLimit": 7
                }
              }
            ]
          }
        }
      },
      {
        "Name": "Logger",
        "Args": {
          "configureLogger": {
            "Filter": [
              {
                "Name": "ByIncludingOnly",
                "Args": {
                  "expression": "(@Level = 'Information' or @Level = 'Debug')"
                }
              }
            ],
            "WriteTo": [
              {
                "Name": "File",
                "Args": {
                  "path": "Logs/cp_.log",
                  "outputTemplate": "{Timestamp:o} [{Level:u3}] ({SourceContext}) {Message}{NewLine}{Exception}",
                  "rollingInterval": "Day",
                  "retainedFileCountLimit": 7
                }
              }
            ]
          }
        }
      }
    ],
    "Enrich": [
      "FromLogContext",
      "WithMachineName"
    ],
    "Properties": {
      "Application": "MultipleLogFilesSample"
    }
  }
}

然后，您只需要修改Program.cs文件中的CreateHostBuilder方法即可从配置文件中读取

public static IHostBuilder CreateHostBuilder(string[] args) =>
        Host.CreateDefaultBuilder(args)
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder.UseStartup<Startup>();
            })
            .UseSerilog((hostingContext, loggerConfig) =>
                loggerConfig.ReadFrom.Configuration(hostingContext.Configuration)
            );

有关更多详细信息，请参阅此处的文章

如果您想拥有一个独立的日志记录管道，只需创建另一个实例即可。这是从https://github.com/serilog/serilog/wiki/Lifecycle-of-Loggers:

using (var performanceCounters = new LoggerConfiguration()
        .WriteTo.File(@"myapp'log.txt")
        .CreateLogger())
{
    performanceCounters.Information("Performance is really good today ;-)");
    // Your app runs, then disposal of `performanceCounters` flushes any buffers
}

我使用以下代码将不同级别的日志记录到不同的文件中。

var conn = configuration.GetSection("ConnectionStrings:SqlConn").Value;
var serilogLogger = new LoggerConfiguration()
            .MinimumLevel.Information()
            .WriteTo.Console()
            .WriteTo.MSSqlServer(conn, new MSSqlServerSinkOptions { TableName = "ErrorLogs", AutoCreateSqlTable = true }, restrictedToMinimumLevel: Serilog.Events.LogEventLevel.Warning)
            .WriteTo.MSSqlServer(conn, new MSSqlServerSinkOptions { TableName = "InfoLogs", AutoCreateSqlTable = true }, restrictedToMinimumLevel: Serilog.Events.LogEventLevel.Information)
            .CreateLogger();
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