c# - 如何配置 Serilog 接收器以记录到 CloudWatch

Question

我希望能在使用 .NET Core 为 AWS CloudWatch 设置 Serilog 接收器方面得到一些指导。
我正在使用 appsettings.json 进行配置，但我无法将设置放入记录器中。尝试将日志信息写入 CloudWatch 时，会出现此错误:

An error occurred while starting the application.
AmazonClientException: No RegionEndpoint or ServiceURL configured

Amazon.Runtime.ClientConfig.Validate() in ClientConfig.cs, line 446

AmazonClientException: No RegionEndpoint or ServiceURL configured

Amazon.Runtime.ClientConfig.Validate() in ClientConfig.cs
Amazon.Runtime.AmazonServiceClient..ctor(AWSCredentials credentials, ClientConfig config) in AmazonServiceClient.cs
AWS.Logger.Core.AWSLoggerCore..ctor(AWSLoggerConfig config, string logType) in AWSLoggerCore.cs
AWS.Logger.SeriLog.AWSSink..ctor(AWSLoggerConfig loggerConfiguration, IFormatProvider iFormatProvider, ITextFormatter textFormatter) in AWSSink.cs
AWS.Logger.SeriLog.AWSLoggerSeriLogExtension.AWSSeriLog(LoggerSinkConfiguration loggerConfiguration, IConfiguration configuration, IFormatProvider iFormatProvider, ITextFormatter textFormatter) in AWSLoggerSeriLogExtension.cs
...
Microsoft.AspNetCore.Hosting.ConventionBasedStartup.Configure(IApplicationBuilder app)
Microsoft.Extensions.DependencyInjection.IServiceCollectionExtensions+InjectApiVersionRoutePolicy+<>c__DisplayClass2_0.<Configure>b__0(IApplicationBuilder app)
Microsoft.AspNetCore.Server.IISIntegration.IISSetupFilter+<>c__DisplayClass4_0.<Configure>b__0(IApplicationBuilder app)
Microsoft.AspNetCore.HostFilteringStartupFilter+<>c__DisplayClass0_0.<Configure>b__0(IApplicationBuilder app)
Microsoft.AspNetCore.Hosting.Internal.AutoRequestServicesStartupFilter+<>c__DisplayClass0_0.<Configure>b__0(IApplicationBuilder builder)
Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication()

我的代码如下:

在 Startup.cs 中:

public Startup(IHostingEnvironment env)
{
    Configuration = new ConfigurationBuilder()
        .SetBasePath(env.ContentRootPath)
        .AddJsonFile("appsettings.json")
        .AddEnvironmentVariables()
        .Build();
}

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
    loggerFactory.AddConsole(Configuration.GetSection("Logging"));
    Log.Logger = new LoggerConfiguration()
        .ReadFrom.Configuration(Configuration.GetSection("AWS.Logging"))
        .WriteTo.AWSSeriLog(Configuration)
        .CreateLogger();

    app.UseMvc();
}

我的 appsettings.json:

{
  "Logging": {
    "LogLevel": {
      "Default": "Warning"
    }
  },
  "AWS.Logging": {
    "Region": "eu-west-1",
    "LogGroup": "MyLogGroup",
    "LogLevel": {
      "Default": "Information",
      "System": "Information",
      "Microsoft": "Information"
    }
  },
  "AllowedHosts": "*"
}

我的开发人员机器上的 AWS 凭证是使用环境变量设置的:

AWS_ACCESS_KEY_ID=xxxxxxxxxx
AWS_DEFAULT_REGION=eu-west-1
AWS_SECRET_ACCESS_KEY=xxxxxxxxxxxxxxxxx

Answer 1

以防万一有人遇到同样的问题，这个 appsettings.json 解决了它:

{
  "Logging": {
    "LogLevel": {
      "Default": "Warning"
    }
  },
  "Serilog": {
    "Using": [ "AWS.Logger.SeriLog" ]
    "Region": "eu-west-1",
    "LogGroup": "MyLogGroup",
    "LogLevel": {
      "Default": "Information",
      "System": "Information",
      "Microsoft": "Information"
    }
  },
  "AllowedHosts": "*"
}