kubernetes pod控制台内的.net Core 2.0日志记录

Question

我在.net core 2.0中编写了一些Web API，并使用kubernetes集群内部的docker容器进行了部署。我正在使用以下日志记录配置，但无法在kubernetes pod控制台中看到任何日志。我在这里错过了什么吗？

appsettings.json和appsettings.Development.json中的日志记录部分

{
  "Logging": {
    "IncludeScopes": true,
    "LogLevel": {
      "Default": "Debug",
      "System": "Information",
      "Microsoft": "Information"
    },
    "Console": {
      "LogLevel": {
        "Default": "Information",
        "System": "Information",
        "Microsoft": "Information"
      }
    }
  }
}

内部Program.cs：

public static IWebHost BuildWebHost(string[] args)
{
    return new WebHostBuilder()
        .UseKestrel()
        .ConfigureAppConfiguration((hostingContext, config) =>
        {
            var env = hostingContext.HostingEnvironment;

            config.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
                .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true, reloadOnChange: true);

            if (env.IsDevelopment())
            {
                var appAssembly = Assembly.Load(new AssemblyName(env.ApplicationName));
                if (appAssembly != null)
                {
                    config.AddUserSecrets(appAssembly, optional: true);
                }
            }

            config.AddEnvironmentVariables();

            if (args != null)
            {
                config.AddCommandLine(args);
            }
        })
        .ConfigureLogging((hostingContext, logging) =>
        {
            logging.AddConfiguration(hostingContext.Configuration.GetSection("Logging"));
            logging.AddConsole();
            logging.AddDebug();
        })
        .UseDefaultServiceProvider((context, options) =>
        {
            options.ValidateScopes = context.HostingEnvironment.IsDevelopment();
        })
        .UseStartup<Startup>()
        .Build();
}

登录其他类的示例：

_logger.LogInformation("This log should go in kubernetes pod console");

Answer 1

您是否尝试过使用 DI 为强大的日志记录而构建的通用第三方包？这可能适合您的需求！下面的代码显示了如何注入 Serilog Program.cs，并可用于通过您选择的多个通道输出其日志（我个人在 macOS 上本地使用 minikube 以及 GCP 上的暂存环境）。

\n

WebHost.CreateDefaultBuilder(args)\n                .UseSerilog((context, configuration) =>\n                {\n                    configuration\n                        .MinimumLevel.Debug()\n                        .MinimumLevel.Override("Microsoft", LogEventLevel.Warning)\n                        .MinimumLevel.Override("System", LogEventLevel.Warning)\n                        .MinimumLevel.Override("Microsoft.AspNetCore.Authentication", LogEventLevel.Information)\n                        .Enrich.FromLogContext()\n                        .WriteTo.Console(\n                            outputTemplate:\n                            "[{Timestamp:yyyy-MM-dd HH:mm:ss} {Level}] {SourceContext}{NewLine}{Message:lj}{NewLine}{Exception}{NewLine}",\n                            theme: AnsiConsoleTheme.Literate);\n                })\n

\n

上面的期望输出类似于 Kubernetes 中的输出：

\n

 xxxxx@iMac \xee\x82\xb0 ~/Projects/xxxxx \xee\x82\xb0 \xee\x82\xa0 xxxxbranch/xxx-xxx \xee\x82\xb0 kubectl logs xxxx-xxxx-6b9dd8dc67-vc9ch\n[2020-08-04 12:11:37 Warning] Microsoft.AspNetCore.DataProtection.Repositories.FileSystemXmlRepository\nStoring keys in a directory '/xxxxxxxxx/.aspnet/DataProtection-Keys' that may not be persisted outside of the container. Protected data will be unavailable when container is destroyed.\n\n[2020-08-04 12:11:37 Warning] Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager\nNo XML encryptor configured. Key {xxxxxx} may be persisted to storage in unencrypted form.\n\n[2020-08-04 12:11:37 Warning] Microsoft.AspNetCore.Server.Kestrel\nOverriding address(es) 'https://+:8081'. Binding to endpoints defined in UseKestrel() instead.\n\nHosting environment: Production\nContent root path: /app\nNow listening on: https://0.0.0.0:8081\nApplication started. Press Ctrl+C to shut down.\n

\n

这些输出也存储在 Google Cloud 的日志记录仪表板中。

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