使用 appsettings.json 时 Azure 函数无法初始化 Serilog Sink

Question

我创建了一个简单的 Azure 函数，其意图是使用 Serililog 记录到 Azure Blob 存储。

当对 Serilog 接收器使用内联配置时，它工作得非常好，接收器被创建并且 Serilog 愉快地写入 Blob 存储。

这行得通：

Log.Logger = new LoggerConfiguration()
   .WriteTo.AzureBlobStorage(
           "STORAGEACCOUNT CONNECTION STRING", // <-- inline config
           LogEventLevel.Information,
           null,
           "{yyyy}/{MM}/{dd}/MyLogFile.txt")
   .CreateLogger();

问题是我想通过appsettings.json 配置这一切，但是当我尝试这个（在模拟器和云中本地运行）时，它无法绑定接收器设置，因此它的无法登录到博客存储。

如果我进行调试，我可以看到配置值正按预期加载到 configuration 对象中，但它们没有应用于日志配置.

这不起作用：

Log.Logger = new LoggerConfiguration()
   .ReadFrom.Configuration(configuration)
   .CreateLogger();

appsettings.json 在这个 sn-p 中：

{

  "Serilog": {
    "MinimumLevel": {
      "Default": "Information",
      "Override": {
        "Microsoft": "Information"
      }
    },
    "WriteTo": [{
        "Name": "AzureBlobStorage",
        "Args": {
          "connectionString": " --- REPLACE WITH STORAGEACCOUNT BLOB CONNECTION STRING --- ",
          "formatter": "Serilog.Formatting.Compact.RenderedCompactJsonFormatter, Serilog.Formatting.Compact",
          "storageFileName": "{yyyy}/{MM}/{dd}/MyLogFile.txt",
          "retainedFileCountLimit": 31
        }
      }

    ],
    "Properties": {
      "Application": "int-test-logging",
      "Environment": "int"
    }
  }

}

我不确定我做错了什么，但我们将不胜感激。以下 github 存储库包含实现上述（两种方法）的代码，并重现了此行为。 https://github.com/oneiltomlinson/AzureFunctionsLogging

Answer 1

只需添加

    "Using": [ "Serilog.Sinks.AzureBlobStorage" ] //under Serilog Config

它会起作用的！

工作配置

{
    "Serilog": {
        "Using": [
            "Serilog.Sinks.AzureBlobStorage"
        ],
        "MinimumLevel": {
            "Default": "Information",
            "Override": {
                "Microsoft": "Information"
            }
        },
        "WriteTo": [
            {
                "Name": "AzureBlobStorage",
                "Args": {
                    "connectionString": " --- REPLACE WITH STORAGEACCOUNT BLOB CONNECTION STRING --- ",
                    "formatter": "Serilog.Formatting.Compact.RenderedCompactJsonFormatter, Serilog.Formatting.Compact",
                    "storageFileName": "{yyyy}/{MM}/{dd}/MyLogFile.txt",
                    "retainedFileCountLimit": 31
                }
            }
        ],
        "Properties": {
            "Application": "int-test-logging",
            "Environment": "int"
        }
    }
}

Answer 2

我也遇到了同样的问题，即使使用了所有必需的“使用”水槽，也没有任何改变。这是我的配置文件（关于 Serilog 部分）：

      "Serilog": {
    "Using": [
      "Serilog.Sinks.RollingFile",
      "Serilog.Sinks.AzureTableStorage"
    ],
    "MinimumLevel": "Information",
    "Override": {
      "Microsoft": "Warning",
      "Microsoft.EntityFrameworkCore": "Information"
    },
    "WriteTo": [
      {
        "Name": "Logger",
        "Args": {
          "configureLogger": {
            "MinimumLevel": "Information",
            "WriteTo": [
              {
                "Name": "Console",
                "outputTemplate": "[{Timestamp:yyyy-MM-dd HH:mm:ss.fff}] [{Level:u3}] [TID:{ThreadId}] - {Message:lj}{NewLine}{Exception}"
              },
              {
                "Name": "Debug",
                "outputTemplate": "[{Timestamp:yyyy-MM-dd HH:mm:ss.fff}] [{Level:u3}] [TID:{ThreadId}] - {Message:lj}{NewLine}{Exception}"
              },
              {
                "Name": "AzureTableStorage",
                "Args": {
                  "storageTableName": "HeroFunctionsLogs",
                  "connectionString": "DefaultEndpointsProtocol=https;AccountName=herobugari;AccountKey=NYJcdoCg9mQxqbQaTUdIxOHYQGdcKAwMsuWwzDub29UweHR1c+wd6Sh3IDQNB+eCx3DAe/ccobxu67sJvqQB5g==",
                  "outputTemplate": "[{Timestamp:yyyy-MM-dd HH:mm:ss.fff}] [{Level:u3}] [TID:{ThreadId}] - {Message:lj}{NewLine}{Exception}",
                  "restrictedToMinimumLevel": "Information",
                  "writeInBatches": true,
                  "batchPostingLimit": 100
                }
              },
              {
                "Name": "RollingFile",
                "Args": {
                  "pathFormat": "logs\\Bulgari.Hero.Functions.log",
                  "retainedFileCountLimit": 10,
                  "buffered": true,
                  "flushToDiskInterval": 5,
                  "outputTemplate": "[{Timestamp:yyyy-MM-dd HH:mm:ss.fff}] [{Level:u3}] [TID:{ThreadId}] - {Message:lj}{NewLine}{Exception}"
                }
              }
            ],
            "Filter": [
              {
                "Name": "ByExcludingOnly",
                "Args": {
                  "expression": "SourceContext like '%Microsoft.EntityFrameworkCore%'"
                }
              }
            ]
          }
        }
      }
    ]
  }

这是读取并尝试使用它的 Startup.cs 代码：

    var config = new ConfigurationBuilder()
            .SetBasePath(Environment.CurrentDirectory)
        .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
        .AddEnvironmentVariables().Build();
    // Registering Serilog provider
    logger = new LoggerConfiguration()
        //.WriteTo.Console()
        //.WriteTo.File("logs\\herofunctions.log", rollingInterval: RollingInterval.Day)
        .ReadFrom.Configuration(config)
        .CreateLogger();
    builder.Services.AddLogging(lb => lb.AddSerilog(logger));

记录器对象没有在问题中注册的“接收器”。

Answer 3

我在这里通过在 local.settings.json 中添加条目解决了完全相同的问题。

"Serilog:Using:0": "Serilog.Sinks.Console",
"Serilog:MinimumLevel": "Information",
"Serilog:Override:Microsoft": "Warning",
"Serilog:Override:System": "Warning",
"Serilog:WriteTo:Console:Name": "Console"

然后在 StartUp.cs 中：

var provider = builder.Services.BuildServiceProvider();
var config = provider.GetRequiredService<IConfiguration>();
Log.Logger = new LoggerConfiguration().ReadFrom.Configuration(config).CreateLogger();

然后是函数：

public class TestFunction
{
    private readonly ILogger _logger;
    public TestFunction()
    {
        _logger = Log.Logger;
    }

    [FunctionName("TestFunction")]
    public async Task<IActionResult> Run(
        [HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = null)] HttpRequest req)
    {
        _logger.Information("Hello");
        return new OkResult();
    }
}

}

我可以看到已注册的配置条目并记录了条目！