aws-logging-dotnet 在运行时检索 AWS Logger LogStreamName 值

Question

我正在使用 aws-logging-dotnet 库将应用程序日志写入 AWS Cloudwatch。

记录器是通过 json 文件配置的：

{
  "Serilog": {
    "Using": [ "AWS.Logger.SeriLog", "Serilog.Exceptions" ],

    "MinimumLevel": {
      "Default": "Information",
      "Override": {
        "Hangfire": "Warning",
        "Microsoft.AspNetCore": "Warning",
        "Serilog.AspNetCore": "Warning",
        "System": "Warning"
      }
    },
    "Enrich": [ "WithMachineName", "WithProcessId", "WithProcessName", "FromLogContext", "WithExceptionDetails" ],
    "Properties": {
      "Application": "My Application Name"
    },
    "Region": "My AWS Region", 
    "LogGroup": "My AWS LogGroup", 
    "WriteTo": [
      {
        "Name": "Console",
        "Args": {
          "outputTemplate": "[{SourceContext}] [{Timestamp:HH:mm:ss} {Level:u3}] {Message:lj}{NewLine}{Exception}"
        }
      }
    ],
    "WriteTo:Async": {
      "Name": "Async",
      "Args": {
        "configure": [
          {
            "Name": "AWSSeriLog",
            "Args": {
              "textFormatter": "Serilog.Formatting.Compact.CompactJsonFormatter, Serilog.Formatting.Compact"
            }
          }
        ]
      }
    }
  }
}

应用程序开始登录 AWS CW 后，它会创建一个专用流，如下所示：

我有兴趣获取 LogStreamName 的运行时值。 该应用程序在许多节点上运行，因此每个实例都登录到自己的流中。

我可以看到 LogStreamName 名称是由记录器内部管理的。然而似乎没有办法获得这个值。

https://github.com/aws/aws-logging-dotnet/blob/d59d7c855d5bccc4fd60d3435893152dfbf11b17/src/AWS.Logger.Core/Core/AWSLoggerCore.cs#L605C26-L605C40

public PutLogEventsRequest _request = new PutLogEventsRequest();
            public LogEventBatch(string logGroupName, string streamName, int timeIntervalBetweenPushes, int maxBatchSize)
            {
                _request.LogGroupName = logGroupName;
                _request.LogStreamName = streamName;
                TimeIntervalBetweenPushes = TimeSpan.FromSeconds(timeIntervalBetweenPushes);
                MaxBatchSize = maxBatchSize;
                Reset(null);
            }

在我发明黑客解决方案之前，有谁知道是否有一种干净的方式来阅读它？

Answer 1

简短的回答是否定的。 日志流名称由 AWSLoggerCore 类内部管理。 也没有办法覆盖它。

但是有一个开放请求：https://github.com/aws/aws-logging-dotnet/issues/195

您可以考虑选择此替代库：serilog-sinks-awscloudwatch https://github.com/Cimpress-MCP/serilog-sinks-awscloudwatch

这使您可以通过实现自己的 LogStreamNameProvider 来设置您喜欢的日志流名称：

var options = new CloudWatchSinkOptions
  {
    // the name of the CloudWatch Log group for logging
    LogGroupName = logGroupName,

    // the main formatter of the log event
    TextFormatter = formatter,
    
    // other defaults defaults
    MinimumLogEventLevel = LogEventLevel.Information,
    BatchSizeLimit = 100,
    QueueSizeLimit = 10000,
    Period = TimeSpan.FromSeconds(10),
    CreateLogGroup = true,
    LogStreamNameProvider = new MyLogStreamProvider(),
    RetryAttempts = 5
  };

...

    public class MyLogStreamProvider : ILogStreamNameProvider
    {
        private readonly string DATETIME_FORMAT = "yyyy-MM-dd-hh-mm-ss";

        // Customise your log stream name
        public string GetLogStreamName()
        {
            return $"{DateTime.UtcNow.ToString(DATETIME_FORMAT)}_{Dns.GetHostName()}_{Guid.NewGuid()}";
        }
    }