【问题标题】:How to create a Custom text formatter for Cloudwatch?如何为 Cloudwatch 创建自定义文本格式化程序?
【发布时间】:2019-01-08 09:37:43
【问题描述】:

如前所述,我不明白如何为 Amazon Cloudwatch 创建自定义文本格式化程序:

var formatter = new MyCustomTextFormatter();

我正在尝试将 Serilog 日志写入 Amazon CloudWatch 而不是本地硬盘。为此,我正在关注此回购:

https://github.com/Cimpress-MCP/serilog-sinks-awscloudwatch

private readonly ITextFormatter textFormatter;

public ILoggerFactory ConfigureLogger()
{
    LoggerFactory factory = new LoggerFactory();

    var logGroupName = "myLoggrouName";
    var region = Amazon.RegionEndpoint.EUWest1;
    var client = new AmazonCloudWatchLogsClient(region);
   //var formatter = new MyCustomTextFormatter();

    var options = new CloudWatchSinkOptions()
    {
        LogGroupName = logGroupName,
        //TextFormatter = formatter,
     
        MinimumLogEventLevel = LogEventLevel.Information,
        BatchSizeLimit = 100,
        QueueSizeLimit = 10000,
        Period = TimeSpan.FromSeconds(10),
        CreateLogGroup = true,
        LogStreamNameProvider = new DefaultLogStreamProvider(),
        RetryAttempts = 5
    };

      Log.Logger = new LoggerConfiguration()
            .WriteTo.AmazonCloudWatch(options, client)
            .CreateLogger();

    return factory;
}

能够将 Serilog 写入 Cloudwatch。

【问题讨论】:

    标签: c# .net-core amazon-cloudwatch serilog text-formatting


    【解决方案1】:

    我今天通过了同样的情况,我发现自定义格式化程序 - 默认情况下没有设置 - 它用于设置日志的写入方式,因此它将出现在 AWS 日志中。

    您可以使用 Serilog 提供的界面开始创建简单的格式化程序,并根据您的情况进行调整。

    public class AWSTextFormatter : ITextFormatter
    {
        public void Format(LogEvent logEvent, TextWriter output)
        {
            output.Write("Timestamp - {0} | Level - {1} | Message {2} {3}", logEvent.Timestamp, logEvent.Level, logEvent.MessageTemplate, output.NewLine);
            if (logEvent.Exception != null)
            {
                output.Write("Exception - {0}", logEvent.Exception);
            }
        }
    }
    

    使用它

    var customFormatter = new AWSTextFormatter();
    
     var options = new CloudWatchSinkOptions
    {
      // the name of the CloudWatch Log group for logging
      LogGroupName = logGroupName,
    
      // the main formatter of the log event
      TextFormatter = customFormatter,
    
      // other defaults defaults
      MinimumLogEventLevel = LogEventLevel.Information,
      BatchSizeLimit = 100,
      QueueSizeLimit = 10000,
      Period = TimeSpan.FromSeconds(10),
      CreateLogGroup = true,
      LogStreamNameProvider = new DefaultLogStreamProvider(),
      RetryAttempts = 5
    };
    

    在该方法中,您可以访问 LogEvent 并获取所需的所有信息。这个和他们在lib中使用的类似,写了事件、异常和一些细节。

    建议是在本地测试自定义格式化程序,将日志写入某个文件

    Log.Logger = new LoggerConfiguration()
         .MinimumLevel.Debug()
         .WriteTo.RollingFile(customFormatter, Path.Combine(env.ContentRootPath, "Logs", "Log-{Date}.txt"))
         .WriteTo.AmazonCloudWatch(options, client)
         .CreateLogger();
    

    日志显示的内容:

    Timestamp - 1/9/2019 11:52:11 AM -02:00 | Level - Fatal | Message PROBLEM STARTING 
     APPLICATION 
     Exception - Couchbase.Configuration.Server.Serialization.BootstrapException: Could not 
     bootstrap - check inner exceptions for details.
    

    【讨论】:

      【解决方案2】:

      您也可以使用 Serilog 的默认 Json 格式化程序。

      using Serilog.Formatting.Json;
      

      然后:

      TextFormatter = new JsonFormatter(Environment.NewLine);
      

      【讨论】:

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