在 Azure 门户中的何处可以找到自定义指标

Where to find custom metrics in Azure Portal

我正在尝试将自定义指标发送到 Azure 门户中给定检测密钥的应用服务。作为后台服务的一部分,我在 .NET Core 中有以下代码 运行:

public override async Task StartAsync(CancellationToken stoppingToken)
{
    try
    {
        TelemetryClient telemetry = new TelemetryClient();
        telemetry.TrackEvent("new event");
        var sample = new MetricTelemetry();
        sample.Name = "metric name";
        sample.Value = 42.3;
        telemetry.TrackMetric(sample);
        telemetry.Flush();
    }
    catch (Exception e)
    {
        _logger.LogError($"{e.Message} {e.StackTrace}");
    }
}

本示例代码来自here.

但是我不确定这些指标是否到达了 Azure 实例或在哪里寻找它们。我转到 Application Insights > MyInstance > Logs 并在其中找到一个名为 'customEvents' 的 table。但是我无法查询它。在“指标”选项卡上,我只获得默认指标命名空间,它显示 Azure 中可用的默认指标,但没有任何新的自定义指标。

在我的初创公司中,我确实有

 services.AddApplicationInsightsTelemetry();

正如您所说,您正在使用后台工作者

  1. 安装包 nuget Microsoft.ApplicationInsights.WorkerService
  2. 在你的启动中:
  • public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureServices((hostContext, services) =>
                {
                   .....
                    services.AddApplicationInsightsTelemetryWorkerService();
                });
    

简单的查找方法是转到应用洞察交易搜索并搜索事件名称

然后你点击事件,你会去下一个视图

这就是我检查您的事件是否实际记录的方式。

我也只是运行查询

customMetrics
| where name == "metric name"

customEvents
| where name == "Error.PageNotFound"

我认为问题是您使用这行代码创建了一个新的 telemetry clientTelemetryClient telemetry = new TelemetryClient();,但是新的 telemetry client 没有配置 InstrumentationKey .然后 custom events / custom metrics 不使用 telemetry.TrackEvent / telemetry.TrackMetric 方法发送。

您应该像下面 Worker.cs 中那样更改它:

namespace WorkerService3
{
    public class Worker : BackgroundService
    {
        private readonly ILogger<Worker> _logger;

        //define a telemetry client here, and use it in your following code
        private TelemetryClient telemetry;

        public Worker(ILogger<Worker> logger, TelemetryClient tc)
        {
            _logger = logger;
            telemetry = tc;
        }

        public override async Task StartAsync(CancellationToken stoppingToken)
        {
            try
            {
                //do not create a another telemetry client, use the one defined in class-level.
                //TelemetryClient telemetry = new TelemetryClient();
                telemetry.TrackTrace("StartAsync: new message");
                telemetry.TrackEvent("StartAsync: new event");
                var sample = new MetricTelemetry();
                sample.Name = "StartAsync metric name";
                sample.Value = 11.55;
                telemetry.TrackMetric(sample);
                telemetry.Flush();
            }
            catch (Exception e)
            {
                _logger.LogError($"{e.Message} {e.StackTrace}");
            }

        }

        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
        {
           //other code
        }
    }
}

这是我的 Program.cs:

namespace WorkerService3
{
    public class Program
    {
        public static void Main(string[] args)
        {
            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureServices((hostContext, services) =>
                {
                    services.AddHostedService<Worker>();
                    services.AddApplicationInsightsTelemetryWorkerService();
                });
    }
}

这是我的 appsettings.json:

{
  "ApplicationInsights": {
    "InstrumentationKey": "your application insights InstrumentationKey"
  },
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  }
}

代码执行后,稍等几分钟,我可以在azure portal -> my application insights -> Logs中搜索custom metrics / custom events(对于自定义事件,查询customEvents table):