如何在Application Insights中跟踪Azure WebJobs中的自定义事件？

Question

我有一个Azure WebJobs（v2.2.0）项目，我想用Application Insights（AI）监视，并且有一些我希望能够跟踪的事件。在配置为使用AI的普通Web应用程序中，您可以使用：

TelemetryClient tc = new TelemetryClient();
tc.TrackEvent("EventName");

然而，这似乎不适用于WebJob的上下文！我按照WebJob SDK repo上的说明配置了我的WebJob项目，最终看起来像这样：

Program

using System.Configuration;
using System.Diagnostics;
using Microsoft.Azure.WebJobs;
using Microsoft.Extensions.Logging;

namespace WebJobs
{
  public class Program
  {
    public static void Main()
    {
      JobHostConfiguration config = new JobHostConfiguration();
      config.UseTimers();

      using (LoggerFactory loggerFactory = new LoggerFactory())
      {
        string key = ConfigurationManager.AppSettings["webjob-instrumentation-key"];
        loggerFactory.AddApplicationInsights(key, null);
        loggerFactory.AddConsole();
        config.LoggerFactory = loggerFactory;
        config.Tracing.ConsoleLevel = TraceLevel.Off;

        if (config.IsDevelopment)                
          config.UseDevelopmentSettings();                

        JobHost host = new JobHost(config);

        host.RunAndBlock();
      }
    } 
  }
}

Functions

这只是一个测试功能，每分钟运行半小时。

using Core.Telemetry;
using Microsoft.ApplicationInsights;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Timers;
using System;
using System.Collections.Generic;

namespace WebJobs.Functions
{
  public class TestFunctions
  {
    public void TelemetryTest([TimerTrigger(typeof(Schedule))] TimerInfo timer)
    {
      TelemetryClient tc = new TelemetryClient();
      tc.TrackEvent("TelemetryTestEvent");
    }

    // schedule that will run every minute
    public class Schedule : DailySchedule
    {
        private static readonly string[] times =
        {
          "12:01","12:02","12:03","12:04","12:05","12:06","12:07","12:08","12:09","12:10",
          "12:11","12:12","12:13","12:14","12:15","12:16","12:17","12:18","12:19","12:20",
          "12:21","12:22","12:23","12:24","12:25","12:26","12:27","12:28","12:29","12:30"
        };

        public Schedule() : base(times) { }
    }
  }
}

这似乎部分起作用，我可以在AI中看到一些遥测，但不能看到自定义事件。例如，我可以看到每次TestFunctions.TelemetryTest()运行时出现的请求以及在WebJob初始化期间的各种跟踪。

我可能没有正确配置或没有以正确的方式获取TelemetryClient，但我找不到任何关于在WebJobs中跟踪自定义事件的文档。

任何帮助，将不胜感激。

Answer 1

尝试显式设置instrumentationkey：

tc.Context.InstrumentationKey = "<your_key>";

根据the docs，您应该可以使用密钥

System.Environment.GetEnvironmentVariable(
            "APPINSIGHTS_INSTRUMENTATIONKEY", EnvironmentVariableTarget.Process)

如果您已设置应用程序洞察集成。