Azure Functions Application Insights：ILogger 消息未出现在日志中

Question

我有两个 Azure Functions：一个使用持久编排，另一个使用队列触发器。这两个函数都利用 ILogger 通过 log.LogInformation 和 log.LogWarning 进行日志记录，并且还具有 Console.WriteLine 语句用于输出。

当我部署并触发这两个函数应用程序时，我可以在 Azure 门户的“监控”->“日志流”部分中看到日志信息和控制台值。但是，当我尝试通过 Application Insights 导出这些日志时，遇到了问题。

在 Application Insights -> Logs 中，我运行以下查询来检索日志：

union isfuzzy=true
    availabilityResults,
    requests,
    exceptions,
    pageViews,
    traces,
    customEvents,
    dependencies
| order by timestamp desc

我获得了日志详细信息列表，但只有 Console.WriteLine 消息可用。 log.LogInformation 消息丢失。

我的 host.json 文件配置了以下日志级别：

{
  "version": "2.0",
  "logging": {
    "logLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  }
}

尽管如此，log.LogInformation 条目并未出现在 Application Insights 中。以下是我的 Program.cs 配置，用于在 .NET 隔离进程中设置 Application Insights：

using Microsoft.Azure.Functions.Worker;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using System.Text.Json;
using System.Text.Json.Serialization;

var host = new HostBuilder()

    .ConfigureFunctionsWorkerDefaults()

    .ConfigureServices(services =>
    {

        services.Configure<JsonSerializerOptions>(options =>
        {
            options.Converters.Add(new JsonStringEnumConverter());
            options.DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull; // Ignore null values during serialization
        });
       
        services.AddApplicationInsightsTelemetryWorkerService();
        services.ConfigureFunctionsApplicationInsights();
       

    })
    .ConfigureAppConfiguration((context, config) =>
    {
        config.AddJsonFile("local.settings.json", optional: true, reloadOnChange: true);
        config.AddEnvironmentVariables();
    })

    .Build();


host.Run();

示例功能

namespace serviceBus.QueueTrigger
{
    public class ServiceBusQueueTrigger
    {
        private readonly ILogger<ServiceBusQueueTrigger> logger;
        public ServiceBusQueueTrigger(ILoggerFactory loggerFactory)
        {
            logger = loggerFactory.CreateLogger<ServiceBusQueueTrigger>();
        }
       
        [Function(nameof(ServiceBusQueueTrigger))]
        public async Task Run(
            [ServiceBusTrigger("baseloadqueue", Connection = "serviceBusConnectionString")]
            ServiceBusReceivedMessage message,
            ServiceBusMessageActions messageActions)
        {
          
            logger.LogInformation("queue triggered");
        }
    }
}

我期待任何解决方案来获取我的函数应用程序的日志文件 现在我正在尝试导出应用程序洞察力以获取日志文件 获取我们项目的日志文件的任何其他方式对我来说也可以。

Answer 1

在 Program.cs 中添加遥测日志记录配置。

使用下面修改后的代码将 ILogger 消息记录到应用程序洞察中。

程序.cs：

var host = new HostBuilder()
    .ConfigureFunctionsWebApplication()
    .ConfigureServices((context, config_services) =>
    {
        IConfiguration config = context.Configuration;
        config_services.AddLogging(loggingBuilder =>
        {
            var con_strg = config["kpconnstring"];
            var kplogconfig = new LoggerConfiguration()
                .MinimumLevel.Information()
                .Enrich.FromLogContext();
            kplogconfig.WriteTo.ApplicationInsights(con_strg, TelemetryConverter.Traces);
            loggingBuilder.AddSerilog(kplogconfig.CreateLogger());
        });
        config_services.AddApplicationInsightsTelemetryWorkerService();
        config_services.ConfigureFunctionsApplicationInsights();
    })
    .ConfigureAppConfiguration((context, configBuilder) =>
    {
        configBuilder.AddJsonFile("local.settings.json", optional: true, reloadOnChange: true);
    })
    .Build();
host.Run();

主机.json：

{
  "version": "2.0",
  "logging": {
    "fileLoggingMode": "always",
    "logLevel": {
      "default": "Information"
    },
    "applicationInsights": {
      "samplingSettings": {
        "isEnabled": false,
        "excludedTypes": "Request"
      },
      "enableLiveMetricsFilters": true
    }
  }
}

local.settings.json：

{
  "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "UseDevelopmentStorage=true",
    "FUNCTIONS_WORKER_RUNTIME": "dotnet-isolated",
    "SBconnection": "<Service_Bus_connection_string>",
    "Application_insights": "<Application_insights_connection_string>"
  }
}

功能代码：

private readonly ILogger<Function1> _logger;

public Function1(ILogger<Function1> logger)
{
    _logger = logger;
}

[Function(nameof(Function1))]
public async Task Run(
    [ServiceBusTrigger("queue1", Connection = "demo")]
    ServiceBusReceivedMessage message,
    ServiceBusMessageActions messageActions)
{
    _logger.LogInformation("Message ID: {id}", message.MessageId);
    _logger.LogInformation("Message Body: {body}", message.Body);
    _logger.LogInformation("Message Content-Type: {contentType}", message.ContentType);
    await messageActions.CompleteMessageAsync(message);
}

Ilogger

日志将作为跟踪存储在应用程序洞察中。

• 使用以下查询来获取日志：

union isfuzzy=true
    availabilityResults,
    requests,
    exceptions,
    pageViews,
    traces,
    customEvents,
    dependencies
| where timestamp > datetime("2024-07-21T10:52:11.299Z") and timestamp < datetime("2024-07-22T10:52:11.299Z")
| order by timestamp desc
| take 100

• 能够将 Ilogger 消息记录到应用程序洞察中，如下所示：