为什么ILogger没有登录到Azure app Insights？

Question

我正在直接测试控制台应用程序的代码:https://docs.microsoft.com/en-us/azure/azure-monitor/app/ilogger#

我基本上复制了代码，并将其指向一个新的azure app insights实例。然而，这些日志都没有出现在app Insights中。我错过什么了吗？

 static void Main(string[] args)
        {
            // Create DI container.
            IServiceCollection services = new ServiceCollection();

            // Add the logging pipelines to use. We are using Application Insights only here.
            services.AddLogging(loggingBuilder =>
            {
                // Optional: Apply filters to configure LogLevel Trace or above is sent to ApplicationInsights for all
                // categories.
                loggingBuilder.AddFilter<ApplicationInsightsLoggerProvider>("", LogLevel.Trace);
                loggingBuilder.AddApplicationInsights(******);
            });

            // Build ServiceProvider.
            IServiceProvider serviceProvider = services.BuildServiceProvider();

            ILogger<Program> logger = serviceProvider.GetRequiredService<ILogger<Program>>();


            logger.LogCritical("critical message working");
            // Begin a new scope. This is optional. Epecially in case of AspNetCore request info is already
            // present in scope.
            using (logger.BeginScope(new Dictionary<string, object> { { "Method", nameof(Main) } }))
            {
                logger.LogWarning("Logger is working - warning"); // this will be captured by Application Insights.

            }
        }

Answer 1

代码是正确的，但您遇到了ApplicationInsights和控制台应用程序的一个已知问题-应用程序在ApplicationInsights将数据发送到后端之前就已经死亡。（数据不是立即发送的，而是批处理，每隔一段时间发送。）

增加一个大约30秒的睡眠应该有助于你的情况。Thread.Sleep（31000）；

在常规的控制台应用程序中，文档建议做一个明确的冲水。https://docs.microsoft.com/en-us/Azure/Azure-monitor/app/console#完整示例

class Program
    {
        static void Main(string[] args)
        {
            // Create DI container.
            IServiceCollection services = new ServiceCollection();

            var channel = new InMemoryChannel();

            services.Configure<TelemetryConfiguration>(
              (config) =>
                {
                    config.TelemetryChannel = channel;                    
                }
           );

            // Add the logging pipelines to use. We are using Application Insights only here.
            services.AddLogging(loggingBuilder =>
            {
                // Optional: Apply filters to configure LogLevel Trace or above is sent to ApplicationInsights for all
                // categories.
                loggingBuilder.AddFilter<ApplicationInsightsLoggerProvider>("", LogLevel.Trace);
                loggingBuilder.AddApplicationInsights("***");
            });

            // Build ServiceProvider.
            IServiceProvider serviceProvider = services.BuildServiceProvider();

            ILogger<Program> logger = serviceProvider.GetRequiredService<ILogger<Program>>();


            logger.LogCritical("critical message working");
            // Begin a new scope. This is optional. Epecially in case of AspNetCore request info is already
            // present in scope.
            using (logger.BeginScope(new Dictionary<string, object> { { "Method", nameof(Main) } }))
            {
                logger.LogWarning("Logger is working - warning"); // this will be captured by Application Insights.

            }

            channel.Flush();
            Thread.Sleep(1000);            
        }
    }