如何从控制台应用程序跟踪MongoDB请求

Question

我有一个用C#编写的Console Application项目,我已经使用以下NuGet包添加了Application Insights.

Microsoft.ApplicationInsights
Microsoft.ApplicationInsights.Agent.Intercept
Microsoft.ApplicationInsights.DependencyCollector
Microsoft.ApplicationInsights.NLogTarget
Microsoft.ApplicationInsights.PerfCounterCollector
Microsoft.ApplicationInsights.Web
Microsoft.ApplicationInsights.WindowsServer
Microsoft.ApplicationInsights.WindowsServer.TelemetryChannel

我已经在配置文件中配置了InstrumentationKey,并且我在启动时使用以下代码启动了TelemetryClient:

var telemetryClient = new TelemetryClient();
telemetryClient.Context.User.Id = Environment.UserName;
telemetryClient.Context.Session.Id = Guid.NewGuid().ToString();
telemetryClient.Context.Device.OperatingSystem = Environment.OSVersion.ToString();

一切都运行良好,除了AI没有捕获任何发送到Mongo的请求,我可以看到请求在"应用程序映射"中发送到SQL服务器,但没有任何其他外部请求的迹象.有什么方法可以看到对Mongo提出的请求的遥测？

编辑 - 感谢Peter Bons,我最终得到了以下几个像魅力一样的东西,让我能够区分成功和失败:

var telemetryClient = new TelemetryClient();
var connectionString = connectionStringSettings.ConnectionString;
var mongoUrl = new MongoUrl(connectionString);
var mongoClientSettings = MongoClientSettings.FromUrl(mongoUrl);

mongoClientSettings.ClusterConfigurator = clusterConfigurator =>
{
    clusterConfigurator.Subscribe<CommandSucceededEvent>(e =>
    {
        telemetryClient.TrackDependency("MongoDB", e.CommandName, DateTime.Now.Subtract(e.Duration), e.Duration, true);
    });

    clusterConfigurator.Subscribe<CommandFailedEvent>(e =>
    {
        telemetryClient.TrackDependency("MongoDB", $"{e.CommandName} - {e.ToString()}", DateTime.Now.Subtract(e.Duration), e.Duration, false);
    });
};

var mongoClient = new MongoClient(mongoClientSettings);

Answer 1

我不熟悉MongoDB,但据我所知,在Application Insights方面没有默认支持.但这并不意味着你不能这样做,它只会涉及更多的代码.

同样,我不熟悉MongoDB,但根据http://www.mattburkedev.com/logging-queries-from-mongodb-c-number-driver/,内置支持记录生成的查询.现在,我们只需要将其与Application Insights联系起来.

由于您已经知道如何使用,TelemetryClient我们可以使用该类提供的自定义跟踪方法.有关可用的自定义跟踪方法,请参阅https://docs.microsoft.com/nl-nl/azure/application-insights/app-insights-api-custom-events-metrics.

您需要做的就是插入一些代码:

telemetryClient.TrackDependency(
    "MongoDB",               // The name of the dependency
    query,                   // Text of the query
    DateTime.Now,            // Time that query is executed
    TimeSpan.FromSeconds(0), // Time taken to execute query
    true);                   // Indicates success

该类telemetryClient是线程安全的,因此您可以重用它.

现在,根据引用的博客文章,您应该能够做到这样的事情:

var client = new MongoClient(new MongoClientSettings()
{
    Server = new MongoServerAddress("localhost"),
    ClusterConfigurator = cb =>
    {
        cb.Subscribe<CommandStartedEvent>(e =>
        {
            telemetryClient.TrackDependency(
                "MongoDB",               // The name of the dependency
                e.Command.ToJson()       // Text of the query
                DateTime.Now,            // Time that query is executed
                TimeSpan.FromSeconds(0), // Time taken to execute query
                true);                   // Indicates success
        });
    }
});

同样,我对MongoDB并不熟悉,但我希望这是一个关于如何根据您的MongoDB知识使其适应您需求的想象力的起点.

编辑:

如果还有一个CommandCompletedEvent或类似的事件而不是CommandStartedEvent事件你应该跟踪那里的依赖,因为你应该能够计算(或简化读取)花费的时间,并可能获得成功指标的实际值.