问题描述
Web App 发布后, Application Insights 收集不到数据了
问题分析
在应用服务(App Service)中收集应用的监控数据(如Request，Exception，Trace等）时通过Agent(Application Insight Site Extension)来实现的。因更新迭代的关系，有些版本不再，或还没有被支持。如Agent(Application Insight Site Extension 2.8.38)支持.NET Core 2.1 and 3.1, 而 .Net Core 2.2不再被继续支持，而.Net 5却还没有被支持。
解决办法
一：使用基于代理（agent-based)模式修改.Net Core的版本和Application Agent版本。如：
- ApplicationInsightsAgent_EXTENSIONVERSION=~2 同时 升级至.NET Core 3.1
- ApplicationInsightsAgent_EXTENSIONVERSION=2.8.37 同时 继续使用.NET Core 2.2
二：使用基于代码模式的Application Insighs:
- 升级至.NET 5 并更新项目依赖：https://docs.microsoft.com/en-us/azure/azure-monitor/app/asp-net-core
2.1 安装Application Insights SDK，建议一直使用最新的稳定版 Application Insights SDK NuGet package for ASP.NET Core。打开项目中的.csproj文件，以如下示例为参考添加Package引用。
<ItemGroup>
<PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.16.0" />
</ItemGroup>
2.2 在项目的Startup类中的 ConfigureServices()方法中，添加 services.AddApplicationInsightsTelemetry()。启动Application Insights
// This method gets called by the runtime. Use this method to add services to the container. public void ConfigureServices(IServiceCollection services) { // The following line enables Application Insights telemetry collection. services.AddApplicationInsightsTelemetry(); // This code adds other services for your application. services.AddMvc(); }
2.3 设置Application Insights的 instrumentation Connection String。 这里有多种方式来设置Connection String， Connection String的值由Azure Application门户提供
a) 使用系统级环境变量
在系统中添加环境变量参数：APPLICATIONINSIGHTS_CONNECTION_STRING。
b) 在代码设置，使用TelemetryConfiguration对象或ApplicationInsightsServiceOptions
// This method gets called by the runtime. Use this method to add services to the container. public void ConfigureServices(IServiceCollection services) { var configuration = new TelemetryConfiguration { ConnectionString = "InstrumentationKey=00000000-0000-0000-0000-000000000000;" }; // The following line enables Application Insights telemetry collection. services.AddApplicationInsightsTelemetry(configuration); // This code adds other services for your application. services.AddMvc(); }
或者
public void ConfigureServices(IServiceCollection services) { var options = new ApplicationInsightsServiceOptions { ConnectionString = "InstrumentationKey=00000000-0000-0000-0000-000000000000;" }; services.AddApplicationInsightsTelemetry(options: options); }
c) 使用配置文件(官方推荐方式)
XML
<?xml version="1.0" encoding="utf-8"?> <ApplicationInsights xmlns="http://schemas.microsoft.com/ApplicationInsights/2013/Settings"> <ConnectionString>InstrumentationKey=00000000-0000-0000-0000-000000000000</ConnectionString> </ApplicationInsights>
JSON(config.json)
{ "ApplicationInsights": { "ConnectionString" : "InstrumentationKey=00000000-0000-0000-0000-000000000000;" } }
参考资料
How to set a connection string: https://docs.microsoft.com/en-us/azure/azure-monitor/app/sdk-connection-string?tabs=net#how-to-set-a-connection-string
Enable Application Insights server-side telemetry (no Visual Studio): https://docs.microsoft.com/en-us/azure/azure-monitor/app/asp-net-core#enable-application-insights-server-side-telemetry-no-visual-studio
Enable agent-based monitoring:https://docs.microsoft.com/en-us/azure/azure-monitor/app/azure-web-apps?tabs=netcore#enable-agent-based-monitoring
Microsoft.ApplicationInsights.AspNetCore package: https://www.nuget.org/packages/Microsoft.ApplicationInsights.AspNetCore
