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前提條件

完成vpce接入。

背景信息

Jaeger是Uber推出的一款開源分布式追蹤系統，兼容OpenTracing API，已在Uber大規模使用，且已加入CNCF開源組織。其主要功能是聚合來自各個異構系統的實時監控數據。

接入步驟

1、安裝依賴包

dotnet?add??package?Jaeger
dotnet?add??package?OpenTracing
dotnet?add??package?OpenTracing.Contrib.NetCore

2、查看接入點信息

應用列表的接入指引會根據您所在資源池提供“通過 HTTP 上報數據”的ENDPOINT(天翼云vpc網絡接入點)、鑒權TOKEN信息。

3、初始化SDK并設置exporters

新建文件JaegerServiceCollectionExtensions.cs，代碼如下

using?System;
using?System.Reflection;
using?Jaeger;
using?Jaeger.Reporters;
using?Jaeger.Samplers;
using?Jaeger.Senders.Thrift;
using?Microsoft.Extensions.Logging;
using?OpenTracing;
using?OpenTracing.Contrib.NetCore.Configuration;
using?OpenTracing.Util;


namespace?Microsoft.Extensions.DependencyInjection
{
????public?static?class?JaegerServiceCollectionExtensions
????{
????????private?static?readonly?Uri?_jaegerUri?=?new?Uri("endpoint");?//替換為上報數據的Endpoint

????????public?static?IServiceCollection?AddJaeger(this?IServiceCollection?services)
????????{
????????????if?(services?==?null)
????????????????throw?new?ArgumentNullException(nameof(services));

????????????services.AddSingleton<ITracer>(serviceProvider?=>
????????????{
????????????????var?serviceName?=?"";????//修改為自定義的服務名

????????????????//ILoggerFactory?loggerFactory?=?serviceProvider.GetRequiredService<ILoggerFactory>();

????????????????var?loggerFactory?=?LoggerFactory.Create(builder?=>??
????????????????{??
????????????????????//?添加控制臺日志提供程序??
????????????????????builder.AddConsole();??
????????????????????//?（可選）其他配置，例如設置日志級別??
????????????????????//?builder.SetMinimumLevel(LogLevel.Debug);??
????????????????});

????????????????ISampler?sampler?=?new?ConstSampler(sample:?true);

????????????????
????????????????//將token替換為自己的鑒權token
????????????????IReporter?reporter?=?new?RemoteReporter.Builder()
????????????????????.WithSender(new?HttpSender.Builder(_jaegerUri.ToString()).WithAuth("token").Build())
????????????????????.Build();

???????????????
????????????????//IReporter?reporter?=?new?LoggingReporter(loggerFactory);
???????????????
????????????????ITracer?tracer?=?new?Tracer.Builder(serviceName)
????????????????????.WithLoggerFactory(loggerFactory)
????????????????????.WithSampler(sampler)
????????????????????.WithReporter(reporter)
????????????????????.Build();

????????????????GlobalTracer.Register(tracer);

????????????????return?tracer;
????????????});

????????????//?Prevent?endless?loops?when?OpenTracing?is?tracking?HTTP?requests?to?Jaeger.
????????????services.Configure<HttpHandlerDiagnosticOptions>(options?=>
????????????{
????????????????options.IgnorePatterns.Add(request?=>?_jaegerUri.IsBaseOf(request.RequestUri));
????????????});
???????????

????????????return?services;
????????}
????}
}

4、開啟鏈路跟蹤

using?Jaeger;
using?Jaeger.Reporters;
using?Jaeger.Samplers;
using?Microsoft.Extensions.Logging;


var?builder?=?WebApplication.CreateBuilder(args);

builder.Services.AddJaeger();????????//ITracer對象的初始化和注冊
builder.Services.AddOpenTracing();???//開啟Http鏈路

builder.Services.AddControllers();

var?app?=?builder.Build();

app.MapControllers();

app.Run();