ASP.NET Core 는 Jaeger 를 이용 하여 분포 식 추적 상세 해 를 실현 합 니 다.

version: '3.4'

services:
 aservice:
 image: ${DOCKER_REGISTRY-}aservice
 build:
 context: .
 dockerfile: AService/Dockerfile
 ports:
 - "9898:80" 
 depends_on:
 - jagerservice
 - bservice
 networks: 
 backend:
 
 bservice:
 image: ${DOCKER_REGISTRY-}bservice
 build:
 context: .
 dockerfile: BService/Dockerfile
 ports:
 - "9899:80"
 depends_on:
 - jagerservice 
 networks: 
 backend:
 
 jagerservice:
 image: jaegertracing/all-in-one:latest
 environment:
 - COLLECTOR_ZIPKIN_HTTP_PORT=9411 
 ports:
 - "5775:5775/udp"
 - "6831:6831/udp"
 - "6832:6832/udp"
 - "5778:5778"
 - "16686:16686"
 - "14268:14268"
 - "9411:9411"
 networks: 
 backend:
 
networks: 
 backend: 
 driver: bridge

public void ConfigureServices(IServiceCollection services)
{
 // others ....
 
 // Adds opentracing
 services.AddOpenTracing();

 // Adds the Jaeger Tracer.
 services.AddSingleton<ITracer>(serviceProvider =>
 {
 string serviceName = serviceProvider.GetRequiredService<IHostingEnvironment>().ApplicationName;
 
 var loggerFactory = serviceProvider.GetRequiredService<ILoggerFactory>();
 var sampler = new ConstSampler(sample: true);
 var reporter = new RemoteReporter.Builder()
  .WithLoggerFactory(loggerFactory)
  .WithSender(new UdpSender("jagerservice", 6831, 0))
  .Build();

 var tracer = new Tracer.Builder(serviceName)
  .WithLoggerFactory(loggerFactory)
  .WithSampler(sampler)
  .WithReporter(reporter)
  .Build();

 GlobalTracer.Register(tracer);

 return tracer;
 });
}

public void ConfigureServices(IServiceCollection services)
{
 // Adds an InMemory-Sqlite DB to show EFCore traces.
 services
 .AddEntityFrameworkSqlite()
 .AddDbContext<BDbContext>(options =>
 {
  var connectionStringBuilder = new SqliteConnectionStringBuilder
  {
  DataSource = ":memory:",
  Mode = SqliteOpenMode.Memory,
  Cache = SqliteCacheMode.Shared
  };
  var connection = new SqliteConnection(connectionStringBuilder.ConnectionString);

  connection.Open();
  connection.EnableExtensions(true);

  options.UseSqlite(connection);
 });

 // Add EasyCaching Inmemory provider.
 services.AddEasyCaching(options =>
 {
 options.UseInMemory("m1");
 });
}

// GET api/values
[HttpGet]
public async Task<IActionResult> GetAsync()
{
 var provider = _providerFactory.GetCachingProvider("m1");

 var obj = await provider.GetAsync("mykey", async () => await _dbContext.DemoObjs.ToListAsync(), TimeSpan.FromSeconds(30));

 return Ok(obj);
}

// GET api/values
[HttpGet]
public async Task<string> GetAsync()
{
 var res = await GetDemoAsync();
 return res;
}
 
private async Task<string> GetDemoAsync()
{
 var client = _clientFactory.CreateClient();

 var request = new HttpRequestMessage
 {
 Method = HttpMethod.Get,
 RequestUri = new Uri($"http://bservice/api/values")
 };

 var response = await client.SendAsync(request);

 response.EnsureSuccessStatusCode();

 var body = await response.Content.ReadAsStringAsync();

 return body;
}

services.AddOpenTracing(new System.Collections.Generic.Dictionary<string,LogLevel>
{
 {"AService", LogLevel.Information}
});