public static IWebHostBuilder ConfigureTracing(this IWebHostBuilder webHostBuilder, IConfiguration configuration)
{
webHostBuilder.ConfigureServices(services =>
{
var tracingConfig = new TracingConfiguration();
configuration.GetSection("Tracing").Bind(tracingConfig);
if (!tracingConfig.EnableOpenTracing)
{
return;
}
services.AddOpenTracing();
var isJaeger = tracingConfig.Tracer.ToLower() == "jaeger";
var useAgent = tracingConfig.Tracer.ToLower().Contains("agent");
if (isJaeger || useAgent)
{
services.AddJaeger(configuration, useAgent);
}
else
{
services.AddDataDog(configuration);
}
});
return(webHostBuilder);
}
public static IServiceCollection AddDataDog(this IServiceCollection services, IConfiguration configuration)
{
if (services == null)
{
throw new ArgumentNullException(nameof(services));
}
services.AddSingleton <ITracer>(serviceProvider =>
{
var tracingConfig = new TracingConfiguration();
configuration.GetSection("Tracing").Bind(tracingConfig);
var datadogUrl = $"http://{tracingConfig.DataDogUrl}:8126";
var serviceName = Assembly.GetEntryAssembly().GetName().Name;
var tracer = Datadog.Trace.OpenTracing.OpenTracingTracerFactory.CreateTracer(new Uri(datadogUrl), serviceName);
GlobalTracer.Register(tracer);
return(tracer);
});
// Prevent endless loops when OpenTracing is tracking HTTP requests to opentracing.
services.Configure <HttpHandlerDiagnosticOptions>(options =>
{
options.IgnorePatterns.Add(request => request.RequestUri.ToString().ToLower().Contains("/api/traces"));
options.IgnorePatterns.Add(request => request.RequestUri.ToString().ToLower().EndsWith("hc"));
options.IgnorePatterns.Add(request => request.RequestUri.ToString().ToLower().Contains("datadoghq"));
});
return(services);
}
public static IWebHostBuilder ConfigureTracing(this IWebHostBuilder webHostBuilder, IConfiguration configuration)
{
webHostBuilder.ConfigureServices(services =>
{
var tracingConfig = new TracingConfiguration();
configuration.GetSection("Tracing").Bind(tracingConfig);
if (tracingConfig.EnableOpenTracing)
{
services.AddJaeger();
services.AddOpenTracing();
}
});
return(webHostBuilder);
}
public static IServiceCollection AddJaeger(this IServiceCollection services, IConfiguration configuration, bool useAgent = true)
{
if (services == null)
{
throw new ArgumentNullException(nameof(services));
}
services.AddSingleton <ITracer>(serviceProvider =>
{
var tracingConfig = new TracingConfiguration();
configuration.GetSection("Tracing").Bind(tracingConfig);
string serviceName = tracingConfig.ServiceName ?? Assembly.GetEntryAssembly().GetName().Name;
ILoggerFactory loggerFactory = serviceProvider.GetRequiredService <ILoggerFactory>();
ITracer tracer;
//HACK TIME
var useLocalSettigns = tracingConfig.JaegerUrl?.Contains("localhost");
if (!useAgent && useLocalSettigns)
{
//use lcoalhost defaults.
ISampler sampler = new ConstSampler(sample: true);
tracer = new Tracer.Builder(serviceName)
.WithLoggerFactory(loggerFactory)
.WithSampler(sampler)
.Build();
GlobalTracer.Register(tracer);
return(tracer);
}
//ok we will try and connect to an external jaeger setup
if (useAgent)
{
//use the agent
Environment.SetEnvironmentVariable("JAEGER_AGENT_HOST", tracingConfig.JaegerAgent);
Environment.SetEnvironmentVariable("JAEGER_AGENT_PORT", "6831");
}
else
{
//use the collector
var jaegerUri = $"http://{tracingConfig.JaegerUrl}:14268/api/traces";
Environment.SetEnvironmentVariable("JAEGER_ENDPOINT", jaegerUri);
}
Environment.SetEnvironmentVariable("JAEGER_SERVICE_NAME", serviceName);
Environment.SetEnvironmentVariable("JAEGER_SAMPLER_TYPE", "const");
var config = Jaeger.Configuration.FromEnv(loggerFactory);
tracer = config.GetTracer();
GlobalTracer.Register(tracer);
return(tracer);
});
// Prevent endless loops when OpenTracing is tracking HTTP requests to Jaeger.
services.Configure <HttpHandlerDiagnosticOptions>(options =>
{
options.IgnorePatterns.Add(request => request.RequestUri.ToString().ToLower().Contains("/api/traces"));
options.IgnorePatterns.Add(request => request.RequestUri.ToString().ToLower().EndsWith("hc"));
options.IgnorePatterns.Add(request => request.RequestUri.ToString().ToLower().Contains("datadoghq"));
});
return(services);
}
