（五）MMA（OpenTelemetry/Rabbit MQ/）

项目地址

• 教程作者：
• 教程地址：

• 代码仓库地址：

• 所用到的框架和插件：

dbt 
airflow

一、OpenTelemetry

1.1 配置OpenTelemetry

1. 服务添加

1. namespace Evently.Common.Infrastructure; 配置

        services
            .AddOpenTelemetry()
            .ConfigureResource(resource => resource.AddService(serviceName))
            .WithTracing(tracing =>
            {
                tracing
                    .AddAspNetCoreInstrumentation()
                    .AddHttpClientInstrumentation()
                    .AddEntityFrameworkCoreInstrumentation()
                    .AddRedisInstrumentation()
                    .AddNpgsql()
                    .AddSource(MassTransit.Logging.DiagnosticHeaders.DefaultListenerName);

                tracing.AddOtlpExporter();
            });

2. 添加服务标识

1. 创建服务标识

namespace Evently.Api.OpenTelemetry;

public static class DiagnosticsConfig
{
    public const string ServiceName = "Evently.Api";
}

2. program里注册
   

3. 添加请求的标识

• 在RequestLoggingPipelineBehavior添加的请求和服务的标识

4. 添加中间价

• LogContextTraceLoggingMiddleware

namespace Evently.Api.Middleware;
internal sealed class LogContextTraceLoggingMiddleware(RequestDelegate next)
{
    public Task Invoke(HttpContext context)
    {
        string traceId = Activity.Current?.TraceId.ToString();
        using (LogContext.PushProperty("TraceId", traceId))
        {
            return next.Invoke(context);
        }
    }
}

• MiddlewareExtensions 用于将自定义日志追踪中间件 LogContextTraceLoggingMiddleware 添加到 ASP.NET Core 的中间件管道中。

namespace Evently.Api.Middleware;
internal static class MiddlewareExtensions
{
    internal static IApplicationBuilder UseLogContextTraceLogging(this IApplicationBuilder app)
    {
        app.UseMiddleware<LogContextTraceLoggingMiddleware>();
        return app;
    }
}

• 中间件添加
  

二、Rabbit MQ

2.1 配置Rabbit MQ

1. docker-compose

• docker-compose.yml

  evently.queue:
    image: rabbitmq:management-alpine
    container_name: Evently.Queue
    hostname: evently-queue
    volumes:
        - ./.containers/queue/data/:/var/lib/rabbitmq
        - ./.containers/queue/log/:/var/log/rabbitmq
    environment:
        RABBITMQ_DEFAULT_USER: guest
        RABBITMQ_DEFAULT_PASS: guest
    ports:
      - 5672:5672
      - 15672:15672

2. 添加Rabbit MQ的Connect String

  "ConnectionStrings": {
    "Database": "Host=evently.database;Port=5432;Database=evently;Username=postgres;Password=postgres;Include Error Detail=true",
    "Cache": "evently.redis:6379",
    "Queue": "amqp://evently-queue:5672"
  },

2.2 替换成Rabbit MQ

1. 安装所需要的包

• 替换之前内存为Rabbit MQ
• 安装所需要的包

    <PackageReference Include="AspNetCore.HealthChecks.Rabbitmq" Version="8.0.1" />
    <PackageReference Include="MassTransit.RabbitMQ" Version="8.2.1" />

1. 创建MQ配置文件

namespace Evently.Common.Infrastructure.EventBus;
public sealed record RabbitMqSettings(string Host, string Username = "guest", string Password = "guest");

2. 使用

1. 修改MassTransit，将内存改为MQ
   
2. 注册Ticketing的消费者
   
3. 注册Event的消费者
   
4. Program里注册
   

三、API Gateways

3.1 创建Gateway

1. 配置docker-compose

2. 添加各种服务

• 在Gateway的program.cs里添加服务

WebApplicationBuilder builder = WebApplication.CreateBuilder(args);
builder.Host.UseSerilog((context, loggerConfig) => loggerConfig.ReadFrom.Configuration(context.Configuration));
builder.Services.AddReverseProxy()
    .LoadFromConfig(builder.Configuration.GetSection("ReverseProxy"));
    
builder.Services
    .AddOpenTelemetry()
    .ConfigureResource(resource => resource.AddService(DiagnosticsConfig.ServiceName))
    .WithTracing(tracing =>
    {
        tracing
            .AddAspNetCoreInstrumentation()
            .AddHttpClientInstrumentation()
            .AddSource("Yarp.ReverseProxy");

        tracing.AddOtlpExporter();
    });

builder.Services.AddAuthorization();
builder.Services.AddAuthentication().AddJwtBearer();
builder.Services.ConfigureOptions<JwtBearerConfigureOptions>();
WebApplication app = builder.Build();
app.UseLogContextTraceLogging();
app.UseSerilogRequestLogging();
app.UseAuthentication();
app.UseAuthorization();
app.MapReverseProxy();
app.Run();

3. 添加jwt配置

namespace Evently.Gateway.Authentication;
internal sealed class JwtBearerConfigureOptions(IConfiguration configuration)
    : IConfigureNamedOptions<JwtBearerOptions>
{
    private const string ConfigurationSectionName = "Authentication";

    public void Configure(JwtBearerOptions options)
    {
        configuration.GetSection(ConfigurationSectionName).Bind(options);
    }
    public void Configure(string? name, JwtBearerOptions options)
    {
        Configure(options);
    }
}

4. 添加日志追踪

1. 添加日志追踪

using System.Diagnostics;
using Serilog.Context;
namespace Evently.Gateway.Middleware;
internal sealed class LogContextTraceLoggingMiddleware(RequestDelegate next)
{
    public Task Invoke(HttpContext context)
    {
        string traceId = Activity.Current?.TraceId.ToString();

        using (LogContext.PushProperty("TraceId", traceId))
        {
            return next.Invoke(context);
        }
    }
}

2. 注册

namespace Evently.Gateway.Middleware;
internal static class MiddlewareExtensions
{
    internal static IApplicationBuilder UseLogContextTraceLogging(this IApplicationBuilder app)
    {
        app.UseMiddleware<LogContextTraceLoggingMiddleware>();
        return app;
    }
}

5. 配置appsettings

• 基础设置

{
  "Authentication": {
    "Audience": "account",
    "TokenValidationParameters": {
      "ValidIssuers": [ "http://evently.identity:8080/realms/evently", "http://localhost:18080/realms/evently" ]
    },
    "MetadataAddress": "http://evently.identity:8080/realms/evently/.well-known/openid-configuration",
    "RequireHttpsMetadata": false
  },
  "Serilog": {
    "Using": [
      "Serilog.Sinks.Console",
      "Serilog.Sinks.Seq"
    ],
    "MinimumLevel": {
      "Default": "Information",
      "Override": {
        "Microsoft": "Information"
      }
    },
    "WriteTo": [
      { "Name": "Console" },
      {
        "Name": "Seq",
        "Args": { "serverUrl": "http://evently.seq:5341" }
      }
    ],
    "Enrich": [ "FromLogContext", "WithMachineName", "WithThreadId" ],
    "Properties": {
      "Application": "Evently.Gateway"
    }
  },
  "OTEL_EXPORTER_OTLP_ENDPOINT": "http://evently.jaeger:4317",
}

6. Yarp反向代理设置