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本文只講步驟不講原理，先搭建成功再自行找資料看具體配置是什么意思！

環境：win10，vs2022 ， .net6 ，neget包(Ocelot和Ocelot.Provider.Consul皆為18.0.0版本，Consul1.6.10.8版本)，consul_1.14.2_windows_386

配置ocelot + consul花了一天時間，主要問題在于ocelot訪問的坑，consul注冊的時候，Node Name為計算機名稱，consul訪問直接的計算機名稱，而并非127.0.0.1或者localhost，導致報錯，提示目標計算機積極拒絕。同時注意你的訪問協議是https還是http，本文用的全是http

只需要將consul的Node Name改為127.0.0.1即可

還需要注意項目啟動和注冊的地址是否一致，如項目啟動用的是：localhost，注冊時使用的ip是：127.0.0.1，也會出現上述目標計算機積極拒絕的錯誤。

問題解決方案：

注意consul所在文件夾地址

第一種:在啟動consul的時候,node參數可以寫成 -node=127.0.0.1
如:consul agent -server -ui -bootstrap-expect=1 -data-dir=D:\Tools\consul_1.14.2_windows_386 -node=127.0.0.1 -client=0.0.0.0 -bind=127.0.0.1 -datacenter=dc1 -join 127.0.0.1

第二種:在啟動consul的時候,node參數可寫成"hostname",在Hosts文件中對,node參數添加dns解析.
consul agent -server -ui -bootstrap-expect=1 -data-dir=D:\Tools\consul_1.14.2_windows_386 -node=hostname -client=0.0.0.0 -bind=127.0.0.1 -datacenter=dc1 -join 127.0.0.1
win7 hosts文件位置:C:\Windows\System32\drivers\etc

在hosts文件中添加一行"127.0.0.1 hostname",即可

http://www.rzrgm.cn/huyougurenxinshangguo/p/15246313.html

https://blog.csdn.net/salty_oy/article/details/119636278

下面說一下實現

S1,S2引用了consul包，APIGateway引用了Ocelot包，Ocelot.Provider.Consul包

創建3個webapi，其中S1,S2為相同代碼，只修改了配置文件appsettings.json，一個端口為7000，一個端口為7001

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "Consul": {
    "IP": "127.0.0.1",
    "Port": "8500"

  },
  "Service": {
    "Name": "consul_test"
  },
  "ip": "127.0.0.1",
  "port": "7000",
  "AllowedHosts": "*"
}

　　launchSettings.json也把端口改一下，一個7000，一個7001，同時注意一下sslport這個key

{
  "$schema": "https://json.schemastore.org/launchsettings.json",
  "iisSettings": {
    "windowsAuthentication": false,
    "anonymousAuthentication": true,
    "iisExpress": {
      "applicationUrl": "http://127.0.0.1:7000",
      "sslPort": 0
    }
  },
  "profiles": {
    "S2": {
      "commandName": "Project",
      "dotnetRunMessages": true,
      "launchBrowser": true,
      "launchUrl": "swagger",
      "applicationUrl": "http://127.0.0.1:7000",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "launchUrl": "swagger",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    }
  }
}

webapi頁面WeatherForecastController

using Microsoft.AspNetCore.Mvc;

namespace S1.Controllers
{
    [ApiController]
    [Route("api/[controller]/[action]")]
    public class WeatherForecastController : ControllerBase
    {
        private static readonly string[] Summaries = new[]
        {
        "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
    };
        private readonly IConfiguration _IConfiguration;

        private readonly ILogger<WeatherForecastController> _logger;

        public WeatherForecastController(ILogger<WeatherForecastController> logger, IConfiguration iConfiguration)
        {
            _logger = logger;
            _IConfiguration = iConfiguration;
        }

        [HttpGet]
        public string GetTest()
        {
            string ip = _IConfiguration["IP"];
            string port = _IConfiguration["Port"];
            return $@"{ip} {port}";
        }

        //[HttpGet(Name = "GetWeatherForecast")]
        //public IEnumerable<WeatherForecast> Get()
        //{
        //    return Enumerable.Range(1, 5).Select(index => new WeatherForecast
        //    {
        //        Date = DateTime.Now.AddDays(index),
        //        TemperatureC = Random.Shared.Next(-20, 55),
        //        Summary = Summaries[Random.Shared.Next(Summaries.Length)]
        //    })
        //    .ToArray();
        //}
    }
}

然后在S1,S2兩個api中注入consulhelper類

using Consul;

namespace S2
{
    public static class ConsulHelper
    {
        /// <summary>
        /// 將當前站點注入到Consul
        /// </summary>
        /// <param name="configuration"></param>
        public static void ConsulRegister(this IConfiguration configuration)
        {
            //初始化Consul服務
            ConsulClient client = new ConsulClient(c => {
                c.Address = new Uri("http://127.0.0.1:8500");
                c.Datacenter = "dc1";
            });

            //站點做集群時ip和端口都會不一樣，所以我們通過環境變量來確定當前站點的ip與端口
            string ip = configuration["ip"];
            int port = int.Parse(configuration["port"]);
            client.Agent.ServiceRegister(new AgentServiceRegistration
            {
                ID = "service" + Guid.NewGuid(), //注冊進Consul后給個唯一id,
                Name = "consul_test", //站點做集群時，Name作為該集群的群名，
                //Address = ip,
                Address = "127.0.0.1",
                Port = port,
                Tags = null, //這個就是一個隨意的參數，文章后面做負載均衡的時候說
                Check = new AgentServiceCheck
                {
                    Interval = TimeSpan.FromSeconds(10),
                    //HTTP = $"http://{ip}:{port}/api/health",
                    HTTP = $"http://{ip}:{port}/api/WeatherForecast/GetTest",
                    Timeout = TimeSpan.FromSeconds(5),
                    DeregisterCriticalServiceAfter = TimeSpan.FromSeconds(5)
                }
            });
        }
    }
}

Program類中注入

using S2;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.

builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();
app.Configuration.ConsulRegister();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseAuthorization();

app.MapControllers();

app.Run();

S1,S2代碼完全一樣，區別只修改了launchSettings.json，appsettings.json配置文件的端口號

再說一下ocelot吧，

Program類注入Ocelot

using Ocelot.DependencyInjection;
using Ocelot.Middleware;
using Ocelot.Provider.Consul;
using Ocelot.Values;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.

builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddOcelot(new ConfigurationBuilder()
              .AddJsonFile("Ocelot.json")
              .Build()).AddConsul();
builder.Host.ConfigureLogging(c =>
{
    c.ClearProviders();
    c.AddConsole();
});
//builder.Host.ConfigureAppConfiguration((context, config) =>
//{
//    config.AddJsonFile("ocelot.json", optional: false, reloadOnChange: true);
//}).ConfigureWebHostDefaults(c => c.UseUrls("http://localhost:5000"));
//builder.Services.AddSwaggerGen();

var app = builder.Build();
app.UseOcelot();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    //app.UseSwagger();
    //app.UseSwaggerUI();
}

app.UseAuthorization();

app.MapControllers();

app.Run();

Ocelot.json

{
    "Routes": [
      {
        "DownstreamPathTemplate": "/api/{url}", //下游服務地址--url變量
        "DownstreamScheme": "http",
        "DownstreamHostAndPorts": [
          {
            "Host": "127.0.0.1",
            "Port": 7000
          }
          ,
          {
            "Host": "127.0.0.1",
            "Port": 7001
          }
        ],
        "UpstreamPathTemplate": "/{url}", //上游請求路徑，網關地址--url變量
        "UpstreamHttpMethod": [ "Get", "Post" ],
        //consul
        "UseServiceDiscovery": true, //使用服務發現
        "ServiceName": "consul_test", //consul服務名稱

"LoadBalancerOptions": { "Type": "RoundRobin" //輪詢 LeastConnection-最少連接數的服務器 NoLoadBalance不負載均衡  }, "GlobalConfiguration": { "RequestIdKey": "OcRequestId", "BaseUrl": "http://127.0.0.1:5000", //網關對外地址 //配置consul地址 "ServiceDiscoveryProvider": { "Host": "127.0.0.1", "Port": 8500, "Type": "Consul" //由consul提供服務發現，ocelot也支持etc等  } } } ] }

launchSettings.json

{
  "$schema": "https://json.schemastore.org/launchsettings.json",
  "iisSettings": {
    "windowsAuthentication": false,
    "anonymousAuthentication": true,
    "iisExpress": {
      "applicationUrl": "http://127.0.0.1:5001",
      "sslPort": 0
    }
  },
  "profiles": {
    "ApiGateway": {
      "commandName": "Project",
      "dotnetRunMessages": true,
      "launchBrowser": true,
      "applicationUrl": "http://127.0.0.1:5000",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "launchUrl": "swagger",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    }
  }
}

完成之后，先啟動S1,S2，看看consul注入成功沒有，

然后啟動ApiGateway，使用其對外地址進行訪問，http://127.0.0.1:5000，注意看地址，這里和Ocelot.json里面的配置有關

"DownstreamPathTemplate": "/api/{url}", //下游服務地址--url變量

"UpstreamPathTemplate": "/{url}", //上游請求路徑，網關地址--url變量

沒配置成功請仔細看加粗加紅部分

源碼：https://gitee.com/yuanrang123/ocelot-consul

posted on 2022-12-15 16:52 gongzi 閱讀(1009) 評論(0) 收藏舉報

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