1.新增閘道器服務本身 swagger配置

services.AddSwaggerGen(options =>

            {

                options.SwaggerDoc("ApiGateway", new OpenApiInfo { Title = "閘道器服務", Version = "v1" });

            });

2.安裝ocelot包 3.新增ocelot配置

services.AddOcelot().AddConsul();

4.配置閘道器整合swagger選項

 var apis = new List<string> { "service1
 
", "service2" };

            app

               .UseSwagger()

               .UseSwaggerUI(options =>

               {

                   apis.ForEach(m =>

                   {

                       options.SwaggerEndpoint($"/{m}/swagger.json", m);

                   });

               });

            
 
//loggerFactory.a(Configuration.GetSection("Logging"));

            app.UseOcelot().Wait();

5.新增ocelot 閘道器配置檔案

{

  "ReRoutes": [

    {

      "DownstreamPathTemplate": "/service1/swagger.json",

      "DownstreamScheme": "http",

      "ServiceName": "Service1",

      "LoadBalancerOptions": {

        
 
"Type": "RoundRobin"

      },

      "UseServiceDiscovery": true,

      "UpstreamPathTemplate": "/service1/swagger.json",

      "UpstreamScheme": "http",

      "UpstreamHttpMethod": [ "GET", "POST", "DELETE", "PUT" ]

    },

    {

      "DownstreamPathTemplate": "/service2/swagger.json",

      "DownstreamScheme": "http",

      "LoadBalancer": "RoundRobin",

      "ServiceName": "Service2",

      "UseServiceDiscovery": true,

      "UpstreamPathTemplate": "/service2/swagger.json",

      "UpstreamScheme": "http",

      "UpstreamHttpMethod": [ "GET", "POST", "DELETE", "PUT" ]

    },

    {

      "DownstreamPathTemplate": "/service1/api/{url}",

      "DownstreamScheme": "http",

      "LoadBalancerOptions": {

        "Type": "RoundRobin"

      },

      "ServiceName": "Service1",

      "UseServiceDiscovery": true,

      "UpstreamPathTemplate": "/service1/api/{url}",

      "UpstreamHttpMethod": [ "GET", "POST", "DELETE", "PUT" ]

    },

    {

      "DownstreamPathTemplate": "/service2/api/{url}",

      "DownstreamScheme": "http",

      "LoadBalancer": "RoundRobin",

      "ServiceName": "Service2",

      "UseServiceDiscovery": true,

      "UpstreamPathTemplate": "/service2/api/{url}",

      "UpstreamHttpMethod": [ "GET", "POST", "DELETE", "PUT" ]

    }



  ],

  "GlobalConfiguration": {

    "BaseUrl": null,

    "ServiceDiscoveryProvider": {

      "Host": "localhost",

      "Port": 8500,

      "Type": "Consul"

    }

  }

}

6.載入閘道器ocelot配置檔案

Program中：
        public static IHostBuilder CreateHostBuilder(string[] args) =>

            Host.CreateDefaultBuilder(args)

                .ConfigureWebHostDefaults(webBuilder =>

                {

                    webBuilder.UseStartup<Startup>();



                    webBuilder.UseUrls("http://localhost:9000");

                })

            .ConfigureAppConfiguration((hostingContext, builder) =>

            {

                builder

                .SetBasePath(hostingContext.HostingEnvironment.ContentRootPath)

                .AddJsonFile("ocelot.json");

            });

7.配置ocelot配置檔案，啟用服務發現，以及請求路由匹配規則，詳見json檔案 8.踩坑點記錄 （1）控制檯報錯：無法匹配上游路徑，檢查配置檔案無問題 解決:Program中手動指定載入ocelot配置配置，見第6步 （2）ocelot 版本為16.0以上時，配置檔案標籤為Routes， 16.0以下時為ReRoutes,測試使用16.0版本 控制檯報錯 無法從程式集載入型別XXX,猜測載入的是16.0之前的配置型別，最後降級至15.0 控制檯不報此錯誤 （3）不啟用服務發現必須指定下游地址，啟用服務發現必須新增服務名 以及服務發現配置。 (4) 服務路由需加服務別名，用於閘道器匹配 請求哪個服務 (5) 負載均衡配置失效 :"LoadBalancer": "RoundRobin",指定本地下游地址也有同樣問題，一樣的解決方式 　　解決:使用另一種配置寫法: "LoadBalancerOptions": { 　　"Type": "RoundRobin" 　　},