Consul+Ocelot+.Net Core Api+IdentityServer4（二）

Ocelot配置

建立项目
添加配置

建立项目

新建Asp.net core Web 空项目，命名 OcelotService
添加Nuget包 - Ocelot.Provider.Consul
菜单：工具 / Nuget包管理器 / 管理解决方案的 Nuget 程序包

如图所示，在浏览标签中输入Ocelot.Provider.Consul，检索出对应的包后，点击安装

添加配置

新建一个 CoelotConfig.json 文件

{
  "ReRoutes": [
    {
      "DownstreamPathTemplate": "/api/{url}",//下游地址模板，转发模板
      "DownstreamScheme": "http",//下游转发协议
      "UpstreamPathTemplate": "/ApiA/{url}",//上游匹配模板
      "UpstreamHttpMethod": [ "Get", "Post" ],//上游匹配协议
      "UseServiceDiscovery": true,//是否进行服务发现
      "ServiceName": "ApiA", //服务名称
      "LoadBalancerOptions": { 
        "Type": "RoundRobin" //负载均衡，转徇
      }
    },
    {
      "DownstreamPathTemplate": "/api/{url}",
      "DownstreamScheme": "http",
      "UpstreamPathTemplate": "/ApiB/{url}",
      "UpstreamHttpMethod": [ "Get", "Post" ],
      "UseServiceDiscovery": true,
      "ServiceName": "ApiB",
      "LoadBalancerOptions": {
        "Type": "RoundRobin"
      }
    }
  ],
  "GlobalConfiguration": {//服务发现配置
    "ServiceDiscoveryProvider": {
      "Host": "localhost",
      "Port": 8500,
      "Type": "Consul"
    }
  }
}

载入配置文件

修改 Program.cs 文件

namespace OcelotService
{
    public class Program
    {
        public static void Main(string[] args)
        {
            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureAppConfiguration(config=>config.AddJsonFile("OcelotConfig.json", true, true))
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                });
    }
}

注意：如果 AddJsonFile 方法不存在，引入 Microsoft.Extensions.Configuration.Json
Nuget包

启动 Ocelot 服务

修改 Startup.cs 文件

public class Startup
{
    // This method gets called by the runtime. Use this method to add services to the container.
    // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddOcelot().AddConsul();
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        app.UseRouting();

        app.UseOcelot().Wait();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapGet("/", async context =>
            {
                await context.Response.WriteAsync("Hello World!");
            });
        });
    }
}