编写k8s测试例子

samples/OelotKube/ApiGateway/Program.cs

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+using Microsoft.AspNetCore;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.Configuration;
+using Ocelot.DependencyInjection;
+using Ocelot.Middleware;
+using Ocelot.Provider.Kubernetes;
+
+namespace ApiGateway
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            BuildWebHost(args).Run();
+        }
+
+        public static IWebHost BuildWebHost(string[] args) =>
+            WebHost.CreateDefaultBuilder(args)
+                .UseUrls("http://localhost:5000")
+                .ConfigureAppConfiguration((hostingContext, config) =>
+                {
+                    config
+                        .SetBasePath(hostingContext.HostingEnvironment.ContentRootPath)
+                        .AddJsonFile("appsettings.json", true, true)
+                        .AddJsonFile($"appsettings.{hostingContext.HostingEnvironment.EnvironmentName}.json", true, true)
+                        .AddJsonFile("ocelot.json", false, false)
+                        .AddEnvironmentVariables();
+                })
+            .UseStartup<Startup>()
+            .Build();
+    }
+}
+