feat(gateway): integrate Kubernetes service discovery in YarpGateway

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

Program.cs

@@ -10,6 +10,8 @@ using YarpGateway.LoadBalancing;
 using YarpGateway.Middleware;
 using YarpGateway.Services;
 using StackExchange.Redis;
+using Fengling.ServiceDiscovery.Extensions;
+using Fengling.ServiceDiscovery.Kubernetes.Extensions;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -64,6 +66,15 @@ builder.Services.AddSingleton<IProxyConfigProvider>(sp => sp.GetRequiredService<
 
 builder.Services.AddHostedService<PgSqlConfigChangeListener>();
 
+// 添加 Kubernetes 服务发现
+builder.Services.AddKubernetesServiceDiscovery(options =>
+{
+    options.LabelSelector = "app.kubernetes.io/managed-by=yarp";
+    options.UseInClusterConfig = false; // 本地调试设为 false，生产环境设为 true
+});
+
+builder.Services.AddServiceDiscovery();
+
 var corsSettings = builder.Configuration.GetSection("Cors");
 builder.Services.AddCors(options =>
 {

YarpGateway.csproj

@@ -25,3 +25,5 @@
     <ProjectReference Include="..\Fengling.ServiceDiscovery\Fengling.ServiceDiscovery.Kubernetes\Fengling.ServiceDiscovery.Kubernetes.csproj" />
     <ProjectReference Include="..\Fengling.ServiceDiscovery\Fengling.ServiceDiscovery.Static\Fengling.ServiceDiscovery.Static.csproj" />
   </ItemGroup>
+
+</Project>