Балдин Никита Лаб. 2 Группа 6511

Api.Gateway/Api.Gateway.csproj

@@ -0,0 +1,23 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Ocelot" Version="24.1.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\VehicleApp\VehicleApp.ServiceDefaults\VehicleApp.ServiceDefaults.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="ocelot.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
+</Project>

Api.Gateway/Program.cs

@@ -0,0 +1,47 @@
+using Api.Gateway;
+using Ocelot.DependencyInjection;
+using Ocelot.Middleware;
+using VehicleApp.ServiceDefaults;
+
+var builder = WebApplication.CreateBuilder(args);
+
+builder.AddServiceDefaults();
+builder.Services.AddServiceDiscovery();
+builder.Configuration.AddJsonFile("ocelot.json", optional: false, reloadOnChange: true);
+
+var overrides = new Dictionary<string, string?>();
+var discovered = new List<string>();
+for (var i = 0; Environment.GetEnvironmentVariable($"services__vehicleapp-api-{i}__https__0") is { } url; i++)
+{
+    var uri = new Uri(url);
+    overrides[$"Routes:0:DownstreamHostAndPorts:{i}:Host"] = uri.Host;
+    overrides[$"Routes:0:DownstreamHostAndPorts:{i}:Port"] = uri.Port.ToString();
+    discovered.Add($"{uri.Host}:{uri.Port}");
+}
+
+if (overrides.Count > 0)
+    builder.Configuration.AddInMemoryCollection(overrides);
+
+builder.Services.AddOcelot()
+    .AddCustomLoadBalancer((sp, _, provider) =>
+        new WeightedRoundRobinLoadBalancer(provider.GetAsync, sp.GetRequiredService<IConfiguration>()));
+
+var allowedOrigins = builder.Configuration
+    .GetSection("Cors:AllowedOrigins")
+    .Get<string[]>() ?? [];
+
+builder.Services.AddCors(options =>
+    options.AddDefaultPolicy(policy =>
+        policy.WithOrigins(allowedOrigins)
+              .WithMethods("GET")
+              .WithHeaders("Content-Type")));
+
+var app = builder.Build();
+
+app.MapDefaultEndpoints();
+
+app.UseCors();
+
+await app.UseOcelot();
+
+app.Run();

Api.Gateway/Properties/launchSettings.json

@@ -0,0 +1,38 @@
+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:3226",
+      "sslPort": 44349
+    }
+  },
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "http://localhost:5233",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "https://localhost:7215;http://localhost:5233",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

Api.Gateway/WeightedRoundRobinLoadBalancer.cs

@@ -0,0 +1,60 @@
+using Ocelot.LoadBalancer.Interfaces;
+using Ocelot.Responses;
+using Ocelot.Values;
+
+namespace Api.Gateway;
+
+/// <summary>
+/// Балансировщик нагрузки Weighted Round Robin (взвешенная карусель).
+/// Каждой реплике сервиса присваивается вес, в зависимости от которого она используется чаще/реже других.
+/// Реплики перебираются циклически: для весов [3, 2, 1] последовательность будет R1, R1, R1, R2, R2, R3, R1, R1, R1, ...
+/// </summary>
+/// <param name="services">Делегат получения актуального списка downstream-реплик от Ocelot.</param>
+/// <param name="configuration">
+/// Конфигурация приложения. Веса считываются из секции <c>LoadBalancer:Weights</c> как массив <see cref="int"/>
+/// в порядке реплик. Если для реплики вес отсутствует или некорректен (≤ 0), используется значение 1.
+/// </param>
+public class WeightedRoundRobinLoadBalancer(
+    Func<Task<List<Service>>> services,
+    IConfiguration configuration) : ILoadBalancer
+{
+    private readonly int[] _weights = configuration
+        .GetSection("LoadBalancer:Weights").Get<int[]>() ?? [];
+
+    private long _counter = -1;
+
+    public string Type => nameof(WeightedRoundRobinLoadBalancer);
+
+    public async Task<Response<ServiceHostAndPort>> LeaseAsync(HttpContext httpContext)
+    {
+        var list = await services();
+
+        if (list.Count == 0)
+            throw new InvalidOperationException("No available downstream services.");
+
+        var weights = NormalizeWeights(list.Count);
+        var total = weights.Sum();
+
+        var pick = (int)(Interlocked.Increment(ref _counter) % total);
+        if (pick < 0) pick += total;
+
+        for (var i = 0; i < list.Count; i++)
+        {
+            pick -= weights[i];
+            if (pick < 0)
+                return new OkResponse<ServiceHostAndPort>(list[i].HostAndPort);
+        }
+
+        return new OkResponse<ServiceHostAndPort>(list[^1].HostAndPort);
+    }
+
+    public void Release(ServiceHostAndPort hostAndPort) { }
+
+    private int[] NormalizeWeights(int count)
+    {
+        var result = new int[count];
+        for (var i = 0; i < count; i++)
+            result[i] = i < _weights.Length && _weights[i] > 0 ? _weights[i] : 1;
+        return result;
+    }
+}

Api.Gateway/appsettings.Development.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

Api.Gateway/appsettings.json

@@ -0,0 +1,18 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*",
+  "Cors": {
+    "AllowedOrigins": [
+      "http://localhost:5127",
+      "https://localhost:7282"
+    ]
+  },
+  "LoadBalancer": {
+    "Weights": [ 5, 4, 3, 2, 1 ]
+  }
+}

Api.Gateway/ocelot.json

@@ -0,0 +1,35 @@
+{
+  "Routes": [
+    {
+      "UpstreamPathTemplate": "/vehicle",
+      "UpstreamHttpMethod": [ "GET" ],
+      "DownstreamPathTemplate": "/api/vehicle",
+      "DownstreamScheme": "https",
+      "DownstreamHostAndPorts": [
+        {
+          "Host": "localhost",
+          "Port": 0
+        },
+        {
+          "Host": "localhost",
+          "Port": 0
+        },
+        {
+          "Host": "localhost",
+          "Port": 0
+        },
+        {
+          "Host": "localhost",
+          "Port": 0
+        },
+        {
+          "Host": "localhost",
+          "Port": 0
+        }
+      ],
+      "LoadBalancerOptions": {
+        "Type": "WeightedRoundRobinLoadBalancer"
+      }
+    }
+  ]
+}

Client.Wasm/Components/StudentCard.razor

@@ -4,10 +4,10 @@
     </CardHeader>
     <CardBody>
         <UnorderedList Unstyled>
-            <UnorderedListItem>Номер <Strong>№X "Название лабораторной"</Strong></UnorderedListItem>
-            <UnorderedListItem>Вариант <Strong>№Х "Название варианта"</Strong></UnorderedListItem>
-            <UnorderedListItem>Выполнена <Strong>Фамилией Именем 65ХХ</Strong> </UnorderedListItem>
-            <UnorderedListItem><Link To="https://puginarug.com/">Ссылка на форк</Link></UnorderedListItem>
+            <UnorderedListItem>Номер <Strong>№2 "Балансировка нагрузки"</Strong></UnorderedListItem>
+            <UnorderedListItem>Вариант <Strong>№1 "Транспортное средство"</Strong></UnorderedListItem>
+            <UnorderedListItem>Выполнил <Strong>Балдин Никита 6511</Strong> </UnorderedListItem>
+            <UnorderedListItem><Link To="https://github.com/Nikita-Baldin/cloud-development">Ссылка на форк</Link></UnorderedListItem>
         </UnorderedList>
     </CardBody>
 </Card>

Client.Wasm/Properties/launchSettings.json

@@ -12,7 +12,7 @@
     "http": {
       "commandName": "Project",
       "dotnetRunMessages": true,
-      "launchBrowser": true,
+      "launchBrowser": false,
       "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
       "applicationUrl": "http://localhost:5127",
       "environmentVariables": {
@@ -22,7 +22,7 @@
     "https": {
       "commandName": "Project",
       "dotnetRunMessages": true,
-      "launchBrowser": true,
+      "launchBrowser": false,
       "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
       "applicationUrl": "https://localhost:7282;http://localhost:5127",
       "environmentVariables": {
@@ -31,7 +31,7 @@
     },
     "IIS Express": {
       "commandName": "IISExpress",
-      "launchBrowser": true,
+      "launchBrowser": false,
       "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
       "environmentVariables": {
         "ASPNETCORE_ENVIRONMENT": "Development"

Client.Wasm/wwwroot/appsettings.json

@@ -6,5 +6,5 @@
     }
   },
   "AllowedHosts": "*",
-  "BaseAddress": ""
+  "BaseAddress": "https://localhost:7215/vehicle"
 }

CloudDevelopment.sln

@@ -5,6 +5,14 @@ VisualStudioVersion = 17.14.36811.4
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Client.Wasm", "Client.Wasm\Client.Wasm.csproj", "{AE7EEA74-2FE0-136F-D797-854FD87E022A}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VehicleApp.AppHost", "VehicleApp\VehicleApp.AppHost\VehicleApp.AppHost.csproj", "{EF467773-3428-4934-B614-77783EAE4FA3}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VehicleApp.ServiceDefaults", "VehicleApp\VehicleApp.ServiceDefaults\VehicleApp.ServiceDefaults.csproj", "{97B1F7F0-C53D-2D4D-3803-B1150F873870}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VehicleApp.Api", "VehicleApp.Api\VehicleApp.Api.csproj", "{54C02CF3-616B-EC3E-6F35-EAF0ED92B6B0}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Api.Gateway", "Api.Gateway\Api.Gateway.csproj", "{C99E72F4-9BA7-7D56-C88E-FB28534EFCB6}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,6 +23,22 @@ Global
 		{AE7EEA74-2FE0-136F-D797-854FD87E022A}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{AE7EEA74-2FE0-136F-D797-854FD87E022A}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{AE7EEA74-2FE0-136F-D797-854FD87E022A}.Release|Any CPU.Build.0 = Release|Any CPU
+		{EF467773-3428-4934-B614-77783EAE4FA3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EF467773-3428-4934-B614-77783EAE4FA3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EF467773-3428-4934-B614-77783EAE4FA3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EF467773-3428-4934-B614-77783EAE4FA3}.Release|Any CPU.Build.0 = Release|Any CPU
+		{97B1F7F0-C53D-2D4D-3803-B1150F873870}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{97B1F7F0-C53D-2D4D-3803-B1150F873870}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{97B1F7F0-C53D-2D4D-3803-B1150F873870}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{97B1F7F0-C53D-2D4D-3803-B1150F873870}.Release|Any CPU.Build.0 = Release|Any CPU
+		{54C02CF3-616B-EC3E-6F35-EAF0ED92B6B0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{54C02CF3-616B-EC3E-6F35-EAF0ED92B6B0}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{54C02CF3-616B-EC3E-6F35-EAF0ED92B6B0}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{54C02CF3-616B-EC3E-6F35-EAF0ED92B6B0}.Release|Any CPU.Build.0 = Release|Any CPU
+		{C99E72F4-9BA7-7D56-C88E-FB28534EFCB6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C99E72F4-9BA7-7D56-C88E-FB28534EFCB6}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C99E72F4-9BA7-7D56-C88E-FB28534EFCB6}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C99E72F4-9BA7-7D56-C88E-FB28534EFCB6}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE