Елагин Денис 6513 Лаб. 2 #24
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@@ -6,5 +6,5 @@ | |
| } | ||
| }, | ||
| "AllowedHosts": "*", | ||
| "BaseAddress": "http://localhost:5300/residential-building" | ||
| } | ||
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| @@ -0,0 +1,26 @@ | ||
| var builder = DistributedApplication.CreateBuilder(args); | ||
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| var cache = builder.AddRedis("residential-building-cache") | ||
| .WithRedisInsight(containerName: "residential-building-insight"); | ||
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| var gateway = builder.AddProject<Projects.ResidentialBuilding_Gateway>("gateway") | ||
| .WithEndpoint("http", endpoint => endpoint.Port = 5300) | ||
| .WithExternalHttpEndpoints(); | ||
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| const int generatorPortBase = 5200; | ||
| for (var i = 1; i <= 5; ++i) | ||
| { | ||
| var i1 = i; | ||
| var generator = builder.AddProject<Projects.ResidentialBuilding_Generator>($"generator-{i}") | ||
| .WithReference(cache, "residential-building-cache") | ||
| .WithEndpoint("http", endpoint => endpoint.Port = generatorPortBase + i1) | ||
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| .WaitFor(cache); | ||
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| gateway.WaitFor(generator); | ||
| } | ||
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| builder.AddProject<Projects.Client_Wasm>("client") | ||
| .WithReference(gateway) | ||
| .WaitFor(gateway); | ||
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| builder.Build().Run(); | ||
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| @@ -0,0 +1,29 @@ | ||
| { | ||
| "$schema": "https://json.schemastore.org/launchsettings.json", | ||
| "profiles": { | ||
| "https": { | ||
| "commandName": "Project", | ||
| "dotnetRunMessages": true, | ||
| "launchBrowser": true, | ||
| "applicationUrl": "https://localhost:17129;http://localhost:15221", | ||
| "environmentVariables": { | ||
| "ASPNETCORE_ENVIRONMENT": "Development", | ||
| "DOTNET_ENVIRONMENT": "Development", | ||
| "ASPIRE_DASHBOARD_OTLP_ENDPOINT_URL": "https://localhost:21101", | ||
| "ASPIRE_RESOURCE_SERVICE_ENDPOINT_URL": "https://localhost:22255" | ||
| } | ||
| }, | ||
| "http": { | ||
| "commandName": "Project", | ||
| "dotnetRunMessages": true, | ||
| "launchBrowser": true, | ||
| "applicationUrl": "http://localhost:15221", | ||
| "environmentVariables": { | ||
| "ASPNETCORE_ENVIRONMENT": "Development", | ||
| "DOTNET_ENVIRONMENT": "Development", | ||
| "ASPIRE_DASHBOARD_OTLP_ENDPOINT_URL": "http://localhost:19083", | ||
| "ASPIRE_RESOURCE_SERVICE_ENDPOINT_URL": "http://localhost:20274" | ||
| } | ||
| } | ||
| } | ||
| } |
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| @@ -0,0 +1,24 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
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| <Sdk Name="Aspire.AppHost.Sdk" Version="9.5.0" /> | ||
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| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| <TargetFramework>net8.0</TargetFramework> | ||
| <ImplicitUsings>enable</ImplicitUsings> | ||
| <Nullable>enable</Nullable> | ||
| <UserSecretsId>ed7e1e47-dc98-4419-8424-85412466aa9b</UserSecretsId> | ||
| </PropertyGroup> | ||
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| <ItemGroup> | ||
| <PackageReference Include="Aspire.Hosting.AppHost" Version="9.5.0" /> | ||
| <PackageReference Include="Aspire.Hosting.Redis" Version="9.5.0" /> | ||
| </ItemGroup> | ||
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| <ItemGroup> | ||
| <ProjectReference Include="..\ResidentialBuilding.Generator\ResidentialBuilding.Generator.csproj" /> | ||
| <ProjectReference Include="..\Client.Wasm\Client.Wasm.csproj" /> | ||
| <ProjectReference Include="..\ResidentialBuilding.Gateway\ResidentialBuilding.Gateway.csproj" /> | ||
| </ItemGroup> | ||
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| </Project> |
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|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| { | ||
| "Logging": { | ||
| "LogLevel": { | ||
| "Default": "Information", | ||
| "Microsoft.AspNetCore": "Warning" | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| { | ||
| "Logging": { | ||
| "LogLevel": { | ||
| "Default": "Information", | ||
| "Microsoft.AspNetCore": "Warning", | ||
| "Aspire.Hosting.Dcp": "Warning" | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| using Ocelot.LoadBalancer.Interfaces; | ||
| using Ocelot.Responses; | ||
| using Ocelot.Values; | ||
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| namespace ResidentialBuilding.Gateway.LoadBalancer; | ||
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| /// <summary> | ||
| /// Query-based балансировщик нагрузки для Ocelot. | ||
| /// Выбирает downstream-сервис на основе query-параметра id запроса. | ||
| /// </summary> | ||
| /// <param name="logger">Логгер.</param> | ||
| /// <param name="services">Асинхронная функция, возвращающая актуальный список доступных downstream-сервисов.</param> | ||
| public class QueryBasedLoadBalancer(ILogger<QueryBasedLoadBalancer> logger, Func<Task<List<Service>>> services) | ||
| : ILoadBalancer | ||
| { | ||
| private const string IdQueryParamName = "id"; | ||
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| public string Type => nameof(QueryBasedLoadBalancer); | ||
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| /// <summary> | ||
| /// Метод вызывается Ocelot после завершения запроса к downstream-сервису. | ||
| /// В текущей реализации ничего не делает (не требуется для query-based подхода). | ||
| /// </summary> | ||
| public void Release(ServiceHostAndPort hostAndPort) { } | ||
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| /// <summary> | ||
| /// Основной метод выбора downstream-сервиса на основе query-параметра id текущего запроса. | ||
| /// </summary> | ||
| /// <param name="httpContext">Контекст HTTP-запроса (используется для доступа к Query string).</param> | ||
| /// <returns> | ||
| /// OkResponse с выбранным адресом сервиса в зависимости от query-параметра id, либо случайно выбранный адрес | ||
| /// сервиса, если query-параметр не задан. | ||
| /// </returns> | ||
| public async Task<Response<ServiceHostAndPort>> LeaseAsync(HttpContext httpContext) | ||
| { | ||
| var currentServices = await services.Invoke(); | ||
| var query = httpContext.Request.Query; | ||
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| if (!query.TryGetValue(IdQueryParamName, out var idValues) || idValues.Count <= 0) | ||
| { | ||
| return SelectRandomService(currentServices); | ||
| } | ||
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| var idStr = idValues.First(); | ||
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| if (string.IsNullOrWhiteSpace(idStr) || !int.TryParse(idStr, out var id) || id < 0) | ||
| { | ||
| return SelectRandomService(currentServices); | ||
| } | ||
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| var index = id % currentServices.Count; | ||
| logger.LogInformation("Query based selected index={index}.", index); | ||
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| return new OkResponse<ServiceHostAndPort>(currentServices[index].HostAndPort); | ||
| } | ||
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| private OkResponse<ServiceHostAndPort> SelectRandomService(List<Service> currentServices) | ||
| { | ||
| var randomIndex = Random.Shared.Next(currentServices.Count); | ||
| logger.LogWarning("Query doesn't contain correct id parameter, index={randomIndex} selected by random.", randomIndex); | ||
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| return new OkResponse<ServiceHostAndPort>(currentServices[randomIndex].HostAndPort); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| using Ocelot.DependencyInjection; | ||
| using Ocelot.Middleware; | ||
| using ResidentialBuilding.Gateway.LoadBalancer; | ||
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| var builder = WebApplication.CreateBuilder(args); | ||
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| builder.Services.AddCors(options => | ||
| { | ||
| options.AddPolicy("AllowLocalDev", policy => | ||
| { | ||
| policy | ||
| .AllowAnyOrigin() | ||
| .WithHeaders("Content-Type") | ||
| .WithMethods("GET"); | ||
| }); | ||
| }); | ||
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| builder.Configuration | ||
| .AddJsonFile("ocelot.json", optional: false, reloadOnChange: true) | ||
| .AddOcelot(); | ||
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| builder.Services | ||
| .AddOcelot(builder.Configuration) | ||
| .AddCustomLoadBalancer((sp, _, discoveryProvider) => | ||
| { | ||
| var logger = sp.GetRequiredService<ILogger<QueryBasedLoadBalancer>>(); | ||
| return new QueryBasedLoadBalancer(logger, discoveryProvider.GetAsync); | ||
| }); | ||
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| var app = builder.Build(); | ||
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| app.UseCors("AllowLocalDev"); | ||
| await app.UseOcelot(); | ||
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| await app.RunAsync(); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| { | ||
| "$schema": "http://json.schemastore.org/launchsettings.json", | ||
| "iisSettings": { | ||
| "windowsAuthentication": false, | ||
| "anonymousAuthentication": true, | ||
| "iisExpress": { | ||
| "applicationUrl": "http://localhost:22127", | ||
| "sslPort": 44310 | ||
| } | ||
| }, | ||
| "profiles": { | ||
| "http": { | ||
| "commandName": "Project", | ||
| "dotnetRunMessages": true, | ||
| "launchBrowser": true, | ||
| "applicationUrl": "http://localhost:5298", | ||
| "environmentVariables": { | ||
| "ASPNETCORE_ENVIRONMENT": "Development" | ||
| } | ||
| }, | ||
| "https": { | ||
| "commandName": "Project", | ||
| "dotnetRunMessages": true, | ||
| "launchBrowser": true, | ||
| "applicationUrl": "https://localhost:7014;http://localhost:5298", | ||
| "environmentVariables": { | ||
| "ASPNETCORE_ENVIRONMENT": "Development" | ||
| } | ||
| }, | ||
| "IIS Express": { | ||
| "commandName": "IISExpress", | ||
| "launchBrowser": true, | ||
| "environmentVariables": { | ||
| "ASPNETCORE_ENVIRONMENT": "Development" | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk.Web"> | ||
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| <PropertyGroup> | ||
| <TargetFramework>net8.0</TargetFramework> | ||
| <Nullable>enable</Nullable> | ||
| <ImplicitUsings>enable</ImplicitUsings> | ||
| </PropertyGroup> | ||
|
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| <ItemGroup> | ||
| <PackageReference Include="Ocelot" Version="24.1.0" /> | ||
| </ItemGroup> | ||
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| <ItemGroup> | ||
| <ProjectReference Include="..\ResidentialBuilding.ServiceDefaults\ResidentialBuilding.ServiceDefaults.csproj" /> | ||
| </ItemGroup> | ||
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| </Project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| { | ||
| "Logging": { | ||
| "LogLevel": { | ||
| "Default": "Information", | ||
| "Microsoft.AspNetCore": "Warning" | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| { | ||
| "Logging": { | ||
| "LogLevel": { | ||
| "Default": "Information", | ||
| "Microsoft.AspNetCore": "Warning" | ||
| } | ||
| }, | ||
| "AllowedHosts": "*" | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,20 @@ | ||
| { | ||
| "Routes": [ | ||
| { | ||
| "DownstreamPathTemplate": "/api/residential-building", | ||
| "DownstreamScheme": "http", | ||
| "DownstreamHostAndPorts": [ | ||
| { "Host": "localhost", "Port": 5201 }, | ||
| { "Host": "localhost", "Port": 5202 }, | ||
| { "Host": "localhost", "Port": 5203 }, | ||
| { "Host": "localhost", "Port": 5204 }, | ||
| { "Host": "localhost", "Port": 5205 } | ||
| ], | ||
| "UpstreamPathTemplate": "/residential-building", | ||
| "UpstreamHttpMethod": [ "GET" ], | ||
| "LoadBalancerOptions": { | ||
| "Type": "QueryBasedLoadBalancer" | ||
| } | ||
| } | ||
| ] | ||
| } |
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