Замотохина Мария Лаб. 2 Группа 6511 #91
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@@ -6,5 +6,5 @@ | |
| } | ||
| }, | ||
| "AllowedHosts": "*", | ||
| "BaseAddress": "http://localhost:5100/medicalpatient-generator" | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,65 @@ | ||
| using Ocelot.LoadBalancer.Errors; | ||
| using Ocelot.LoadBalancer.Interfaces; | ||
| using Ocelot.Responses; | ||
| using Ocelot.ServiceDiscovery.Providers; | ||
| using Ocelot.Values; | ||
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| namespace MedicalPatient.ApiGateway.Balancer; | ||
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| public class WeightedRoundRobin(IServiceDiscoveryProvider serviceDiscovery, IReadOnlyList<int>? weights = null) | ||
| : ILoadBalancer | ||
| { | ||
| private readonly int[] _weights = (weights is { Count: > 0 } ? [.. weights] : []); | ||
| private int _cursor = -1; | ||
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| private List<int>? _wheel; | ||
| private int _lastServicesCount = -1; | ||
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| public string Type => nameof(WeightedRoundRobin); | ||
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| public async Task<Response<ServiceHostAndPort>> LeaseAsync(HttpContext httpContext) | ||
| { | ||
| var services = await serviceDiscovery.GetAsync(); | ||
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| if (services is null) | ||
| return new ErrorResponse<ServiceHostAndPort>( | ||
| new ServicesAreNullError("Service discovery returned null")); | ||
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| if (services.Count == 0) | ||
| return new ErrorResponse<ServiceHostAndPort>( | ||
| new ServicesAreNullError("No downstream services are available")); | ||
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| if (_wheel == null || _lastServicesCount != services.Count) | ||
| { | ||
| _wheel = BuildWheel(services.Count); | ||
| _lastServicesCount = services.Count; | ||
| } | ||
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| var next = (uint)Interlocked.Increment(ref _cursor); | ||
| var wheelIndex = (int)(next % (uint)_wheel.Count); | ||
| var serviceIndex = _wheel[wheelIndex]; | ||
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| return new OkResponse<ServiceHostAndPort>(services[serviceIndex].HostAndPort); | ||
| } | ||
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| private List<int> BuildWheel(int servicesCount) | ||
| { | ||
| var wheel = new List<int>(); | ||
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| for (var i = 0; i < servicesCount; i++) | ||
| { | ||
| var weight = i < _weights.Length ? _weights[i] : 1; | ||
| if (weight < 1) weight = 1; | ||
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| for (var j = 0; j < weight; j++) | ||
| wheel.Add(i); | ||
| } | ||
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| if (wheel.Count == 0) | ||
| wheel.Add(0); | ||
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| return wheel; | ||
| } | ||
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| public void Release(ServiceHostAndPort hostAndPort) { } | ||
| } | ||
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| @@ -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="..\MedicalPatient.AppHost\MedicalPatient.AppHost.ServiceDefaults\MedicalPatient.AppHost.ServiceDefaults.csproj" /> | ||
| </ItemGroup> | ||
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| </Project> |
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| @@ -0,0 +1,64 @@ | ||
| using MedicalPatient.ApiGateway.Balancer; | ||
| using MedicalPatient.AppHost.ServiceDefaults; | ||
| using Ocelot.DependencyInjection; | ||
| using Ocelot.Middleware; | ||
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| var builder = WebApplication.CreateBuilder(args); | ||
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There was a problem hiding this comment. Не хватает |
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| builder.AddServiceDefaults(); | ||
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| var allowedOrigins = builder.Configuration.GetSection("AllowedOrigins").Get<string[]>() ?? | ||
| ["https://localhost:7282", "http://localhost:5127"]; | ||
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| builder.Services.AddCors(options => | ||
| { | ||
| options.AddPolicy("ClientCorsPolicy", policy => | ||
| { | ||
| policy.WithOrigins(allowedOrigins) | ||
| .WithMethods("GET", "POST", "PUT", "DELETE") | ||
| .WithHeaders("Authorization", "Content-Type") | ||
| .AllowCredentials(); | ||
| }); | ||
| }); | ||
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| builder.Configuration | ||
| .AddJsonFile("ocelot.json", optional: false, reloadOnChange: true); | ||
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| var generators = builder.Configuration.GetSection("Generators").Get<string[]>() ?? []; | ||
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| var configuredWeights = builder.Configuration | ||
| .GetSection("Routes:0:DownstreamHostWeights") | ||
| .GetChildren() | ||
| .Select(x => x.GetValue("Weight", 1)) | ||
| .Where(w => w > 0) | ||
| .ToArray(); | ||
| var weights = configuredWeights.Length > 0 ? configuredWeights : [3, 2, 1]; | ||
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| var addressOverrides = new List<KeyValuePair<string, string?>>(); | ||
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| for (var i = 0; i < generators.Length; ++i) | ||
| { | ||
| var name = generators[i]; | ||
| var url = builder.Configuration[$"services:{name}:http:0"]; | ||
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| if (!string.IsNullOrEmpty(url) && Uri.TryCreate(url, UriKind.Absolute, out var uri)) | ||
| { | ||
| addressOverrides.Add(new($"Routes:0:DownstreamHostAndPorts:{i}:Host", uri.Host)); | ||
| addressOverrides.Add(new($"Routes:0:DownstreamHostAndPorts:{i}:Port", uri.Port.ToString())); | ||
| } | ||
| } | ||
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| if (addressOverrides.Count > 0) | ||
| builder.Configuration.AddInMemoryCollection(addressOverrides); | ||
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| builder.Services | ||
| .AddOcelot(builder.Configuration) | ||
| .AddCustomLoadBalancer<WeightedRoundRobin>((route, serviceDiscovery) => | ||
| new WeightedRoundRobin(serviceDiscovery, weights)); | ||
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| var app = builder.Build(); | ||
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| app.UseCors("ClientCorsPolicy"); | ||
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| await app.UseOcelot(); | ||
| await app.RunAsync(); | ||
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| @@ -0,0 +1,23 @@ | ||
| { | ||
| "$schema": "http://json.schemastore.org/launchsettings.json", | ||
| "profiles": { | ||
| "http": { | ||
| "commandName": "Project", | ||
| "dotnetRunMessages": true, | ||
| "launchBrowser": true, | ||
| "applicationUrl": "http://localhost:5100", | ||
| "environmentVariables": { | ||
| "ASPNETCORE_ENVIRONMENT": "Development" | ||
| } | ||
| }, | ||
| "https": { | ||
| "commandName": "Project", | ||
| "dotnetRunMessages": true, | ||
| "launchBrowser": true, | ||
| "applicationUrl": "https://localhost:7293;http://localhost:5100", | ||
| "environmentVariables": { | ||
| "ASPNETCORE_ENVIRONMENT": "Development" | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,11 @@ | ||
| { | ||
| "Logging": { | ||
| "LogLevel": { | ||
| "Default": "Information", | ||
| "Microsoft.AspNetCore": "Warning" | ||
| } | ||
| }, | ||
| "GlobalConfiguration": { | ||
| "BaseUrl": "http://localhost:5100" | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| { | ||
| "AllowedOrigins": [ | ||
| "https://localhost:7282", | ||
| "http://localhost:5127" | ||
| ], | ||
| "Logging": { | ||
| "LogLevel": { | ||
| "Default": "Information", | ||
| "Microsoft.AspNetCore": "Warning" | ||
| } | ||
| }, | ||
| "AllowedHosts": "*", | ||
| "Generators": [ "generator-1", "generator-2", "generator-3" ] | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| { | ||
| "Routes": [ | ||
| { | ||
| "DownstreamPathTemplate": "/medicalpatient-generator", | ||
| "DownstreamScheme": "http", | ||
| "DownstreamHostAndPorts": [ | ||
| { | ||
| "Host": "localhost", | ||
| "Port": 5101 | ||
| }, | ||
| { | ||
| "Host": "localhost", | ||
| "Port": 5102 | ||
| }, | ||
| { | ||
| "Host": "localhost", | ||
| "Port": 5103 | ||
| } | ||
| ], | ||
| "UpstreamPathTemplate": "/medicalpatient-generator", | ||
| "UpstreamHttpMethod": [ "GET" ], | ||
| "LoadBalancerOptions": { | ||
| "Type": "WeightedRoundRobin" | ||
| }, | ||
| "DownstreamHostWeights": [ | ||
| { | ||
| "Host": "localhost", | ||
| "Port": 5101, | ||
| "Weight": 3 | ||
| }, | ||
| { | ||
| "Host": "localhost", | ||
| "Port": 5102, | ||
| "Weight": 2 | ||
| }, | ||
| { | ||
| "Host": "localhost", | ||
| "Port": 5103, | ||
| "Weight": 1 | ||
| } | ||
| ] | ||
| } | ||
| ] | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
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| <Sdk Name="Aspire.AppHost.Sdk" Version="9.5.2" /> | ||
| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| <TargetFramework>net8.0</TargetFramework> | ||
| <ImplicitUsings>enable</ImplicitUsings> | ||
| <Nullable>enable</Nullable> | ||
| <IsAspireHost>true</IsAspireHost> | ||
| <UserSecretsId>fe743bf2-08eb-41c7-817b-f144b739dce3</UserSecretsId> | ||
| </PropertyGroup> | ||
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| <ItemGroup> | ||
| <PackageReference Include="Aspire.Hosting" Version="9.5.2" /> | ||
| <PackageReference Include="Aspire.Hosting.AppHost" Version="9.5.2" /> | ||
| <PackageReference Include="Aspire.Hosting.Redis" Version="9.5.2" /> | ||
| </ItemGroup> | ||
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| <ItemGroup> | ||
| <ProjectReference Include="..\..\Client.Wasm\Client.Wasm.csproj" /> | ||
| <ProjectReference Include="..\..\MedicalPatient.ApiGateway\MedicalPatient.ApiGateway.csproj" /> | ||
| <ProjectReference Include="..\..\MedicalPatient.Generator\MedicalPatient.Generator.csproj" /> | ||
| </ItemGroup> | ||
|
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| </Project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| var builder = DistributedApplication.CreateBuilder(args); | ||
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| var redis = builder.AddRedis("redis") | ||
| .WithRedisCommander(); | ||
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| var generator1 = builder.AddProject<Projects.MedicalPatient_Generator>("generator-1") | ||
| .WithEndpoint("http", endpoint => endpoint.Port = 5101) | ||
| .WithReference(redis) | ||
| .WaitFor(redis) | ||
| .WithExternalHttpEndpoints(); | ||
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| var generator2 = builder.AddProject<Projects.MedicalPatient_Generator>("generator-2") | ||
| .WithEndpoint("http", endpoint => endpoint.Port = 5102) | ||
| .WithReference(redis) | ||
| .WaitFor(redis) | ||
| .WithExternalHttpEndpoints(); | ||
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| var generator3 = builder.AddProject<Projects.MedicalPatient_Generator>("generator-3") | ||
| .WithEndpoint("http", endpoint => endpoint.Port = 5103) | ||
| .WithReference(redis) | ||
| .WaitFor(redis) | ||
| .WithExternalHttpEndpoints(); | ||
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| var gateway = builder | ||
| .AddProject<Projects.MedicalPatient_ApiGateway>("medicalpatient-apigateway") | ||
| .WithReference(generator1) | ||
| .WithReference(generator2) | ||
| .WithReference(generator3) | ||
| .WithExternalHttpEndpoints() | ||
| .WaitFor(generator1) | ||
| .WaitFor(generator2) | ||
| .WaitFor(generator3); | ||
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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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Эта реализация лучше, чем вариант при котором делается список из сервисов, но большой список в памяти можно и здесь получить, если будут большие веса
Но можно и так оставить