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Author SHA1 Message Date
355a81050f commit 2024-01-09 17:48:51 +03:00
27 changed files with 1583 additions and 24 deletions

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# Отчет по лабораторной работе №3
Выполнил студент гр. ИСЭбд-41 Насыбуллов А.И.
## REST API, Gateway и синхронный обмен между микросервисами
## Создание микросервисов
1. С помощью команды `dotnet new web -n worker-2` в терминале создал первый микросервис
2. Добавил решение командой `dotnet new sln`
3. Связал решение и проект командой `dotnet sln worker-2.sln add worker-2.csproj`
4. Повторил действие для второго микросервиса
5. Добавил библиотеку Swagger и OpenAi в проекты и запустил с помощью команды `dotnet run`
Скриншоты протестированных микросервисов:
![](pic/1.png)
![](pic/2.png)
## Реализация синхронного обмена
Реализовал код, который вызывает сихронно данные из соседнего микросервиса.
```cs
//worker-2
app.MapGet("/Requests/", async () =>
{
var httpClient = new HttpClient();
var secondWorkerResponse = await httpClient.GetStringAsync("http://worker-1:8080/");
return secondWorkerResponse.ToArray();
})
.WithName("GetRequests")
.WithOpenApi();
```
## Реализация gateway при помощи nginx
Добавил nginx.conf:
```conf
server {
listen 8080;
listen [::]:8080;
server_name localhost;
location / {
root /usr/share/nginx/html;
index index.html index.htm;
}
location /worker-1/ {
proxy_pass http://worker-1:8080/;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Forwarded-Prefix /worker-1;
}
location /worker-2/ {
proxy_pass http://worker-2:8080/;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Forwarded-Prefix /worker-2;
}
}
```
Результат, после выполнения команды `docker-compose up`:
Docker:
![](pic/3.png)
index.html на gateway-1:
![](pic/4.png)
worker-1:
![](pic/5.png)
worker-2:
![](pic/6.png)

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version: "3.1"
services:
worker-1:
build: ./worker-1
worker-2:
build: ./worker-2
depends_on:
- worker-1
gateway:
image: nginx:latest
ports:
- 8080:8080
volumes:
- ./static:/usr/share/nginx/html:ro
- ./nginx.conf:/etc/nginx/conf.d/default.conf:ro

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server {
listen 8080;
listen [::]:8080;
server_name localhost;
location / {
root /usr/share/nginx/html;
index index.html index.htm;
}
location /worker-1/ {
proxy_pass http://worker-1:8080/;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Forwarded-Prefix /worker-1;
}
location /worker-2/ {
proxy_pass http://worker-2:8080/;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Forwarded-Prefix /worker-2;
}
}

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<!DOCTYPE html>
<html lang="ru">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Тестовое приложение для л/р 3</title>
</head>
<body>
<p>Мытарин Е.С. ИСЭбд-41.</p>
<p><a href="/worker-1/">Отправить запрос к worker-1</a></p>
<p><a href="/worker-2/">Отправить запрос к worker-2</a></p>
</body>
</html>

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FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build-env
WORKDIR /app
COPY . ./
RUN dotnet restore
RUN dotnet publish -c Release -o out
FROM mcr.microsoft.com/dotnet/aspnet:8.0
WORKDIR /app
COPY --from=build-env /app/out .
ENTRYPOINT ["dotnet", "worker-1.dll"]

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List<Request> requests = new()
{
new Request() { Uuid= Guid.Parse("7184fa5f-b786-4478-863a-99cc000eb752"), Title = "Расход на коммуналку", SourceOfFunds = "Мердеев", Sum = 100000, IsCompleted = false },
new Request() { Uuid= Guid.Parse("55a9aed1-218a-468e-92b9-99f6a6a34543"), Title = "Расход на газ", SourceOfFunds = "Киселев", Sum = 25000, IsCompleted = true },
};
var builder = WebApplication.CreateBuilder(args);
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
var app = builder.Build();
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}
app.UseHttpsRedirection();
app.MapGet("/", () =>
{
return requests.Select(r => new RequestEntityDto()
{
Uuid = r.Uuid,
Title = r.Title,
Sum = r.Sum,
SourceOfFunds = r.SourceOfFunds,
IsCompleted = r.IsCompleted,
});
})
.WithName("GetRequests")
.WithOpenApi();
app.MapGet("/{uuid}", (Guid uuid) =>
{
var request = requests.FirstOrDefault(r => r.Uuid == uuid);
if (request == null)
return Results.NotFound();
return Results.Json(new RequestEntityDto()
{
Uuid = request.Uuid,
Title = request.Title,
Sum = request.Sum,
SourceOfFunds = request.SourceOfFunds,
IsCompleted = request.IsCompleted,
});
})
.WithName("GetRequestByGUID")
.WithOpenApi();
app.MapPost("/{title}/{sourceOfFunds}/{sum}/{isCompleted}", (string title, string sourceOfFunds, decimal sum, bool isCompleted) =>
{
Guid NewGuid = Guid.NewGuid();
requests.Add(new Request() { Uuid = NewGuid, Title = (string)title, SourceOfFunds = (string)sourceOfFunds, Sum = (decimal)sum, IsCompleted = (bool)isCompleted});
var request = requests.FirstOrDefault(r => r.Uuid == NewGuid);
if (request == null)
return Results.NotFound();
return Results.Json(new RequestEntityDto()
{
Uuid = request.Uuid,
Title = request.Title,
Sum = request.Sum,
SourceOfFunds = request.SourceOfFunds,
IsCompleted = request.IsCompleted,
});
})
.WithName("PostRequest")
.WithOpenApi();
app.MapPatch("/{uuid}/{title}/{sourceOfFunds}/{sum}/{isCompleted}", (Guid uuid, string ?title, string ?sourceOfFunds, decimal sum, bool isCompleted) =>
{
var request = requests.FirstOrDefault(r => r.Uuid == uuid);
if (request == null)
return Results.NotFound();
if (title != null) request.Title = title;
if (sourceOfFunds != ",") request.SourceOfFunds = sourceOfFunds;
if (sum != request.Sum && sum != 0) request.Sum = sum;
if (isCompleted != request.IsCompleted) request.IsCompleted = isCompleted;
return Results.Json(new RequestEntityDto()
{
Uuid = request.Uuid,
Title = request.Title,
Sum = request.Sum,
SourceOfFunds = request.SourceOfFunds,
IsCompleted = request.IsCompleted,
});
})
.WithName("UpdateRequest")
.WithOpenApi();
app.MapDelete("/{uuid}", (Guid uuid) =>
{
var request = requests.FirstOrDefault(r => r.Uuid == uuid);
if (request == null)
return Results.NotFound();
requests.Remove(request);
return Results.Json(new RequestEntityDto()
{
Uuid = request.Uuid,
Title = request.Title,
Sum = request.Sum,
SourceOfFunds = request.SourceOfFunds,
IsCompleted = request.IsCompleted,
});
})
.WithName("DeleteRequestByGUID")
.WithOpenApi();
app.Run();
public class Request
{
public Guid Uuid { get; set; }
public string Title { get; set; } = string.Empty;
public string SourceOfFunds { get; set; } = string.Empty;
public decimal Sum { get; set; } = 0;
public bool IsCompleted { get; set; }
}
public class RequestEntityDto : Request { }

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{
"$schema": "http://json.schemastore.org/launchsettings.json",
"iisSettings": {
"windowsAuthentication": false,
"anonymousAuthentication": true,
"iisExpress": {
"applicationUrl": "http://localhost:51956",
"sslPort": 44303
}
},
"profiles": {
"http": {
"commandName": "Project",
"dotnetRunMessages": true,
"launchBrowser": true,
"applicationUrl": "http://localhost:5197",
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Development"
}
},
"https": {
"commandName": "Project",
"dotnetRunMessages": true,
"launchBrowser": true,
"applicationUrl": "https://localhost:7027;http://localhost:5197",
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Development"
}
},
"IIS Express": {
"commandName": "IISExpress",
"launchBrowser": true,
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Development"
}
}
}
}

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{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft.AspNetCore": "Warning"
}
}
}

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{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft.AspNetCore": "Warning"
}
},
"AllowedHosts": "*"
}

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<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>net8.0</TargetFramework>
<Nullable>enable</Nullable>
<ImplicitUsings>enable</ImplicitUsings>
<RootNamespace>worker_1</RootNamespace>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="8.0.0" />
<PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />
</ItemGroup>
</Project>

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Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio Version 17
VisualStudioVersion = 17.0.31903.59
MinimumVisualStudioVersion = 10.0.40219.1
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "worker-1", "worker-1.csproj", "{90F6C7BD-78E2-47C8-A702-DD47E74D3865}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
Release|Any CPU = Release|Any CPU
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{90F6C7BD-78E2-47C8-A702-DD47E74D3865}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{90F6C7BD-78E2-47C8-A702-DD47E74D3865}.Debug|Any CPU.Build.0 = Debug|Any CPU
{90F6C7BD-78E2-47C8-A702-DD47E74D3865}.Release|Any CPU.ActiveCfg = Release|Any CPU
{90F6C7BD-78E2-47C8-A702-DD47E74D3865}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
EndGlobal

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##
## Get latest from `dotnet new gitignore`
# dotenv files
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# User-specific files
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[Ll]og/
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# Visual Studio 2015/2017 cache/options directory
.vs/
# Uncomment if you have tasks that create the project's static files in wwwroot
#wwwroot/
# Visual Studio 2017 auto generated files
Generated\ Files/
# MSTest test Results
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# NUnit
*.VisualState.xml
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# StyleCop
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# Files built by Visual Studio
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*.tmp_proj
*_wpftmp.csproj
*.log
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# Installshield output folder
[Ee]xpress/
# DocProject is a documentation generator add-in
DocProject/buildhelp/
DocProject/Help/*.HxT
DocProject/Help/*.HxC
DocProject/Help/*.hhc
DocProject/Help/*.hhk
DocProject/Help/*.hhp
DocProject/Help/Html2
DocProject/Help/html
# Click-Once directory
publish/
# Publish Web Output
*.[Pp]ublish.xml
*.azurePubxml
# Note: Comment the next line if you want to checkin your web deploy settings,
# but database connection strings (with potential passwords) will be unencrypted
*.pubxml
*.publishproj
# Microsoft Azure Web App publish settings. Comment the next line if you want to
# checkin your Azure Web App publish settings, but sensitive information contained
# in these scripts will be unencrypted
PublishScripts/
# NuGet Packages
*.nupkg
# NuGet Symbol Packages
*.snupkg
# The packages folder can be ignored because of Package Restore
**/[Pp]ackages/*
# except build/, which is used as an MSBuild target.
!**/[Pp]ackages/build/
# Uncomment if necessary however generally it will be regenerated when needed
#!**/[Pp]ackages/repositories.config
# NuGet v3's project.json files produces more ignorable files
*.nuget.props
*.nuget.targets
# Microsoft Azure Build Output
csx/
*.build.csdef
# Microsoft Azure Emulator
ecf/
rcf/
# Windows Store app package directories and files
AppPackages/
BundleArtifacts/
Package.StoreAssociation.xml
_pkginfo.txt
*.appx
*.appxbundle
*.appxupload
# Visual Studio cache files
# files ending in .cache can be ignored
*.[Cc]ache
# but keep track of directories ending in .cache
!?*.[Cc]ache/
# Others
ClientBin/
~$*
*~
*.dbmdl
*.dbproj.schemaview
*.jfm
*.pfx
*.publishsettings
orleans.codegen.cs
# Including strong name files can present a security risk
# (https://github.com/github/gitignore/pull/2483#issue-259490424)
#*.snk
# Since there are multiple workflows, uncomment next line to ignore bower_components
# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
#bower_components/
# RIA/Silverlight projects
Generated_Code/
# Backup & report files from converting an old project file
# to a newer Visual Studio version. Backup files are not needed,
# because we have git ;-)
_UpgradeReport_Files/
Backup*/
UpgradeLog*.XML
UpgradeLog*.htm
ServiceFabricBackup/
*.rptproj.bak
# SQL Server files
*.mdf
*.ldf
*.ndf
# Business Intelligence projects
*.rdl.data
*.bim.layout
*.bim_*.settings
*.rptproj.rsuser
*- [Bb]ackup.rdl
*- [Bb]ackup ([0-9]).rdl
*- [Bb]ackup ([0-9][0-9]).rdl
# Microsoft Fakes
FakesAssemblies/
# GhostDoc plugin setting file
*.GhostDoc.xml
# Node.js Tools for Visual Studio
.ntvs_analysis.dat
node_modules/
# Visual Studio 6 build log
*.plg
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*.opt
# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
*.vbw
# Visual Studio 6 auto-generated project file (contains which files were open etc.)
*.vbp
# Visual Studio 6 workspace and project file (working project files containing files to include in project)
*.dsw
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# Visual Studio 6 technical files
*.ncb
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# Visual Studio LightSwitch build output
**/*.HTMLClient/GeneratedArtifacts
**/*.DesktopClient/GeneratedArtifacts
**/*.DesktopClient/ModelManifest.xml
**/*.Server/GeneratedArtifacts
**/*.Server/ModelManifest.xml
_Pvt_Extensions
# Paket dependency manager
.paket/paket.exe
paket-files/
# FAKE - F# Make
.fake/
# CodeRush personal settings
.cr/personal
# Python Tools for Visual Studio (PTVS)
__pycache__/
*.pyc
# Cake - Uncomment if you are using it
# tools/**
# !tools/packages.config
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*.jmconfig
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*.btp.cs
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OpenCover/
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ASALocalRun/
# MSBuild Binary and Structured Log
*.binlog
# NVidia Nsight GPU debugger configuration file
*.nvuser
# MFractors (Xamarin productivity tool) working folder
.mfractor/
# Local History for Visual Studio
.localhistory/
# Visual Studio History (VSHistory) files
.vshistory/
# BeatPulse healthcheck temp database
healthchecksdb
# Backup folder for Package Reference Convert tool in Visual Studio 2017
MigrationBackup/
# Ionide (cross platform F# VS Code tools) working folder
.ionide/
# Fody - auto-generated XML schema
FodyWeavers.xsd
# VS Code files for those working on multiple tools
.vscode/*
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!.vscode/tasks.json
!.vscode/launch.json
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*.code-workspace
# Local History for Visual Studio Code
.history/
# Windows Installer files from build outputs
*.cab
*.msi
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*.msp
# JetBrains Rider
*.sln.iml
.idea
##
## Visual studio for Mac
##
# globs
Makefile.in
*.userprefs
*.usertasks
config.make
config.status
aclocal.m4
install-sh
autom4te.cache/
*.tar.gz
tarballs/
test-results/
# Mac bundle stuff
*.dmg
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# content below from: https://github.com/github/gitignore/blob/master/Global/macOS.gitignore
# General
.DS_Store
.AppleDouble
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# Icon must end with two \r
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# Thumbnails
._*
# Files that might appear in the root of a volume
.DocumentRevisions-V100
.fseventsd
.Spotlight-V100
.TemporaryItems
.Trashes
.VolumeIcon.icns
.com.apple.timemachine.donotpresent
# Directories potentially created on remote AFP share
.AppleDB
.AppleDesktop
Network Trash Folder
Temporary Items
.apdisk
# content below from: https://github.com/github/gitignore/blob/master/Global/Windows.gitignore
# Windows thumbnail cache files
Thumbs.db
ehthumbs.db
ehthumbs_vista.db
# Dump file
*.stackdump
# Folder config file
[Dd]esktop.ini
# Recycle Bin used on file shares
$RECYCLE.BIN/
# Windows Installer files
*.cab
*.msi
*.msix
*.msm
*.msp
# Windows shortcuts
*.lnk
# Vim temporary swap files
*.swp

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@@ -0,0 +1,11 @@
FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build-env
WORKDIR /app
COPY . ./
RUN dotnet restore
RUN dotnet publish -c Release -o out
FROM mcr.microsoft.com/dotnet/aspnet:8.0
WORKDIR /app
COPY --from=build-env /app/out .
ENTRYPOINT ["dotnet", "worker-2.dll"]

View File

@@ -0,0 +1,145 @@
List<Agreement> agrs = new()
{
new Agreement() { Uuid= Guid.NewGuid(), Number = "75ИФ-61", Date = new DateOnly(), Sum = 50000, IdRequest = Guid.Parse("7184fa5f-b786-4478-863a-99cc000eb752") }
};
var builder = WebApplication.CreateBuilder(args);
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
var app = builder.Build();
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}
app.UseHttpsRedirection();
app.MapGet("/", () =>
{
return agrs.Select(r => new AgreementEntityDto()
{
Uuid = r.Uuid,
Number = r.Number,
Sum = r.Sum,
Date = r.Date,
IdRequest = r.IdRequest,
});
})
.WithName("GetAgreements")
.WithOpenApi();
app.MapGet("/{uuid}", (Guid uuid) =>
{
var agr = agrs.FirstOrDefault(r => r.Uuid == uuid);
if (agr == null)
return Results.NotFound();
return Results.Json(new AgreementEntityDto()
{
Uuid = agr.Uuid,
Number = agr.Number,
Sum = agr.Sum,
Date = agr.Date,
IdRequest = agr.IdRequest,
});
})
.WithName("GetAgreementByGUID")
.WithOpenApi();
app.MapPost("/{number}/{date}/{sum}/{idRequest}", (string? number, DateOnly date, decimal sum, Guid idRequest) =>
{
Guid NewGuid = Guid.NewGuid();
agrs.Add(new Agreement() { Uuid = NewGuid, Number = (string)number, Date = (DateOnly)date, Sum = (decimal)sum, IdRequest = (Guid)idRequest });
var agr = agrs.FirstOrDefault(r => r.Uuid == NewGuid);
if (agr == null)
return Results.NotFound();
return Results.Json(new AgreementEntityDto()
{
Uuid = agr.Uuid,
Number = agr.Number,
Sum = agr.Sum,
Date = agr.Date,
IdRequest = agr.IdRequest,
});
})
.WithName("PostAgreement")
.WithOpenApi();
app.MapPatch("/{uuid}/{number}/{date}/{sum}/{idRequest}", (Guid uuid, string ?number, DateOnly date, decimal sum, Guid idRequest) =>
{
var agr = agrs.FirstOrDefault(r => r.Uuid == uuid);
if (agr == null)
return Results.NotFound();
if (number != ",") agr.Number = number;
if (date != null)agr.Date = date;
if (sum != agr.Sum && sum != 0) agr.Sum = sum;
if (idRequest != agr.IdRequest) agr.IdRequest = idRequest;
return Results.Json(new AgreementEntityDto()
{
Uuid = agr.Uuid,
Number = agr.Number,
Sum = agr.Sum,
Date = agr.Date,
IdRequest = agr.IdRequest,
});
})
.WithName("UpdateAgreement")
.WithOpenApi();
app.MapDelete("/{uuid}", (Guid uuid) =>
{
var agr = agrs.FirstOrDefault(r => r.Uuid == uuid);
if (agr == null)
return Results.NotFound();
agrs.Remove(agr);
return Results.Json(new AgreementEntityDto()
{
Uuid = agr.Uuid,
Number = agr.Number,
Sum = agr.Sum,
Date = agr.Date,
IdRequest = agr.IdRequest,
});
})
.WithName("DeleteAgreement")
.WithOpenApi();
app.MapGet("/Requests/", async () =>
{
var httpClient = new HttpClient();
var secondWorkerResponse = await httpClient.GetStringAsync("http://worker-1:8080/");
return secondWorkerResponse.ToArray();
})
.WithName("GetRequests")
.WithOpenApi();
app.Run();
public class Agreement
{
public Guid Uuid { get; set; }
public string Number { get; set; } = string.Empty;
public DateOnly Date { get; set; }
public Guid IdRequest { get; set; }
public decimal Sum { get; set; } = 0;
}
public class AgreementEntityDto : Agreement { }
public class Request
{
public Guid Uuid { get; set; }
public string Title { get; set; } = string.Empty;
public string SourceOfFunds { get; set; } = string.Empty;
public decimal Sum { get; set; } = 0;
public bool IsCompleted { get; set; }
}
public class RequestEntityDto : Request { }

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@@ -0,0 +1,38 @@
{
"$schema": "http://json.schemastore.org/launchsettings.json",
"iisSettings": {
"windowsAuthentication": false,
"anonymousAuthentication": true,
"iisExpress": {
"applicationUrl": "http://localhost:36404",
"sslPort": 44384
}
},
"profiles": {
"http": {
"commandName": "Project",
"dotnetRunMessages": true,
"launchBrowser": true,
"applicationUrl": "http://localhost:5101",
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Development"
}
},
"https": {
"commandName": "Project",
"dotnetRunMessages": true,
"launchBrowser": true,
"applicationUrl": "https://localhost:7125;http://localhost:5101",
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Development"
}
},
"IIS Express": {
"commandName": "IISExpress",
"launchBrowser": true,
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Development"
}
}
}
}

View File

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

View File

@@ -0,0 +1,9 @@
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft.AspNetCore": "Warning"
}
},
"AllowedHosts": "*"
}

View File

@@ -0,0 +1,15 @@
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>net8.0</TargetFramework>
<Nullable>enable</Nullable>
<ImplicitUsings>enable</ImplicitUsings>
<RootNamespace>worker_2</RootNamespace>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="8.0.0" />
<PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />
</ItemGroup>
</Project>

View File

@@ -0,0 +1,22 @@

Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio Version 17
VisualStudioVersion = 17.0.31903.59
MinimumVisualStudioVersion = 10.0.40219.1
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "worker-2", "worker-2.csproj", "{C9D63524-2C63-4E86-91B6-D86955CFA5F8}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
Release|Any CPU = Release|Any CPU
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{C9D63524-2C63-4E86-91B6-D86955CFA5F8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{C9D63524-2C63-4E86-91B6-D86955CFA5F8}.Debug|Any CPU.Build.0 = Debug|Any CPU
{C9D63524-2C63-4E86-91B6-D86955CFA5F8}.Release|Any CPU.ActiveCfg = Release|Any CPU
{C9D63524-2C63-4E86-91B6-D86955CFA5F8}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
EndGlobal

View File

@@ -1,24 +0,0 @@
# Отчет по лабораторной работе №7
Выполнил студент гр. ИСЭбд-41 Насыбуллов А.И.
## Задачи
Написать небольшое эссе (буквально несколько абзацев) своими словами. А помогут Вам в этом вопросы из списка:
1. Какие алгоритмы и методы используются для балансировки нагрузки?
2. Какие открытые технологии существуют для балансировки нагрузки?
3. Как осуществляется балансировка нагрузки на базах данных?
4. Реверс-прокси как один из элементов балансировки нагрузки.
## Эссе
Балансировка нагрузки предназначена для равномерного распределения трафика и нагрузки между несколькими серверами или ресурсами. Она осуществляется с целью оптимизации производительности системы, улучшения доступности и минимизации риска перегрузки одного сервера. Классический пример - циклический перебор, когда балансировщик нагрузок отправляет по очереди запрос каждому серверу. Чем больше серверов тем меньше приходится нагрузки на каждого из них. Улучшенной версией является взвешенный циклический перебор, где каждому серверу назначаются веса мощности.
Среди открытых технологий для балансировки нагрузки можно выделить Nginx. Nginx очень популярен для распределения HTTP и HTTPS трафика с целью достижения равномерной загрузки между серверами. В качестве примеров еще можно выделить Apache HTTP Server и HAProxy.
В контексте баз данных можно выделить следующие подходы к реализации балансировки нагрузки:
1. Горизонтальное масштабирование шардирование, т.е. разбиение данные на несколько фрагментов, которые хранятся на отдельных серверах;
2. Вертикальное масштабирование на сервере увеличиваются производительность за счет добавления более мощного оборудования;
3. Репликация распределение нагрузок на чтение данных.
Обратный прокси это добавление прокси-сервера между клиентами и серверами базы данных. Прокси-сервер может распределить запросы от клиентов между несколькими серверами баз данных на основе различных алгоритмов балансировки нагрузки. Одним из таких алгоритмов является вышеупомянутая библиотека NGINX.